www.holley.com
Open in
urlscan Pro
2606:4700::6812:778
Public Scan
Submitted URL: https://msdhelp.com/
Effective URL: https://www.holley.com/support/ignition/
Submission: On July 03 via api from US — Scanned from DE
Effective URL: https://www.holley.com/support/ignition/
Submission: On July 03 via api from US — Scanned from DE
Form analysis 3 forms found in the DOM
javascript:gosearch()
<form class="header-search" action="javascript:gosearch()">
<input id="header-search-input" type="text" name="q" value="" class="search-input input-text suggester-search ui-autocomplete-input" maxlength="128" placeholder="Search Part #, Category, or Keywords" autocomplete="off" autocorrect="off"
autocapitalize="off" data-lpignore="true" aria-label="Search"><button type="submit" class="search-button" aria-label="Search"><span id="nav-search-button" class="egi eg-icon-Search"></span></button>
</form>javascript:gosearch()
<form class="header-search" action="javascript:gosearch()">
<input id="mobile-search-input" type="text" name="q" value="" class="search-input input-text suggester-search ui-autocomplete-input" maxlength="128" placeholder="Search Part #, Category, or Keywords" autocomplete="off" autocorrect="off"
autocapitalize="off" data-lpignore="true" aria-label="Search"><button type="submit" class="search-button" title="Search"><span id="mobile-search-button" class="egi eg-icon-Search"></span></button>
</form>POST /news/subscribe/
<form method="POST" action="/news/subscribe/">
<input type="email" id="newsletter-email" name="email" placeholder="Enter your email address" class="input-text required-entry validate-email" aria-label="Email Signup">
<button type="submit" id="newsletter-submit" class="button weight-500">Sign Up</button>
</form>Text Content
Holley uses cookies and other tracking technologies to collect information about
you/your website experience and shares it with our analytics and advertising
partners as described in our Privacy Policy. By continuing to browse or by
closing out of this message, you indicate your agreement.
Accept
Skip to main content
Supercharged Summer Clearance - Big Savings!
Motor Life Events Community Support
* Categories
* Categories
* New & Hot Products
* Engine
* Categories / Engine
* *
Accessory Drive Brackets and Kits
*
Intake Manifolds
*
Oil Pans
*
Oil Pumps
Also in Engine
* Air Cleaners
* Crate Engines
* Engine Dress Up
* Engine Mounts
* Forced Induction
* Harmonic Balancers
* Timing Covers
* Valley Covers
* Valve Covers
* Valvetrain
* View All
* LS Power
* Categories / LS Power
* *
LS Swap Systems
*
LS EFI Systems
*
LS Intakes
*
LS Exhaust
Also in LS Power
* EFI Components
* Engine and Transmission mounts
* Fuel Pump Regulator and Filter
* Fuel Tanks
* LS Accessory Drive Brackets and Kits
* LS Drivetrain
* LS Engine Components
* LS Gaskets
* LS Ignition Products
* LS Swap Oil Pans
* LS Swap Radiators
* LS Throttle Bodies
* LS Tools
* LS Valve Covers & Engine Appearance
* LS and LT Nitrous Systems
* View All
* Clearance
* Engine Swap Parts
* Categories / Engine Swap Parts
* *
LS Swap Systems
*
Gen-V LT Swap Systems
*
Coyote Swap Systems
*
Godzilla Swap Systems
Also in Engine Swap Parts
* Accessory Drive Brackets and Kits
* Exhaust Systems
* Gen III Hemi Swap Systems
* Mounts and Crossmembers
* Swap Accessories
* View All
* Marine and Powersports
* Categories / Marine and Powersports
* *
Marine
*
Motorcycle
*
UTV
*
ATV
Also in Marine and Powersports
* Personal Watercraft
* Small Engine
* View All
* Air & Fuel Delivery
* Categories / Air & Fuel Delivery
* *
EFI - Fuel Injection
*
Carburetors
*
Carburetor Components
*
Fuel Pumps Regulators and Filters
Also in Air & Fuel Delivery
* Air Cleaners
* Air Scoops
* Cold Air Intake
* Fuel System Kits
* Fuel Tanks and Fuel Cells
* HydraMat
* View All
* Exhaust
* Categories / Exhaust
* *
Exhaust Systems
*
Headers and Exhaust Manifolds
*
Performance Mufflers
*
Catalytic Converters
Also in Exhaust
* Builder Components
* Cut-Outs and Multi-Mode Kits
* Exhaust Tips
* X Pipes Y Pipes and H Pipes
* View All
* Nitrous
* Categories / Nitrous
* *
EFI Systems
*
Carbureted Plate Systems
*
Diesel Systems
*
Powersport Systems
Also in Nitrous
* Bottles and Accessories
* Controllers and Accessories
* Direct Port Systems
* Distribution Blocks, Filters, Adapters and Fittings
* Electrical and Wiring
* Fuel Pumps and Regulators
* Gauges
* Hose Lines and Tubing
* Intercooler Sprayers
* Microswitch and Solenoid Mounting Brackets
* NOS Jets
* Nitrous Blowdown Hoses and Tubes
* Nitrous Plates
* Nozzles
* Purge Kits
* Refill Kits and Components
* Solenoids and Solenoid Service Parts
* Tools
* View All
* Apparel & Collectibles
* Categories / Apparel & Collectibles
* *
Back to School
*
Limited Edition
*
Holley Collection
*
Shirts
Also in Apparel & Collectibles
* Backpacks
* Banners
* Clocks
* Decals
* Diecast
* Drinkware
* Face Masks & Gaiters
* Headwear
* Hitch Cover
* Hoodies
* Jackets
* Ladies Apparel
* Literature
* Metal Signs
* Misc
* Pet Accessories
* Polo Shirts
* Sunglasses
* Tote Bags
* Youth Apparel
* View All
* Exterior
* Categories / Exterior
* *
Long Bed to Short Bed Conversions
*
Bed Mats
*
Bumpers
*
Car Covers
Also in Exterior
* Convertible Tops and Components
* Decklid Panels
* Doors
* Fenders
* Firewall, Cowl, and Front Unibody
* Floor Pan and Frame
* Fuel Doors
* Graphic Kits
* Grilles
* Hood
* Lighting
* Mini Tub Kits
* Plate Frames and Accessories
* Quarter Panels
* Radiator Supports
* Rear Spoilers
* Rocker Panel
* Roof Panel
* Trim and Moldings
* Truck Bed & Parts
* Truck Cab & Parts
* Valances
* Weatherstrip
* Window and Windshield
* View All
* Off-Road
* Categories / Off-Road
* *
Leveling & Lift Kits
*
Off-Road Lighting
*
Seats
*
Winches and Recovery
Also in Off-Road
* Cold Air Intake
* Differential Covers
* Engine and Transmission
* Exhaust
* Fuel Systems
* Ignition and Electrical
* Jerry Cans
* Off Road Carburetors
* Shifters and Handles
* Spare Tire Spacer
* XDR Off Road
* View All
* AC and Heating
* Categories / AC and Heating
* *
AC Condensors and Evaporators
*
Air Conditioning Components
*
Air Conditioning Systems
*
Blower Motor
Also in AC and Heating
* Controls and Cables
* Filler and Delete Panels
* Heater Box and Hoses
* Heater Core
* View All
* EV Conversions
* Categories / EV Conversions
* *
Battery Management (BMS)
*
CAN Bus Expansion
*
Combined Charging (CCU)
*
Digital CAN Keypads
Also in EV Conversions
* Conversion Brackets and Accessories
* Displays
* High Voltage Contactors
* High Voltage Disconnects
* Power Distribution (PDU)
* Sensors, Connectors, and Accessories
* Vehicle Controls (VCU)
* Wiring Harnesses
* View All
* Plumbing AN Fittings and Hose
* Categories / Plumbing AN Fittings and Hose
* *
Vapor Guard
*
Earls Classic Hose and Hose Ends
*
Speed-Seal and Speed-Flex
*
Hardline
Also in Plumbing AN Fittings and Hose
* Adapters
* All Hose Groups
* Application Specific Parts
* Catch Tanks
* Fuel System Components
* Hose Ends
* Hose Protection, Sleeving & Clamps
* Mr Gasket Push-On
* Mr Gasket Swivel
* Oil & Cooling Systems
* Plumbing Tools
* Power Steering
* Premade Hoses
* Seals
* Super Stock
* Ultra Flex
* UltraPro
* Valves
* Weld-ons and Fill Caps
* View All
* Brakes
* Categories / Brakes
* *
Front Big Brake Kits
*
Rear Big Brake Kits
*
Disc Brake Conversions
*
Replacement Brake Parts
Also in Brakes
* Baer Sport
* Brake Accessories
* Eradispeed
* Hydraulic Brake Conversion
* Master Cylinder Conversions
* Proportioning Valve
* Remaster Adjustable Proportioning Valve
* Remaster Master Cylinder
* Roll Control & Launch Control
* View All
* Fasteners and Hardware
* Categories / Fasteners and Hardware
* *
Body Hardware and Plugs
*
Engine Fasteners and Hardware
*
Hood Pin Kits
*
Magnetic Fasteners
Also in Fasteners and Hardware
* Quarter Turn Fasteners
* Safety Wire
* Transmission and Drivetrain
* Wheel and Tire
* View All
* Restoration
* Categories / Restoration
* *
Body & Rust Repair
*
Exterior & Trim
*
Emblems & Badges
*
Interior
Also in Restoration
* Air Conditioning and Heating
* Air and Fuel Delivery
* Books, Manuals & Brochures
* Brakes
* Bumper
* Convertible Tops and Components
* Cooling
* Decals Labels & Tags
* Electrical
* Engine & Transmission Mounting
* Exhaust
* Fender Covers
* Fuel Tanks & Components
* Ignition
* Lamps & Lighting
* Longbed to Shortbed Conversion Kits
* Radios & Stereos
* Suspension & Steering
* Trailer Hitches
* Transmission & Drivetrain
* Weatherstrip & Rubber
* Wheels & Accessories
* Windows & Windshield
* Wood Bed Floor and Trim
* View All
* Carburetors
* Categories / Carburetors
* *
Street
*
Performance and Race
*
Professional Race
*
Marine Carburetors
Also in Carburetors
* Carburetor Tools
* Carburetor and Manifold Combos
* Factory Refurbished Carburetors
* Performance 2 Barrels
* Specialty Carburetors
* View All
* Gaskets
* Categories / Gaskets
* *
Header Gaskets
*
Other Gaskets
*
Carburetor Gaskets
*
Collector Gaskets
Also in Gaskets
* Differential Cover Gaskets
* Gasket Kits
* Gasket Material
* Head Gaskets
* Intake Gaskets
* Oil Pan Gaskets
* RTV and Sealants
* Seals
* Supercharger Gaskets
* Timing Cover Gaskets
* Transmission Gaskets
* Valve Cover Gaskets
* View All
* Safety Equipment
* Categories / Safety Equipment
* *
Harnesses
*
Helmets
*
Racing Suits
*
Gloves
Also in Safety Equipment
* Aprons
* Arm Restraints
* Chest and Rib Protectors
* Cleaners
* Drag Parachutes
* Equipment Bags
* Head and Neck Restraints
* Seats
* Shifter Boots
* Shoes
* Tow Straps
* Undergarments
* Window Nets
* Youth
* View All
* Cataclean
* Categories / Cataclean
* *
Cataclean - Fuel and Exhaust System Cleaner
*
Motorcycle and Powersports
* Gauges and Gauge Accessories
* Categories / Gauges and Gauge Accessories
* *
Digital Displays and Touchscreens
*
Gauge Sets
*
Analog Gauges
*
Digital Gauges
Also in Gauges and Gauge Accessories
* Gauge Accessories and Harnesses
* Gauge Adapters and Fittings
* Shift Lights
* Tach Adapters
* View All
* Suspension & Chassis
* Categories / Suspension & Chassis
* *
Suspension Packages
*
Ball Joints
*
Steering Components
*
Control Arms
Also in Suspension & Chassis
* Air Ride
* Body Mounts and Hardware
* C-Notch Kits
* Driveshaft Safety Loops
* Front Drop Axles & Kingpins
* Hitches and Towing
* Leveling and Lift Kits
* Longbed to Shortbed Conversion Kits
* Roll Cage Kits
* Shocks and Struts
* Springs & Bumpstops
* Strut Tower and Chassis Braces
* Sway Bars and Components
* Traction Bars and Components
* View All
* Cooling
* Categories / Cooling
* *
Water Pumps and Accessories
*
Radiators and Accessories
*
Fans & Accessories
*
Wiring Harnesses and Relays
Also in Cooling
* Fan Mounting Solutions
* Hose Sleeving
* Intercoolers
* Oil And Transmission Coolers
* Thermostats
* Water Outlets
* View All
* Ignition
* Categories / Ignition
* *
Tune Up Kits
*
Ignition Boxes
*
Distributors
*
HyperSpark Ignition for Sniper EFI
Also in Ignition
* Crank Triggers
* Electronic Conversion Kits
* Heat Shielding
* Ignition Coils
* Ignition Harnesses
* Ignition and Electrical Components
* Magnetos
* RPM & Timing Controls
* Smart Coil and Components
* Spark Plug Wires
* Spark Plugs
* View All
* Tools, Shop Equipment & Chemicals
* Categories / Tools, Shop Equipment & Chemicals
* *
Plumbing Tools
*
Ignition Tools and Testers
*
Safety Wire
*
Carburetor Tools
Also in Tools, Shop Equipment & Chemicals
* Diagnostic Tools
* Engine Tools
* Extra Long Fender Covers
* Fender Covers
* Fluid Tools
* Front End Covers
* Hand Tools
* Jumbo Fender Covers
* Oils, Fluids, & Additives
* Paint & Dye
* Shop Tools
* Trailer Tools
* View All
* Data Acquisition
* Categories / Data Acquisition
* *
Shop by Motorsport
*
Vantage
*
Data Loggers
*
Digital Dashes
Also in Data Acquisition
* Cables
* Modules
* Power Distribution Modules
* Sensors
* Sensors With Modules
* Wiring Accessories
* View All
* Intake Manifolds
* Categories / Intake Manifolds
* *
Carbureted Intake Manifolds
*
Carburetor and Manifold Combos
*
EFI Intake Manifolds
*
Installation Parts and Accessories
Also in Intake Manifolds
* Roots Supercharger Intake Manifolds
* View All
* Transmission & Drivetrain
* Categories / Transmission & Drivetrain
* *
Bellhousings and Accessories
*
Clutches and Flywheels
*
Shifters
*
Torque Converters and Flexplates
Also in Transmission & Drivetrain
* Internal Components
* Rear Axle & Differential
* Transmission Controller
* Transmission Coolers
* Transmission Mounts
* Transmission Pans and Dipsticks
* Transmission Swap Parts
* Transmissions
* View All
* EFI - Fuel Injection
* Categories / EFI - Fuel Injection
* *
Sniper EFI
*
Terminator X
*
HP EFI
*
Dominator EFI
Also in EFI - Fuel Injection
* AEM EFI
* Atomic EFI
* EFI Distributors
* EFI Fuel System Components
* Gauges and Displays
* Harnesses
* Hilborn EFI and MFI Systems
* Hilborn Service Components
* Injectors
* Legacy EFI
* Modules and Sensors
* Terminator EFI
* Throttle Bodies
* Wiring Shop
* View All
* Interior
* Categories / Interior
* *
Audio Components
*
Carpet
*
Console
*
Custom Interior
Also in Interior
* Dash
* Door
* Floor Mats
* Gauges
* Glove Box
* Headliners and Components
* Horn
* Instrument Panels and Components
* Lights
* Pedals and Pedal Pads
* Rear View Mirror
* Seat
* Seatbelt
* Steering Wheels
* Sunvisor And Components
* Trim
* Trunk
* View All
* Tuners and Programmers
* Categories / Tuners and Programmers
* *
Handheld Tuners
*
In-Cabin Tuners and Monitors
*
AFM and DFM
*
Start/Stop Disabler
Also in Tuners and Programmers
* Accessories
* Amp'd Throttle Booster
* Dinan Software-Tuning
* Inline Tuning Modules
* PCM
* View All
* Electrical
* Categories / Electrical
* *
Alternators
*
Corvette & Camaro Headlight Kits
*
Starters
*
Wiring and Relays
Also in Electrical
* CAN Bus Expansion
* Connectors
* Door Jamb Boots
* Electrical System Accessories
* Harnesses
* Ignition Switches
* LED Lighting
* Pins and Seals
* Power Distribution
* Selecta-Speed Wiper Kits
* Sensors
* Starter Accessories
* Switches and Parts
* Wire Loom
* Wire and Cable
* Wiring Tools
* View All
* Lighting
* Categories / Lighting
* *
Mounts and Accessories
*
Fog Lights
*
Headlights
*
LED Cube Lights
Also in Lighting
* Bezels and Trim
* LED Light Bars
* Marker and Signal Lamps
* Tail Lights
* View All
* Wheels and Wheel Accessories
* Categories / Wheels and Wheel Accessories
* *
Wheels
*
Wheel Accessories
* Brands
* Brands
* ACCEL
* DiabloSport
* Holley RetroBright
* REKUDO
* ADS
* Dinan
* Hooker
* Rev Wheels
* AEM
* Drake Muscle Cars
* Hooker BlackHeart
* Rocket Racing Wheels
* AEM EV
* Earl's
* Hurst
* Scott Drake
* Amp'd
* Edge
* Lakewood
* Simpson Motorcycle
* Anvil Off-Road
* Fender Gripper
* Legendary Wheels
* Simpson Racing
* APR
* Flowmaster
* Mallory
* Sniper
* B&M
* Flowmonster
* Mr. Gasket
* SPAL Fans
* Baer Brakes
* Flowtech Exhaust
* MSD
* Speartech
* Brawler
* Frostbite Cooling
* NOS
* Stilo
* Bright Earth
* Garrett Turbochargers
* ProConnect
* Street Fire
* Brothers Trucks
* Halibrand
* Proforged
* Superchips
* Carroll Shelby Wheels
* HANS
* Pulsar
* Weiand
* CataClean
* Hays
* Quick Fuel Technology
* White Box
* Classic Instruments
* Hilborn
* Quick Time
* XDR
* Demon
* HK Wheels
* Racepak
*
* Detroit Speed
* Holley
* RaceQuip
*
* DeWitts
* Holley EFI
* Range Technology
*
* Shop By Vehicle
* Shop By Vehicle
* MakeGMCJeepToyotaRamDodgeFordChevrolet ACAcuraAM GeneralAmerican
MotorsArctic CatAston
MartinAudiAvantiBentleyBMWBricklinBuellBuickCadillacCan-AmCheckerChevroletChryslerDatsunDeTomasoDodgeDucatiE-TONEagleEdselErik
Buell
RacingExcaliburExcelsior-HendersonFargoFAWFerrariFiatFiskerFordFotonFreightlinerGas
GasGEMGenesisGiant MotorsGMCHarley
DavidsonHMHondaHummerHusabergHusqvarnaHyosungHyundaiIndianINFINITIInternationalIsoIsuzuItalikaJACJaguarJeepJensenJMCJohn
DeereKarmaKaseaKawasakiKeewayKiaKTMKubotaKYMCOLaforzaLamborghiniLanciaLand
RoverLEMLexusLincolnLotusLucidLynxMahindraMarcosMaseratiMastrettaMaybachMazdaMcLarenMercedes-BenzMercuryMerkurMGMiniMitsubishiMobility
VenturesMonteverdiMorganMorrisMoto GuzziMoto-SkiMV AgustaNashNew
HollandNissanNSUODESOldsmobileOpelPanozPantherPeugeotPiaggioPlymouthPolarisPolestarPoliniPontiacPorscheQvaleRamRedcat
MotorsRedlineReliantRenaultRivianRolls-RoyceRoverRoyal
EnfieldRuppSaabSaleenSaturnScionSDGSea-DooSeatShelbyShercoSimcaSki-DooSmartSno-JetSpykerSRTSsangYongStudebakerStutzSubaruSunbeamSuzukiTeslaTextronTGBThinkTigerSharkTMToyotaTrackerTriumphTVRUAZVAMVentoVespaVictoryVolkswagenVolvoVORVPGWorkhorseYamahaZacuaZERO
Model
Year
Go
Clear
* Deals
ASK OUR EXPERTS
1-888-258-3835
MENU
Categories
Brands
Shop By Vehicle
Deals
Motor Life
Events
Community
Support
Log In
Log Out
1-888-258-3835
Ask our Experts, we're here to help!
Monday - Friday 8AM - 5PM CST
Saturday 8AM - 2PM CST
* New & Hot Products
* Clearance
* Air & Fuel Delivery
* Apparel & Collectibles
* AC and Heating
* Brakes
* Carburetors
* Cataclean
* Cooling
* Data Acquisition
* EFI - Fuel Injection
* Electrical
* Engine
* Engine Swap Parts
* Exhaust
* Exterior
* EV Conversions
* Fasteners and Hardware
* Gaskets
* Gauges and Gauge Accessories
* Ignition
* Intake Manifolds
* Interior
* Lighting
* LS Power
* Marine and Powersports
* Nitrous
* Off-Road
* Plumbing AN Fittings and Hose
* Restoration
* Safety Equipment
* Suspension & Chassis
* Tools, Shop Equipment & Chemicals
* Transmission & Drivetrain
* Tuners and Programmers
* Wheels and Wheel Accessories
* EFI - Fuel Injection
* Carburetors
* Carburetor Components
* Fuel Pumps Regulators and Filters
* Air Cleaners
* Air Scoops
* Cold Air Intake
* Fuel System Kits
* Fuel Tanks and Fuel Cells
* HydraMat
* View All
* Back to School
* Limited Edition
* Holley Collection
* Shirts
* Backpacks
* Banners
* Clocks
* Decals
* Diecast
* Drinkware
* Face Masks & Gaiters
* Headwear
* Hitch Cover
* Hoodies
* Jackets
* Ladies Apparel
* Literature
* Metal Signs
* Misc
* Pet Accessories
* Polo Shirts
* Sunglasses
* Tote Bags
* Youth Apparel
* View All
* AC Condensors and Evaporators
* Air Conditioning Components
* Air Conditioning Systems
* Blower Motor
* Controls and Cables
* Filler and Delete Panels
* Heater Box and Hoses
* Heater Core
* View All
* Front Big Brake Kits
* Rear Big Brake Kits
* Disc Brake Conversions
* Replacement Brake Parts
* Baer Sport
* Brake Accessories
* Eradispeed
* Hydraulic Brake Conversion
* Master Cylinder Conversions
* Proportioning Valve
* Remaster Adjustable Proportioning Valve
* Remaster Master Cylinder
* Roll Control & Launch Control
* View All
* Street
* Performance and Race
* Professional Race
* Marine Carburetors
* Carburetor Tools
* Carburetor and Manifold Combos
* Factory Refurbished Carburetors
* Performance 2 Barrels
* Specialty Carburetors
* View All
* Cataclean - Fuel and Exhaust System Cleaner
* Motorcycle and Powersports
* View All
* Water Pumps and Accessories
* Radiators and Accessories
* Fans & Accessories
* Wiring Harnesses and Relays
* Fan Mounting Solutions
* Hose Sleeving
* Intercoolers
* Oil And Transmission Coolers
* Thermostats
* Water Outlets
* View All
* Shop by Motorsport
* Vantage
* Data Loggers
* Digital Dashes
* Cables
* Modules
* Power Distribution Modules
* Sensors
* Sensors With Modules
* Wiring Accessories
* View All
* Sniper EFI
* Terminator X
* HP EFI
* Dominator EFI
* AEM EFI
* Atomic EFI
* EFI Distributors
* EFI Fuel System Components
* Gauges and Displays
* Harnesses
* Hilborn EFI and MFI Systems
* Hilborn Service Components
* Injectors
* Legacy EFI
* Modules and Sensors
* Terminator EFI
* Throttle Bodies
* Wiring Shop
* View All
* Alternators
* Corvette & Camaro Headlight Kits
* Starters
* Wiring and Relays
* CAN Bus Expansion
* Connectors
* Door Jamb Boots
* Electrical System Accessories
* Harnesses
* Ignition Switches
* LED Lighting
* Pins and Seals
* Power Distribution
* Selecta-Speed Wiper Kits
* Sensors
* Starter Accessories
* Switches and Parts
* Wire Loom
* Wire and Cable
* Wiring Tools
* View All
* Accessory Drive Brackets and Kits
* Intake Manifolds
* Oil Pans
* Oil Pumps
* Air Cleaners
* Crate Engines
* Engine Dress Up
* Engine Mounts
* Forced Induction
* Harmonic Balancers
* Timing Covers
* Valley Covers
* Valve Covers
* Valvetrain
* View All
* LS Swap Systems
* Gen-V LT Swap Systems
* Coyote Swap Systems
* Godzilla Swap Systems
* Accessory Drive Brackets and Kits
* Exhaust Systems
* Gen III Hemi Swap Systems
* Mounts and Crossmembers
* Swap Accessories
* View All
* Exhaust Systems
* Headers and Exhaust Manifolds
* Performance Mufflers
* Catalytic Converters
* Builder Components
* Cut-Outs and Multi-Mode Kits
* Exhaust Tips
* X Pipes Y Pipes and H Pipes
* View All
* Long Bed to Short Bed Conversions
* Bed Mats
* Bumpers
* Car Covers
* Convertible Tops and Components
* Decklid Panels
* Doors
* Fenders
* Firewall, Cowl, and Front Unibody
* Floor Pan and Frame
* Fuel Doors
* Graphic Kits
* Grilles
* Hood
* Lighting
* Mini Tub Kits
* Plate Frames and Accessories
* Quarter Panels
* Radiator Supports
* Rear Spoilers
* Rocker Panel
* Roof Panel
* Trim and Moldings
* Truck Bed & Parts
* Truck Cab & Parts
* Valances
* Weatherstrip
* Window and Windshield
* View All
* Battery Management (BMS)
* CAN Bus Expansion
* Combined Charging (CCU)
* Digital CAN Keypads
* Conversion Brackets and Accessories
* Displays
* High Voltage Contactors
* High Voltage Disconnects
* Power Distribution (PDU)
* Sensors, Connectors, and Accessories
* Vehicle Controls (VCU)
* Wiring Harnesses
* View All
* Body Hardware and Plugs
* Engine Fasteners and Hardware
* Hood Pin Kits
* Magnetic Fasteners
* Quarter Turn Fasteners
* Safety Wire
* Transmission and Drivetrain
* Wheel and Tire
* View All
* Header Gaskets
* Other Gaskets
* Carburetor Gaskets
* Collector Gaskets
* Differential Cover Gaskets
* Gasket Kits
* Gasket Material
* Head Gaskets
* Intake Gaskets
* Oil Pan Gaskets
* RTV and Sealants
* Seals
* Supercharger Gaskets
* Timing Cover Gaskets
* Transmission Gaskets
* Valve Cover Gaskets
* View All
* Digital Displays and Touchscreens
* Gauge Sets
* Analog Gauges
* Digital Gauges
* Gauge Accessories and Harnesses
* Gauge Adapters and Fittings
* Shift Lights
* Tach Adapters
* View All
* Tune Up Kits
* Ignition Boxes
* Distributors
* HyperSpark Ignition for Sniper EFI
* Crank Triggers
* Electronic Conversion Kits
* Heat Shielding
* Ignition Coils
* Ignition Harnesses
* Ignition and Electrical Components
* Magnetos
* RPM & Timing Controls
* Smart Coil and Components
* Spark Plug Wires
* Spark Plugs
* View All
* Carbureted Intake Manifolds
* Carburetor and Manifold Combos
* EFI Intake Manifolds
* Installation Parts and Accessories
* Roots Supercharger Intake Manifolds
* View All
* Audio Components
* Carpet
* Console
* Custom Interior
* Dash
* Door
* Floor Mats
* Gauges
* Glove Box
* Headliners and Components
* Horn
* Instrument Panels and Components
* Lights
* Pedals and Pedal Pads
* Rear View Mirror
* Seat
* Seatbelt
* Steering Wheels
* Sunvisor And Components
* Trim
* Trunk
* View All
* Mounts and Accessories
* Fog Lights
* Headlights
* LED Cube Lights
* Bezels and Trim
* LED Light Bars
* Marker and Signal Lamps
* Tail Lights
* View All
* LS Swap Systems
* LS EFI Systems
* LS Intakes
* LS Exhaust
* EFI Components
* Engine and Transmission mounts
* Fuel Pump Regulator and Filter
* Fuel Tanks
* LS Accessory Drive Brackets and Kits
* LS Drivetrain
* LS Engine Components
* LS Gaskets
* LS Ignition Products
* LS Swap Oil Pans
* LS Swap Radiators
* LS Throttle Bodies
* LS Tools
* LS Valve Covers & Engine Appearance
* LS and LT Nitrous Systems
* View All
* Marine
* Motorcycle
* UTV
* ATV
* Personal Watercraft
* Small Engine
* View All
* EFI Systems
* Carbureted Plate Systems
* Diesel Systems
* Powersport Systems
* Bottles and Accessories
* Controllers and Accessories
* Direct Port Systems
* Distribution Blocks, Filters, Adapters and Fittings
* Electrical and Wiring
* Fuel Pumps and Regulators
* Gauges
* Hose Lines and Tubing
* Intercooler Sprayers
* Microswitch and Solenoid Mounting Brackets
* NOS Jets
* Nitrous Blowdown Hoses and Tubes
* Nitrous Plates
* Nozzles
* Purge Kits
* Refill Kits and Components
* Solenoids and Solenoid Service Parts
* Tools
* View All
* Leveling & Lift Kits
* Off-Road Lighting
* Seats
* Winches and Recovery
* Cold Air Intake
* Differential Covers
* Engine and Transmission
* Exhaust
* Fuel Systems
* Ignition and Electrical
* Jerry Cans
* Off Road Carburetors
* Shifters and Handles
* Spare Tire Spacer
* XDR Off Road
* View All
* Vapor Guard
* Earls Classic Hose and Hose Ends
* Speed-Seal and Speed-Flex
* Hardline
* Adapters
* All Hose Groups
* Application Specific Parts
* Catch Tanks
* Fuel System Components
* Hose Ends
* Hose Protection, Sleeving & Clamps
* Mr Gasket Push-On
* Mr Gasket Swivel
* Oil & Cooling Systems
* Plumbing Tools
* Power Steering
* Premade Hoses
* Seals
* Super Stock
* Ultra Flex
* UltraPro
* Valves
* Weld-ons and Fill Caps
* View All
* Body & Rust Repair
* Exterior & Trim
* Emblems & Badges
* Interior
* Air Conditioning and Heating
* Air and Fuel Delivery
* Books, Manuals & Brochures
* Brakes
* Bumper
* Convertible Tops and Components
* Cooling
* Decals Labels & Tags
* Electrical
* Engine & Transmission Mounting
* Exhaust
* Fender Covers
* Fuel Tanks & Components
* Ignition
* Lamps & Lighting
* Longbed to Shortbed Conversion Kits
* Radios & Stereos
* Suspension & Steering
* Trailer Hitches
* Transmission & Drivetrain
* Weatherstrip & Rubber
* Wheels & Accessories
* Windows & Windshield
* Wood Bed Floor and Trim
* View All
* Harnesses
* Helmets
* Racing Suits
* Gloves
* Aprons
* Arm Restraints
* Chest and Rib Protectors
* Cleaners
* Drag Parachutes
* Equipment Bags
* Head and Neck Restraints
* Seats
* Shifter Boots
* Shoes
* Tow Straps
* Undergarments
* Window Nets
* Youth
* View All
* Suspension Packages
* Ball Joints
* Steering Components
* Control Arms
* Air Ride
* Body Mounts and Hardware
* C-Notch Kits
* Driveshaft Safety Loops
* Front Drop Axles & Kingpins
* Hitches and Towing
* Leveling and Lift Kits
* Longbed to Shortbed Conversion Kits
* Roll Cage Kits
* Shocks and Struts
* Springs & Bumpstops
* Strut Tower and Chassis Braces
* Sway Bars and Components
* Traction Bars and Components
* View All
* Plumbing Tools
* Ignition Tools and Testers
* Safety Wire
* Carburetor Tools
* Diagnostic Tools
* Engine Tools
* Extra Long Fender Covers
* Fender Covers
* Fluid Tools
* Front End Covers
* Hand Tools
* Jumbo Fender Covers
* Oils, Fluids, & Additives
* Paint & Dye
* Shop Tools
* Trailer Tools
* View All
* Bellhousings and Accessories
* Clutches and Flywheels
* Shifters
* Torque Converters and Flexplates
* Internal Components
* Rear Axle & Differential
* Transmission Controller
* Transmission Coolers
* Transmission Mounts
* Transmission Pans and Dipsticks
* Transmission Swap Parts
* Transmissions
* View All
* Handheld Tuners
* In-Cabin Tuners and Monitors
* AFM and DFM
* Start/Stop Disabler
* Accessories
* Amp'd Throttle Booster
* Dinan Software-Tuning
* Inline Tuning Modules
* PCM
* View All
* Wheels
* Wheel Accessories
* View All
* ACCEL
* ADS
* AEM
* AEM EV
* Amp'd
* Anvil Off-Road
* APR
* B&M
* Baer Brakes
* Brawler
* Bright Earth
* Brothers Trucks
* Carroll Shelby Wheels
* CataClean
* Classic Instruments
* Demon
* Detroit Speed
* DeWitts
* DiabloSport
* Dinan
* Drake Muscle Cars
* Earl's
* Edge
* Fender Gripper
* Flowmaster
* Flowmonster
* Flowtech Exhaust
* Frostbite Cooling
* Garrett Turbochargers
* Halibrand
* HANS
* Hays
* Hilborn
* HK Wheels
* Holley
* Holley EFI
* Holley RetroBright
* Hooker
* Hooker BlackHeart
* Hurst
* Lakewood
* Legendary Wheels
* Mallory
* Mr. Gasket
* MSD
* NOS
* ProConnect
* Proforged
* Pulsar
* Quick Fuel Technology
* Quick Time
* Racepak
* RaceQuip
* Range Technology
* REKUDO
* Rev Wheels
* Rocket Racing Wheels
* Scott Drake
* Simpson Motorcycle
* Simpson Racing
* Sniper
* SPAL Fans
* Speartech
* Stilo
* Street Fire
* Superchips
* Weiand
* White Box
* XDR
What Are You Working On?
MAKEGMCJeepToyotaRamDodgeFordChevrolet ACAcuraAM GeneralAmerican MotorsArctic
CatAston
MartinAudiAvantiBentleyBMWBricklinBuellBuickCadillacCan-AmCheckerChevroletChryslerDatsunDeTomasoDodgeDucatiE-TONEagleEdselErik
Buell
RacingExcaliburExcelsior-HendersonFargoFAWFerrariFiatFiskerFordFotonFreightlinerGas
GasGEMGenesisGiant MotorsGMCHarley
DavidsonHMHondaHummerHusabergHusqvarnaHyosungHyundaiIndianINFINITIInternationalIsoIsuzuItalikaJACJaguarJeepJensenJMCJohn
DeereKarmaKaseaKawasakiKeewayKiaKTMKubotaKYMCOLaforzaLamborghiniLanciaLand
RoverLEMLexusLincolnLotusLucidLynxMahindraMarcosMaseratiMastrettaMaybachMazdaMcLarenMercedes-BenzMercuryMerkurMGMiniMitsubishiMobility
VenturesMonteverdiMorganMorrisMoto GuzziMoto-SkiMV AgustaNashNew
HollandNissanNSUODESOldsmobileOpelPanozPantherPeugeotPiaggioPlymouthPolarisPolestarPoliniPontiacPorscheQvaleRamRedcat
MotorsRedlineReliantRenaultRivianRolls-RoyceRoverRoyal
EnfieldRuppSaabSaleenSaturnScionSDGSea-DooSeatShelbyShercoSimcaSki-DooSmartSno-JetSpykerSRTSsangYongStudebakerStutzSubaruSunbeamSuzukiTeslaTextronTGBThinkTigerSharkTMToyotaTrackerTriumphTVRUAZVAMVentoVespaVictoryVolkswagenVolvoVORVPGWorkhorseYamahaZacuaZERO
MODEL
YEAR
Go
IGNITION TECHNICAL SUPPORT
* Home /
* Support /
* Ignition
TECHNICAL RESOURCES
IGNITION BASICS
MSD Coil Packs Provide Improved Ignition Capability For Late-Model Engines
MSD's LS Series Ignition Controller Means LS Swaps and a Carburetor Too
MSD Ignition's Solid State Relays Simplify Your Wiring Layout
Upgrade Your MSD Atomic 2 EFI System With These Great Add-Ons
MSD's New Smart Coil And Big Wire Kit Delivers!
MSD Ignition's Pro 600 Capacitive Discharge Ignition Powers The Racing World's
Toughest Engines
How Does a Dual Sync Distributor Work and When Do You Need One?
Go In-Depth Inside MSD's High-Tech Power Grid Ignition System
MSD’s New & Improved Atomic 2 EFI System Offers EFI Drivability with Simple
Installation
Upgrade your Import’s Coil-On Plug Ignition System with Accel Super Coils
How to Solve Ignition Problems with MSD’s Universal Ignition Tester
How Ignition Timing Works: Vacuum and Mechanical Advance Explained
How to Use MSD’s Ignition Tester
How to Correctly Install and Troubleshoot your MSD Digital 6AL Ignition Box
How To Build A Custom Timing Table - Sniper EFI
Terminator X for Ford Part 2: Installing MSD Pro 600 & Cam Sync on Small Block
Ford
Sniper EFI Ignition Systems Overview
How To Set Ignition Timing With A Distributor
How To: Find Top Dead Center
Sniper EFI Hyperspark Install
Using the MSD Pro 600 CDI with Holley EFI
How to install the easy to use Sniper EFI Hyper Spark Ignition System
Universal Wire Set Installation Instructions
Import Vehicles
MSD Troubleshooting Techniques
Magnetic Pickup in the distributor
Tachometer Operation
Engine Run On
Modifying AMC oiling for performance
Secrets to Successfully Using an MSD Magnetic and Non-Magnetic Pickup
MSD Tech: Coil and Spark Plug Wire Troubleshooting
Distributor Operation
Capacitive Discharge Ignitions
MSD Tech: Distributor Troubleshooting
Spark Plugs
Spark Plug Wires
Battery
MSD Tech: Ignition Troubleshooting
How to test for spark on your MSD 6 Series
"Installing a Distributor", a How To Video from Mallory
5462 To Mallory Unilite
See More
Tech Notes
Wiring Diagrams and Tech Notes
Provides over 150 pages of diagrams and details on MSD's ignition line
Updated - 2014-01-01
Top Ten Ignition Questions
MSD View Software
Driver Installation in Windows 8
Step-by-step instructions on driver installation in Windows 8
Driver Installation in Windows 8.1
Step-by-step instructions on driver installation in Windows 8.1
MSD View Software
MSD View version 4.5.8.exe Software for use with Power Grid System
Updated - 2021-05-11
MSD Pro-Data+/GraphView Software
Driver Installation in Windows 8
Step-by-step instructions on driver installation in Windows 8
Driver Installation in Windows 8.1
Step-by-step instructions on driver installation in Windows 8.1
MSD GraphSave Software
View, modify and save user data for all MSD Digital Programmable products.
MSD Pro-Data+ Software
MSD Pro-Data+ Software for use with all MSD Digital Programmable products.
Powersports Software
Powersports Pro-Data+ Software
Powersports Pro-Data+ Software for use with Powersports Digital Programmable
products.
Powersports View Software
MSD View Software for use with for Powersports part numbers 4244, 4245, 4248 and
4247.
Application Guides
MSD Spark Plug Dimensions
MSD spark plug dimensions reference guide.
Spark Plug Cross Reference Guide
MSD Cross Reference with NGK® Stock Number to Plug Type
Spark Plug Torque Specs
Recommended Spark Plug Torque Specifications
Spark Plug Failure Guide
Quick Reference Plug Failure Guide
Spark Plug Application Guide
Spark Plug Application Guide for Aftermarket Cylinder Heads
Spark Plug Terminal and Boot Attachment
Simple steps to follow while installing spark plug wires - Prevent Breakdowns
Updated - 2011-12-01
MSD Spark Plug Application Guide
2014 SPARK PLUG CATALOG AND APPLICATION GUIDE
Updated - 2014-01-01
HOW TO TEST FOR SPARK ON YOUR MSD 6 SERIES
FAQ'S
* What is the Test procedure for checking my Unilite electronic ignition
module’s operation?
INSTRUCTIONS
* Remove both the distributor cap and rotor, then turn the ignition ON but
DO NOT START car.
* Now connect your Red voltmeter wire to the NEGATIVE terminal (-) on the
coil, by attaching the Red lead wire clip from voltmeter to the (-)
terminal.
* Next attach your Black voltmeter wire to an engine ground on a good ground
source. We suggest a manifold, or header bolt. Most anywhere on the engine
is good.
* Now the voltage should read about 11 to 12 volts at this point. Remember
to turn the key on for this reading! 12 volts must be present on your
voltmeter.
* Next, place a credit card down into the distributor, blocking the 2 photo
optic eyes on top the module facing each other on the top. With eyes
blocked, the volts should drop way down below 2 volts or less. This drop
is a must! If the voltage drops down to anything under 2 volts, then the
module is good and ready to use. If the voltage does NOT drop, the module
will need to be replaced.
* This damage could have been caused by many things, such as: power surge
from an alternator, high resistance spark plugs and plug wires, improper
ground wires, if someone has given you a jump, if you have given someone a
jump, or battery chargers, which can also damage ignition modules. If
voltage always stays below 2 volts and never increases up to 11-12 volts,
then the module has been spiked by high voltage and needs to be replaced.
NOTE: The lack of a ballast resistor will cause this type of spike. If the
voltage only drops down to 3-4 volts, this will produce a weak spark: too
weak to run engine and the module will need to be replaced.
Helpful?
* What coil should I use for my Mallory Unilite distributor, and/or Mallory
Hyfire CD ignition box?
All Unilite distributors need coils with a minimum amount of 1.4 Ohms primary
resistance. Coils are 12 volts; however, they do have different amounts of
primary resistance, which is measured in Ohms. You can still use a coil with
less than 1.4 Ohms, but you must install a Ballast Resistor (Mallory #700)
between the coil and the distributor, install on Red wire coming out of the
Unilite distributor. It is Important to know that the Unilite distributor
will work initially on the engine with less than 1.4 Ohm, BUT NOT FOR LONG.
It only takes a short period of time to burn up the module using a coil with
the wrong resistance.
When you select a coil for any High power CD ignition box like the Mallory
Hyfire CD boxes, the Mallory Hyfire CD boxes MUST always use a coil with LESS
than 1 Ohm of primary resistance.
Helpful?
* Where do I need to connect the 3 colored wires (Red, Green and Brown) on a
Unilite distributor?
The Green wire connects to the Negative (-) coil terminal. The Red wire
connects to the Positive (+) coil terminal, and the Brown wire connects to a
good engine ground. The brown wire must be ground to the engine.
Helpful?
* Does Mallory sell an electronic distributor conversion kit to do away with my
points set up?
YES, there are two (2) choices of kits to choose from when purchasing our
conversion kit. First, you will need to know what kind of distributor you
have now. If it is a Mallory, we will need the Mallory Part number #. The
kits are called "E-Spark" conversion kits or "Unilite" conversion kits.
Helpful?
* What is the part number for the Unilite distributor replacement ignition
module?
There are two modules that are available. The first is Mallory part # 605,
and the second is Mallory part # 6100M. Both come with a 1 year warranty.
Helpful?
* Why is my Mallory electric fuel pump fluctuating in pressure and jumping all
over?
There are many things that could cause this issue. The top offenders include
using the wrong size fuel pressure regulator, not using a return line, or
having a return line that is too small. Other causes could include using too
many 90° degree elbows, an improperly sized fuel pump is the wrong size for
the engine Horsepower or using a return line out of the pump.
Helpful?
* Can I buy parts like bushings, shafts & springs for my distributor and
rebuild it myself?
The only service parts available are Caps, Rotors, Modules, Gears, and Curve
Kits. If you need more than this, you’ll need to send distributor to us, for
a FREE estimate on a repair price. Please complete and include the repair
form found on our site.
Helpful?
* What is the Replacement Ignition Module and pick up coil for my Mallory HEI
distributor?
There are two types of Mallory HEI Distributors: 75 series and 85 series
units. The 75 series HEI uses a Module with a Rev-limiter - Module Part #699.
The 85 series HEI uses the Module Part #607.
NOTE: Pick-up coils for the HEI distributors are NOT available as replacement
parts.
Helpful?
* What’s the part number for replacement cap and rotor on my Mallory Comp 9000
distributor?
The Comp 9000 distributors is an older design that we sold prior to the
UNILITE. The replacement cap and rotors are available for sale and must be
bought to match the distributor part number #. If you contact us with your
distributor part number we can match the cap and rotor to his Comp 9000
distributor.
Helpful?
* What spark plug gap should I use when using the ACCEL HEI coil?
.045 is a good starting point. Check your plugs after 100 miles of driving.
The white porcelain around the electrode of a properly gapped plug should
have khaki tan coloration. If the plugs look black, close the gap by .005 to
.040. If the porcelain is white, open the gap by .005 to .050 to cool the
operating temperature of the plug.
Helpful?
* What is the difference between ACCEL coils PN 8140 and PN 8145ACC and should
I use a ballast resistor?
The ACCEL PN 8140 has 1.4 ohms primary resistance and will need a ballast
resistor when used with a point style distributor. The ACCEL PN 8145ACC has
0.7 ohms primary resistance and will require a ballast resistor when used
with a Mallory Unilite or Magnetic Breakerless Ignition Distributor.
Helpful?
* Do I use a ballast resistor with ACCEL Super Coil #140001?
Yes, you will need a ballast resistor when using ACCEL Super Coil #140001
with a Accel Points Conversion Kit, PN's 2010ACC, 2020, or Mallory Unilite or
Magnetic Breakerless Ignition Distributor. To use with a points style
distributor, additional resistance is needed to get to 3.0 OHMs.
Helpful?
* How do you adjust the ACCEL distributor’s vacuum advance timing?
Insert a 3/32 hex key into the vacuum port and turn clockwise to increase the
advance. Turn counterclockwise to reduce the vacuum advance.
Helpful?
* What ACCEL points eliminator kit do I need to convert an OEM point
distributor to electronic?
GM V8 1957-74: ACCEL PN 2010ACC Ford V8 1957-74: ACCEL PN 2020
Helpful?
* What ACCEL distributor will fit my GM Vortec V8?
ACCEL # 59132, ACCEL Performance Distributor - 96-00 Chevy Vortec V-8
Helpful?
* What HEI distributor coil do you recommend for my ACCEL HEI unit?
You will need to look at your original coil. If you have red and yellow OEM
primary wires, use ACCEL #140003. If you have red and white OEM primary
wires, use ACCEL #140005.
Helpful?
* Where do I return my ACCEL Opti-Spark II broken distributor for exchange?
Please refer to the “support” section of our website to fill out a repair
form. https://www.holley.com/support/warranty/
Helpful?
* How often should spark plug wires be replaced?
Spark plug wires are a consumable item like oil in the engine, they should be
changed on a frequent schedule that is determined by how often they run. A
routine schedule of cleaning, inspecting and checking the resistance of the
wires should be done as a routine maintenance program of the car. Some teams
even keep a logbook of the resistance of when the wires were built to compare
after running.
Some of the most common problems can come for the actual wire crimps that can
be resolved by re-crimping the terminals or replacing the terminal. The
terminals are designed as a conductor crimp so the conductor does not have to
be bent over which fracture or damage the conductor making it can read a
higher resistance than normal.
The resistance should be 40 to 50 ohms per foot once the measurement is noted
that value should not change. The only other facture that cannot be checked
is the outside jacket, other than cleaning and a visual inspection looking
for abrasion, cuts and pinholes, the jacket will deteriorate in time due to
the amount of energy being transferred through the wires.
The coil wire should be replaced often as it gets hit 8 times more than the
other wires. Big budget teams replace wire set about every third race while
most others would replace them every 6th to7th race. There really is no gauge
as to how often to replace wire set. Remember the wires are the actual
delivery system of the spark energy to the spark plug that will affect a
performance of the engine if not up to par.
Helpful?
* How often should coils be replaced?
This is a tough question to answer, there are only two reasons to replace
coils when one is "Open" or has a shorted winding. In either case most can be
found with a simple L.C.R. (Inductor, Capacitance and Resistance) meter.
Notice that there are several numbers inscribed on the back of all coils.
One set is the date code (which had been changed to an easier method to read)
and the second and third sets are the inductance values of the coils. In this
case the numerical value does not represent any form of performance like 709
vs. 899 these numbers are simply inductance values of the windings. These
numbers are used to monitor a change within the coil. Keep in mind that these
numbers are relative to the meters being used, several variables can account
for the values: coil temperature, lead length, and meter model and meter
frequency output. So if you purchase an LCR meter these numbers will differ
slightly from actual numbers on your coils. Once you acquire a meter it would
be wise to log these values and periodically check them to see if they have
changed. Theoretically, once a coil is built and has run successfully down
the track it should never fail unless due to exterior damages.
In the beginning (1994) our coils were capable of extremely high voltages.
The coils were capable of 55,000 volts to 60,000 volts as time passed we
found that these voltage capabilities were unnecessary and were resulting in
a high yield of coil failures prior to shipping. We redesigned the coils
limiting the output voltages to 45,000 volts, this resulted in cooler running
coils that were not capable of destroying themselves yielding higher
percentages of higher quality coils.
Prior to purchasing a set of coils they have already met several of our
quality benchmarks. One of the outstanding test is the coil must run for 5
minutes running at 1800 RPM without a coil wire attached, this test is
performed 3 times before arriving the packaging department. This is to test
the quality of the potting material, assuring that porosities or air bubbles
are not present. In most cases if either are present the coil will fail
prematurely. Eventually coil usage will degrade coil life or performance,
unfortunately translating this into a number of passes, races or years is
difficult to determine.
Helpful?
* What's the difference between a trigger from a magneto and a crank trigger?
The main difference is the stability of timing in most cases the generators
are driven by a drive system from the block in a single or dual
configuration. To provide clearance the drives are designed with an offset
driven by a belt arrangement or a set of gears. Belt stretch or backlash can
affect timing accuracies as well as the cam to crank drive suffering from the
same problem. This theory was unproven until RacePak developed their newest
software that can monitor timing during a run.
Here we have a run showing the difference in timing in the generators vs.
crank triggers. Notice how much the timing changes with the generator and how
much smoother the timing is on the crank triggers. With the timing moving
that much from base timing it explains the some of the catastrophic failures.
Helpful?
* What's the correct air gap on the crank trigger pick (Sensor)?
This is a common question that is affected by other outside sources like:
Crank Trigger Wheel Diameter:
(Smaller vs. larger, larger being better because of higher magnet velocity)
Starter Type:
Block mounted vs. External (Blower Mounted)
Battery voltage:
12 Volts -24 volts (block mounted) 36 - 48 Volts (External starters)
Induction:
Blown vs. Non-Blown (Blower more engine drag especially when re-stripped)
All of the above will play a role as to what the proper air gap will be for
that engine combination. Typical air gap should be between .040 to .080 the
low side is deemed by crank flex and high side is hard starting to no start.
If the engine fires up repeatedly, that can ensure the air gap is correct,
and crank flex has been accounted for.
Air gap should not have a performance effect of the magneto system, however
it has been noted that an excessive air gap can create a timing offset in the
Race Pac data recorder by as much as 2º depending on the air gap.
Another solution to the problem can be a "Change Over Switch" that will allow
starting with the generator and once started it can be switch to the crank
trigger pickups. This can be done using a 4 pole, Double-Throw switch for a
dual mag installation or a 2 Pole, Double-Throw switch for a single mag
installation (See wiring diagrams*). A word of caution here, extending
magnetic pickup leads can introduce EMI (Electro magnetic Interference) or RF
(Radio Interference) into the system, this can cause random misfire and
erratic timing, use at your desecration. Make sure to use a quality switch;
most switches will cost $50 to $80 dollars DO NOT USE A CHEAP SWITCH! Also
keep in mind that high vibration environments can cause switches to switch on
and off during a run possibly resulting in engine damage.
Helpful?
* What's the minimum voltage requirement for the Pro Mag Timing Control?
The minimum voltage will be 5.0 Volts to as high as 18.0 volts. Keep in mind
that other devices connected to the battery (other than the Pro Mag Timing
Retard and Six Shooter) like the air switches that can draw more current than
the Pro Mag Timing Retard and Six Shooter. One good test would be to monitor
the voltage with a meter and trigger the switches or timers via the WOT
switch and watch the voltage.
Helpful?
* Why does my tachometer jumps around on the rev-limiter?
It sounds like the tachometer is connected to the 8132 Tach converter that is
connected to the coil. When the Rev Limiter is active it randomly drops
cylinder by not lighting certain cylinders. The coil then does not spark on
those cylinders so the Tach converter does not generate a tach signal for the
tachometer causing it to jump around.
One way to eliminate the tachometer jumping is the use of our Pro Mag Timing
Retard that has a tach output. This unit will insure smooth tach trigger
during Rev limiting because it not connected or depending on a coil signal.
Helpful?
* When should I replace my cap and rotor?
Again these parts are a consumable item of the ignition system and the power
level that we're running at these parts will wear and at a higher rate than
accustom to than non MSD magneto products. Typical wear will have a burnt or
worn edge that's not as crisp or sharp but should not hurt performance. The
life of a cap and rotor on a 44-amp system will shorter vs a 12 or 20 amp
system.
Helpful?
* What's the correct air gap on the crank trigger pick (Sensor)?
This is a common question that is affected by other outside sources like:
Crank Trigger Wheel Diameter:
(Smaller vs. larger, larger being better because of higher magnet velocity)
Starter Type:
Block mounted vs. External (Blower Mounted)
Battery voltage:
12 Volts -24 volts (block mounted) 36 - 48 Volts (External starters)
Induction:
Blown vs. Non-Blown (Blower more engine drag especially when re-stripped)
All of the above will play a role as to what the proper air gap will be for
that engine combination. Typical air gap should be between .040 to .080 the
low side is deemed by crank flex and high side is hard starting to no start.
If the engine fires up repeatedly, that can ensure the air gap is correct,
and crank flex has been accounted for.
Air gap should not have a performance effect of the magneto system, however
it has been noted that an excessive air gap can create a timing offset in the
Race Pac data recorder by as much as 2º depending on the air gap.
Another solution to the problem can be a "Change Over Switch" that will allow
starting with the generator and once started it can be switch to the crank
trigger pickups. This can be done using a 4 pole, Double-Throw switch for a
dual mag installation or a 2 Pole, Double-Throw switch for a single mag
installation (See wiring diagrams*). A word of caution here, extending
magnetic pickup leads can introduce EMI (Electro magnetic Interference) or RF
(Radio Interference) into the system, this can cause random misfire and
erratic timing, use at your desecration. Make sure to use a quality switch;
most switches will cost $50 to $80 dollars DO NOT USE A CHEAP SWITCH! Also
keep in mind that high vibration environments can cause switches to switch on
and off during a run possibly resulting in engine damage.
Helpful?
* Why can't I start my engine?
In most cases it due to "Cranking RPM" or lack of RPM, the Pro Mags must see
a minimum of 200 to 250 RPM to start. There are several variables that can
contribute to a "NO Start" situation:
Starter type
Battery voltage
Newly re-striped blower*
Blower Overdrive
If Crank Triggered excessive Crank pickup air gap (See "What's the correct
air gap on the crank trigger pick (Sensor)?")
Insure that the starter is of a Hi-Torque type and that the batteries are
fully charged. Checking battery voltage while cranking will insure batteries
are fully charged. In some cases 16 to 18volts can aid to a faster cranking
speed. A word of caution: Not all starters can tolerate higher voltages and
most block-mounted starters should not exceed 18Volts.
*A newly re-striped blower can have enough friction to lower the cranking
speed, try spraying silicon spray to lubricate the rotors. If that doesn't do
it remove the blower belt (For testing purposes) and check for spark, this
should free the motor up enough that if you do get spark your cranking speed
is too low to start the engine with the blower. If you do not get spark
remove the spark plugs and crank the engine again (With the plugs removed the
engine will spin quickly) if still no spark check the following:
Inspect all connectors to insure the pins have not back out and insure that
the "grounds" are correct (see diagram) or call us. (915) 857-2785 in the Pro
Mag Tech department. We can then walk you through several other steps.
Helpful?
* How can I trouble shoot my mag at the racetrack?
There is several ways to trouble shoot the system in a "NO SPARK" situation:
* Is the rotor turning, something in the drive could have broken.
* Is the starter turning fast enough?
* Are the starter batteries fully charged?
* Has the blower been re-striped? Try silicone spray in the blower.
* Is the Kill switch stuck "closed"? Sometimes the contacts can arch or weld
themselves closed. (Disconnect for test)
* Check the 4 pin connectors and pins to see if any of the pins have backed
out of the connectors.
* If Crank triggered, check the crank pickup air gap it should be .030 to
.080. Bypass the crank trigger pickup by connecting the two pin connectors
on the side of the generator together and try restarting the engine, if it
starts check the connections and cable for breaks.
* Check the pickup resistance with an ohm meter it should read:
* 3/8 pickup = 115 Ohms
* 3/4 pickup = 68 Ohms
* Internal pickup in the generator = 600 Ohms
Helpful?
* Why can't I start my engine?
In most cases it due to "Cranking RPM" or lack of RPM, the Pro Mags must see
a minimum of 200 to 250 RPM to start. There are several variables that can
contribute to a "NO Start" situation:
Starter type
Battery voltage
Newly re-striped blower*
Blower Overdrive
If Crank Triggered excessive Crank pickup air gap (See "What's the correct
air gap on the crank trigger pick (Sensor)?")
Insure that the starter is of a Hi-Torque type and that the batteries are
fully charged. Checking battery voltage while cranking will insure batteries
are fully charged. In some cases 16 to 18volts can aid to a faster cranking
speed. A word of caution: Not all starters can tolerate higher voltages and
most block-mounted starters should not exceed 18Volts.
*A newly re-striped blower can have enough friction to lower the cranking
speed, try spraying silicon spray to lubricate the rotors. If that doesn't do
it remove the blower belt (For testing purposes) and check for spark, this
should free the motor up enough that if you do get spark your cranking speed
is too low to start the engine with the blower. If you do not get spark
remove the spark plugs and crank the engine again (With the plugs removed the
engine will spin quickly) if still no spark check the following:
Inspect all connectors to insure the pins have not back out and insure that
the "grounds" are correct (see diagram) or call us. (915) 857-2785 in the Pro
Mag Tech department. We can then walk you through several other steps.
Helpful?
* How can I trouble shoot my mag at the racetrack?
There is several ways to trouble shoot the system in a "NO SPARK" situation:
* Is the rotor turning, something in the drive could have broken.
* Is the starter turning fast enough?
* Are the starter batteries fully charged?
* Has the blower been re-striped? Try silicone spray in the blower.
* Is the Kill switch stuck "closed"? Sometimes the contacts can arch or weld
themselves closed. (Disconnect for test)
* Check the 4 pin connectors and pins to see if any of the pins have backed
out of the connectors.
* If Crank triggered, check the crank pickup air gap it should be .030 to
.080. Bypass the crank trigger pickup by connecting the two pin connectors
on the side of the generator together and try restarting the engine, if it
starts check the connections and cable for breaks.
* Check the pickup resistance with an ohm meter it should read:
* 3/8 pickup = 115 Ohms
* 3/4 pickup = 68 Ohms
* Internal pickup in the generator = 600 Ohms
Helpful?
* What's the maximum amount of timing I can retard a Pro Mag system with a
Timing Retard?
The Pro Mag Timing Retard is 30º this s because of rotor phasing, any more
than 30 degrees will result in a crossfire in the generator cap. Older Timing
retard system that use retard chips are the same 30 degrees maximum.
The Pro Mag Timing Control was initially designed with a maximum of 15º of
retard, but at the racers request we have pushed the unit to 30º of retard.
By doing this the calibrations have changed slightly from 15º to 30º here are
the values:
16º = 16º, 17º = 17º, 18º = 20º, 19º = 21º, 20º = 22º, 23º = 23º, 24º = 24º,
25º = 25º, 26º = 26º, 27º = 27º, 28º = 28º, 29º = 29º, 30º = 30º
These can be purchased at the MSD trailer only and are very limited supply.
They only cost $8 each
Helpful?
* How often should spark plug wires be replaced?
Spark plug wires are a consumable item like oil in the engine, they should be
changed on a frequent schedule that is determined by how often they run. A
routine schedule of cleaning, inspecting and checking the resistance of the
wires should be done as a routine maintenance program of the car. Some teams
even keep a logbook of the resistance of when the wires were built to compare
after running.
Some of the most common problems can come for the actual wire crimps that can
be resolved by re-crimping the terminals or replacing the terminal. The
terminals are designed as a conductor crimp so the conductor does not have to
be bent over which fracture or damage the conductor making it can read a
higher resistance than normal.
The resistance should be 40 to 50 ohms per foot once the measurement is noted
that value should not change. The only other facture that cannot be checked
is the outside jacket, other than cleaning and a visual inspection looking
for abrasion, cuts and pinholes, the jacket will deteriorate in time due to
the amount of energy being transferred through the wires.
The coil wire should be replaced often as it gets hit 8 times more than the
other wires. Big budget teams replace wire set about every third race while
most others would replace them every 6th to7th race. There really is no gauge
as to how often to replace wire set. Remember the wires are the actual
delivery system of the spark energy to the spark plug that will affect a
performance of the engine if not up to par.
Helpful?
* How often should coils be replaced?
This is a tough question to answer, there are only two reasons to replace
coils when one is "Open" or has a shorted winding. In either case most can be
found with a simple L.C.R. (Inductor, Capacitance and Resistance) meter.
Notice that there are several numbers inscribed on the back of all coils.
One set is the date code (which had been changed to an easier method to read)
and the second and third sets are the inductance values of the coils. In this
case the numerical value does not represent any form of performance like 709
vs. 899 these numbers are simply inductance values of the windings. These
numbers are used to monitor a change within the coil. Keep in mind that these
numbers are relative to the meters being used, several variables can account
for the values: coil temperature, lead length, and meter model and meter
frequency output. So if you purchase an LCR meter these numbers will differ
slightly from actual numbers on your coils. Once you acquire a meter it would
be wise to log these values and periodically check them to see if they have
changed. Theoretically, once a coil is built and has run successfully down
the track it should never fail unless due to exterior damages.
In the beginning (1994) our coils were capable of extremely high voltages.
The coils were capable of 55,000 volts to 60,000 volts as time passed we
found that these voltage capabilities were unnecessary and were resulting in
a high yield of coil failures prior to shipping. We redesigned the coils
limiting the output voltages to 45,000 volts, this resulted in cooler running
coils that were not capable of destroying themselves yielding higher
percentages of higher quality coils.
Prior to purchasing a set of coils they have already met several of our
quality benchmarks. One of the outstanding test is the coil must run for 5
minutes running at 1800 RPM without a coil wire attached, this test is
performed 3 times before arriving the packaging department. This is to test
the quality of the potting material, assuring that porosities or air bubbles
are not present. In most cases if either are present the coil will fail
prematurely. Eventually coil usage will degrade coil life or performance,
unfortunately translating this into a number of passes, races or years is
difficult to determine.
Helpful?
* Why should a capacitor PN 8830MSD be installed with a retard control?
The purpose for the capacitor is to buffer the action of the "ON / OFF"
switch to the battery in a monetary open condition due to severe tire shake
or vibration. With the capacitor in place the retard box would never see the
open condition, if it did, the entire ignition system would lose power (Shut
completely off) and re-ignite again, possibly resulting in engine damage.
Helpful?
* What's the difference between a trigger from a magneto and a crank trigger?
The main difference is the stability of timing in most cases the generators
are driven by a drive system from the block in a single or dual
configuration. To provide clearance the drives are designed with an offset
driven by a belt arrangement or a set of gears. Belt stretch or backlash can
affect timing accuracies as well as the cam to crank drive suffering from the
same problem. This theory was unproven until RacePak developed their newest
software that can monitor timing during a run.
Here we have a run showing the difference in timing in the generators vs.
crank triggers. Notice how much the timing changes with the generator and how
much smoother the timing is on the crank triggers. With the timing moving
that much from base timing it explains the some of the catastrophic failures.
Helpful?
* What's the minimum voltage requirement for the Pro Mag Timing Control?
The minimum voltage will be 5.0 Volts to as high as 18.0 volts. Keep in mind
that other devices connected to the battery (other than the Pro Mag Timing
Retard and Six Shooter) like the air switches that can draw more current than
the Pro Mag Timing Retard and Six Shooter. One good test would be to monitor
the voltage with a meter and trigger the switches or timers via the WOT
switch and watch the voltage.
Helpful?
* Why does my tachometer jumps around on the rev-limiter?
It sounds like the tachometer is connected to the 8132 Tach converter that is
connected to the coil. When the Rev Limiter is active it randomly drops
cylinder by not lighting certain cylinders. The coil then does not spark on
those cylinders so the Tach converter does not generate a tach signal for the
tachometer causing it to jump around.
One way to eliminate the tachometer jumping is the use of our Pro Mag Timing
Retard that has a tach output. This unit will insure smooth tach trigger
during Rev limiting because it not connected or depending on a coil signal.
Helpful?
Get help from other Gear Heads!
Product Registration
Extend your Warranty!
Warranties
Ask Our Experts!
1-866-464-6553
Email A Technician
Back To Top
JOIN THE HOLLEY FAMILY
Stay up to date with the latest releases, events, promotions and more.
Sign Up
COMPANY INFO
* About Us
* Investors
* Careers
* Patents
* Terms of Use
* Privacy Policy
* CCPA Privacy Policy
TECHNICAL SUPPORT
* Technical Resources
* Product Registration
* Warranty Information
HELP
* Track Your Order
* Report a Damaged Item
* Returns Policy
* See All Help Topics
ASK OUR EXPERTS
1-866-464-6553
Monday - Friday8AM - 5PM CST
(Hours may vary)
ASK OUR EXPERTS
1-866-464-6553
Monday - Friday8AM - 5PM CST
* Company Info
* About Us
* Investors
* Careers
* Patents
* Terms of Use
* Privacy Policy
* CCPA Privacy Policy
--------------------------------------------------------------------------------
* Technical Support
* Technical Resources
* Product Registration
* Warranty Information
--------------------------------------------------------------------------------
* Order Help
* Track Your Order
* Report a Damaged Item
* Returns Policy
* See All Help Topics
--------------------------------------------------------------------------------
*
*
*
*
*
*
© 2024 Holley Performance Products, Inc. All Rights Reserved.