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MSD Ignition 8379 MSD Pro-Billet Crank Trigger Distributors

MSD Ignition 8379 MSD Pro-Billet Crank Trigger Distributors

$430.00
$430.00
Sale Sold out

The MSD Ignition 8379 Pro-Billet Crank Trigger Distributor combines the timing accuracy of a crank trigger system with the convenience of a distributor-mounted pickup — the best of both worlds for small-block Chevrolet race engines. It eliminates spark scatter from timing chain slack by referencing the crankshaft directly through the distributor drive.

This distributor features a billet steel housing with a precision-ground shaft supported by dual ball bearings. The integrated crank trigger wheel is factory-phased to the magnetic pickup for a precise 60-degree trigger signal. The unit spins on sealed ball bearings rated for continuous 10,000 RPM operation. It includes fully adjustable mechanical and vacuum advance systems with MSD's quick-change spring and bushing kit. The cap is MSD's Pro-Cap with brass terminals rated for up to 300-amp ignition output.

The crank trigger design eliminates the 2-3 degrees of timing scatter common with camshaft-gear-driven distributors at high RPM, resulting in more consistent power output on the dyno. Installation drops into the same distributor hole as a standard distributor — no crankshaft trigger wheel or sensor bracket required. Connect the two-wire harness to your MSD box and dial in the timing.

Get crank trigger accuracy in a distributor package. Order the MSD 8379 Pro-Billet Crank Trigger and stabilize your timing curve for good.
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Frequently Asked Questions

How do I install this electrical distributor without damaging the electrical system?

Disconnect the battery negative terminal first when installing this distributor to prevent shorts. Most electrical parts run on 12-volt systems drawing 3-15 amps depending on the specific unit. Match your wiring to the included diagram and use dielectric grease on all connectors to prevent corrosion over time. Torque mounting hardware to 8-12 ft-lbs and test operation before reinstalling trim panels near this distributor. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.

What symptoms tell me this electrical distributor is failing and needs replacement?

A failing distributor causes misfires above 3,500 RPM, hard hot starts, or 200-400 RPM idle fluctuations in most vehicles. Check primary resistance with a multimeter readings outside 0.5-to-3.0 ohms indicate a bad component. Voltage below 12.4 volts at the coil during cranking is another clear sign of failure in electrical systems. Replacing this distributor restores 25,000 to 45,000 volts of spark energy across all engine cylinders. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.

Does this electrical distributor work with both factory ECUs and aftermarket standalone computers?

This distributor works with stock ECUs and aftermarket systems like Holley and MegaSquirt using 12-volt trigger signals. Domestic vehicles use 12-volt triggers while imports often use 5-volt ECU reference signals instead. This distributor runs on 4-, 6-, and 8-cylinder engines within a 9-16 volt operating range. Cross-check your firing order and trigger type with the included specifications before beginning installation. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.

Can I use this electrical distributor with a high-output CDI box for track or racing use?

Yes, this distributor works with CDI boxes producing up to 50,000 volts and 10-12 amps of spark current output. Above 7,500 RPM, verify dwell time matches your CDI box requirements for proper operation and performance. Pairing this distributor with a CDI system adds 5-15 percent more spark energy at the plug gap. Keep primary resistance above 0.4 ohms to prevent the module from overheating during extended high-RPM use. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.

What voltage and amperage does this electrical distributor require for everyday driving?

This distributor runs on 12-volt DC negative-ground systems drawing 3-8 amps under normal operating load conditions. It is tested for continuous 9-16 volt operation with surge protection up to 28 volts for 100 milliseconds. Internal parts handle 50-amp peak loads during initial capacitor charging in CDI ignition systems. Confirm your alternator outputs at least 13.5 volts at idle for consistent electrical component performance. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.

Will replacing this electrical distributor fix stalling and rough idle problems?

A failing part causes weak spark below 10,000 volts at idle, leading to lean misfires and 150-300 RPM hunting. Replacing this distributor restores full spark energy above 25,000 volts from idle to redline in your engine. Also check spark plug gaps at 0.035-0.045 inch and fuel pressure at 48-62 PSI for a thorough fix. This distributor directly addresses the root cause of stalling and rough idle issues you are experiencing. This ignitions & electrical routes ignition spark to each cylinder in order. These ignitions & electrical provide precise spark timing for your engine.