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Product Summary

392, HEI / Male Cap Type, HEI / Male Cap Terminal Style

    Key Specs

    D-40-39
    MFG. Part #8389
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical and Vacuum
    CARB EO#

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    MSD 8389 Details

    The Ready-to-Run dis­tributor earns its name with simple wiring. One wire to 12 volts, one to coil negative and another to ground. That’s it! A match­ing harness with a 3-pin Weathertight connector is supplied.

    Does not require an MSD Ignition Control.

    Features:

    • Simple and clean installation with only three wires to connect
    • Powerful built-in module produces a 7.5 amp single spark through high rpm
    • Easy-to-adjust mechanical advance with supplied springs and stop bushings
    • Vacuum advance canister for improved economy (can be locked out)
    • CNC machined billet aluminum housing and billet aluminum base
    • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
    • Polished steel shaft is QPQ coated and guided by sealed ball bearings
    • Advance plate and weights are fine blanked from Chromoly steel and QPQ coated for friction reduction
    • Mechanical advance assembly can be locked out for crank trigger systems
    • Advance weight pins are staked and tig welded to the plate
    • Nylon pads ensure smooth operation of the advance weights
    • Supplied with a HEI style distributor cap and rotor (accepts Cap-A-Dapts)
    • CARB E.O. Approved

    Features:

    • Simple and clean installation with only three wires to connect
    • Powerful built-in module produces a 7.5 amp single spark through high rpm
    • Easy-to-adjust mechanical advance with supplied springs and stop bushings
    • Vacuum advance canister for improved economy (can be locked out)
    • CNC machined billet aluminum housing and billet aluminum base
    • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
    • Polished steel shaft is QPQ coated and guided by sealed ball bearings
    • Advance plate and weights are fine blanked from Chromoly steel and QPQ coated for friction reduction
    • Mechanical advance assembly can be locked out for crank trigger systems
    • Advance weight pins are staked and tig welded to the plate
    • Nylon pads ensure smooth operation of the advance weights
    • Supplied with a HEI style distributor cap and rotor (accepts Cap-A-Dapts)
    • CARB E.O. Approved

    Charts

    Warranties

    For warranty information, please visit http://www.msdhelp.com/

    MSD 8389 Specifications

    D-40-39
    KEY SPECS
    MFG. Part #8389
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical and Vacuum
    CARB EO#
    GENERAL
    Speedway Motors Catalog Part #547-8389
    External Ignition Box RequiredNo
    Cap Terminal StyleHEI / Male
    Trigger StyleMagnetic
    Hall EffectNo
    Sync SignalNo
    Trigger SensorsSingle
    Gear RotationStandard
    Ignition Box RequiredNo
    Mechanical Tach DriveNo
    Slip CollarNo
    Housing MaterialBillet Aluminum
    Housing FinishNatural
    Rotor RotationClockwise
    EmissionsCalifornia EO Approved
    Marine UseNo
    Sold in QuantityEach
    GTIN Code085132083893