800.345.4545
Unrivaled Customer Service
And Expert Tech Advice!  
FREE SHIPPING!
Same Day Shipping Before 11 PM ET
0
My Cart
0
$0.00
Shop By Vehicle
Shop By
Category
Close Menu
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories


Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates
Rebates
Help

MSD Ignition 8644

Flying Magnet Crank Trigger Kit Big Block Ford (except Cleveland)

MSD Ignition 8644
Representative Image
Product images may differ from actual product appearance.

121-8644

made in usa
jegs shipping
FREE Shipping
Ships
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
MSD Ignition 8644 Flying Magnet Crank Trigger Kit Big Block Ford (except Cleveland) $354.95
Flying Magnet Crank Trigger Kit
  • Big Block Ford (except Cleveland)
  • 7.25" Balancer

  • MSD Ignition 8644 Details

    Big Block Ford

    MSD's Flying Magnet Crank Trigger system stabilizes ignition timing.

    Features:
  • Absolutely the most accurate way to trigger the ignition
  • The non-magnetic pickup cannot be false triggered
  • Powerful magnets are embedded in a billet aluminum trigger wheel
  • Kit features special brackets and mounting hardware for engine

    Note: Not legal for sale or use on pollution-controlled vehicles.

  • Specifications:

    Material
    Aluminum
    Hardware Included
    Yes
    Adjustable Mounting Bracket Included
    Yes
    Bracket Finish
    Red anodized
    Crank Trigger Wheel Included
    Yes
    Crankshaft Wheel Finish
    Red anodized
    Pickup Included
    Yes
    Quantity
    Sold as a kit
    Bracket Material
    Billet aluminum
    Manufacturer's Part Number:
    8644

    Flying Magnet Crank Trigger

    Stable ignition timing is a necessity in performance engines. In most cases, a distributor will do just fine, but when you start making big-time horsepower with extreme cylinder pressures, the timing is critical to both the performance and the life of the engine. The ignition must be triggered at a precise time in relation to the position of the piston the compression stroke. Think of all the mechanical stretching and flexing that takes place through the timing chain, gears and cam before the distributor pickup triggers the ignition. The crankshaft on the other hand, knows exactly where each piston is, plus it is the most stable component of the engine in relation to piston position. That's why a crank trigger for timing is so important in high horsepower engine applications.

    Most crank triggers use steel studs that stick out of the wheel to trigger a magnetic pickup. However, the stationary magnet can be triggered by track debris, vibration or even bolts. MSD uses a non-magnetic pickup which gets triggered by powerful magnets that are embedded in the trigger wheel. This ''flying magnet'' design cannot be false triggered. The only way to trigger the ignition is when a magnet passes the pickup.

    This non-magnet pickup is securely held in position by CNC machined aluminum brackets. These brackets feature a long adjustment slot providing a large range of accurate timing adjustments. Plus, many of the brackets can be used on either side of the balancer for easy installation. Most kits are supplied with several spacers for different accessories and pulley systems.

    MSD PREVENTS FALSE TRIGGERING

    The crank trigger timing wheel is also machined out of 6061-T6 aluminum and anodized MSD Red. Each ''rare earth'' magnet is pressed and then riveted into the wheel to handle the fierce rpm and vibration that high horsepower engines put out. By installing the magnets in the trigger wheel, MSD has done away with the chance of false triggering. As the engine is rotating, the magnets pass the Non-Magnetic Pickup and create a signal that triggers the Ignition. The magnets are the only thing that can trigger the ignition making it the most reliable and accurate way to trigger your ignition.

    All MSD Flying Magnet Crank Trigger Kits must be used with an MSD Ignition Control. Kits include mounting brackets, trigger wheel, non-magnetic pickup, centering ring and mounting hardware.

    NOTE: A locked-out distributor must be used with a crank trigger system.

    JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

    Does MSD Ignition 8644 fit your vehicle?

    Narrow Results

    1975-1976 FORD F-250

    • Liter: 6.4
    • SubModel: RANGER XLT
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1994-1996 FORD F-250

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977 FORD F-250

    • Liter: 6.6
    • SubModel: XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1987-1992 FORD F-350

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1977 MERCURY COUGAR

    • Liter: 6.6
    • SubModel: BROUGHAM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977 FORD RANCHERO

    • Liter: 7.5
    • SubModel: 500
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1983-1984 FORD F-250

    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1978-1981 FORD F-350

    • Liter: 5.8
    • SubModel: RANGER LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995 FORD F-350

    • Liter: 5.8
    • SubModel: EDDIE BAUER
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1982-1983 FORD F-250

    • Liter: 5.8
    • SubModel: XLS
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1976 MERCURY MONTEGO

    • EngineType: ALL
    • SubModel: BASE

    1976-1979 FORD RANCHERO

    • Liter: 5.8
    • SubModel: GT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1972-1974 FORD RANCHERO

    • Liter: 6.6
    • SubModel: GT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976 FORD F-350

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1979 FORD F-100

    • Liter: 7.5
    • SubModel: RANGER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1978-1981 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1995 FORD MUSTANG

    • EngineType: ALL
    • SubModel: SVT COBRA R

    1975-1976 FORD F-350

    • Liter: 5.9
    • SubModel: RANGER
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1982 FORD F-250

    • Liter: 6.6
    • SubModel: XL
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 FORD THUNDERBIRD

    • EngineType: ALL
    • SubModel: ALL

    1977 FORD F-250

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1989-1997 FORD F53

    • EngineType: ALL
    • SubModel: ALL

    1975-1979 FORD F-350

    • Liter: 7.5
    • SubModel: RANGER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1985-1992 FORD F-250

    • Liter: 7.5
    • SubModel: XLT LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1976 FORD F-150

    • Liter: 6.4
    • SubModel: RANGER XLT
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1977 LINCOLN VERSAILLES

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1983 FORD E-100 ECONOLINE

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995 FORD F-350

    • Liter: 7.5
    • SubModel: EDDIE BAUER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1985-1996 FORD BRONCO

    • Liter: 5.8
    • SubModel: EDDIE BAUER
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1981 FORD F-150

    • Liter: 5.8
    • SubModel: RANGER LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1976 MERCURY MONTEGO

    • EngineType: ALL
    • SubModel: MX

    1975-1976 LINCOLN MARK IV

    • EngineType: ALL
    • SubModel: ALL

    1975-1979 LINCOLN CONTINENTAL

    • EngineType: ALL
    • SubModel: ALL

    1975-1982 FORD E-350 ECONOLINE

    • Liter: 7.5
    • SubModel: CHATEAU
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1993-1995 FORD F-150

    • EngineType: ALL
    • SubModel: LIGHTNING

    1977-1978 FORD F-350

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976 FORD F-150

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1977-1979 FORD F-100

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1983-1996 FORD E-250 ECONOLINE

    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1984-1986 FORD E-150 ECONOLINE

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1983 FORD F-350

    • Liter: 7.5
    • SubModel: XLS
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1977-1978 FORD RANCHERO

    • Liter: 6.6
    • SubModel: SQUIRE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 FORD F-100

    • Liter: 5.9
    • SubModel: RANGER XLT
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1977-1981 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978-1979 FORD F-350

    • Liter: 7.5
    • SubModel: RANGER LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1979 FORD F-250

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1997 FORD F-250 HD

    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD THUNDERBIRD

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1993-1996 FORD F-250

    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1978-1980 FORD LTD

    • CC: 5752
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1976 FORD F-250

    • Liter: 5.9
    • SubModel: RANGER
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1977-1981 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1984-1992 FORD BRONCO

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1997 FORD F-250 HD

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-250

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 FORD LTD

    • EngineType: ALL
    • SubModel: BROUGHAM

    1977-1978 FORD LTD II

    • Liter: 6.6
    • SubModel: S
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1978 FORD E-350 ECONOLINE

    • Liter: 7.5
    • SubModel: NORTHLAND
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1984-1989 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 MERCURY COUGAR

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1978 FORD E-150 ECONOLINE

    • Liter: 5.8
    • SubModel: NORTHLAND
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977 MERCURY COUGAR

    • Liter: 5.8
    • SubModel: BROUGHAM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1981 FORD F-150

    • Liter: 5.8
    • SubModel: RANGER
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1982 FORD E-100 ECONOLINE

    • Liter: 5.8
    • SubModel: CHATEAU
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1976 FORD F-350

    • Liter: 5.9
    • SubModel: NORTHLAND
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1994-1996 FORD BRONCO

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1981 FORD F-250

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1979 FORD F-150

    • Liter: 7.5
    • SubModel: RANGER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1980 FORD E-250 ECONOLINE

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1992-1996 FORD E-350 ECONOLINE

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1978-1979 FORD F-150

    • Liter: 7.5
    • SubModel: RANGER LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1982 FORD E-350 ECONOLINE

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1976 FORD F-350

    • Liter: 5.9
    • SubModel: CUSTOM
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1978-1979 FORD F-250

    • Liter: 7.5
    • SubModel: RANGER LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1982 FORD F-250

    • Liter: 5.8
    • SubModel: XLT LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 FORD LTD II

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978 FORD BRONCO

    • EngineType: ALL
    • SubModel: NORTHLAND

    1977-1979 LINCOLN MARK V

    • EngineType: ALL
    • SubModel: ALL

    1975-1976 FORD F-150

    • Liter: 5.9
    • SubModel: CUSTOM
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1980 FORD E-250 ECONOLINE

    • Liter: 6.6
    • SubModel: CHATEAU
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1992-1996 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 7.5
    • SubModel: CHATEAU
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1980 LINCOLN CONTINENTAL

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1987-1991 FORD E-350 ECONOLINE

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 FORD F-150

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980-1982 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1978 FORD LTD

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 FORD F-350

    • Liter: 6.4
    • SubModel: NORTHLAND
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1975-1976 FORD F-100

    • Liter: 5.9
    • SubModel: RANGER
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1984-1991 FORD E-250 ECONOLINE CLUB WAGON

    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1976-1978 FORD F-150

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1977-1979 FORD F-100

    • Liter: 6.6
    • SubModel: RANGER
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1995-1996 FORD F-250

    • Liter: 7.5
    • SubModel: EDDIE BAUER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1984-1986 FORD E-250 ECONOLINE CLUB WAGON

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1983 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1977 FORD CUSTOM 500

    • EngineType: ALL
    • SubModel: ALL

    1977 FORD F-350

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1982 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: CHATEAU
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1980 FORD E-250 ECONOLINE

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1978-1979 FORD THUNDERBIRD

    • Liter: 5.8
    • SubModel: TOWN LANDAU
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-150

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )
    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations