What are the wires on a HEI distributor?
There are two wires in the plug: the hot wire and the tachometer wire. If you are updating from an old distributor, splice the old distributor hot wire to the hot wire of the HEI primary plug.
Does an HEI distributor need to be grounded?
Engine man The modules and pickup coils shouldn’t be grounded to the distributor either. The newer HEIs have the coil mounted to the engine block so it gets it’s ground through the mount. Points need a ground in the distributor, but the electronic systems shouldn’t.
Do HEI distributors need a coil?
Most—but not all—HEI systems have the ignition coil mounted in the distributor cap. A control module and magnetic pickup are mounted in the distributor, in place of a conventional ignition system’s breaker points and condenser.
Where is #1 on a Chevy distributor cap?
How are Chevy cylinders numbered? The cylinders are ordered from the front of the engine to the rear, starting on the drivers side. That means the front left cylinder (when facing forward) is the number one position.
What causes weak spark on HEI distributor?
An HEI distributor that has a worn pick-up coil or corroded magnetic poles will produce a weak spark, with insufficient voltage to ignite the combustion gases. A yellow or intermittent spark indicates weak HEI coil output.
Is there a ground wire in distributor?
How do you ground a HEI distributor? There is a ground strap that bolts to the outside of the coil and comes out between the battery terminal and the tach terminal. From the factory the module harness atatches to this and the distributor in grounded to the intake.
Do I need a ballast resistor with HEI?
Whats the application? Generally speaking (and every one i have ever delt with), an HEI does not need a ballast, they use 12 volt switched ign for power. So, the easy way to bypass the ballast system would be to run another wire from the ignition switch that powers when you turn the key on to your HEI unit.
Is HEI or coil better?
Actually, an HEI draws only 2- to 3-amps, compared to the approximate 6-amps an external oil-filled coil draws. The lower amperage draw results in a much cooler running HEI coil. HEI Coils also run cooler because they are encapsulated in thermal epoxy, which dissipates heat more efficiently than oil-filled coils.
How do you tell the 1 on a distributor cap?
The cylinders are ordered from the front of the engine to the rear, starting on the drivers side. That means the front left cylinder (when facing forward) is the number one position. Then the numbers alternate from left to right. If you guessed the front right cylinder will be the number two position, you’d be correct.
How many volts on a HEI distributor?
The HEI just uses 12 volts. If it’s wired like points it will work on 9 volts but has problems being consistent especially at higher RPMs. If this has the GM HEI module, a high speed miss is not uncommon, it’s just on it’s upper limit.
What is wire size from ignition to Hei?
When using HEI, the distributor requires a 12 volt feed. In order to achieve this the ballast resistor or the resistance wire must be removed from the circuit and replaced with a pure 12 gauge feed wire. This feed wire must be 12 gauge from the ignition switch to the bulkhead and then from the bulkhead to the HEI power terminal.
What is distributor wire?
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