What year did GM start using HEI ignition?

GM’s High energy ignition (HEI), designed and built by the Delco-Remy division of General Motors starting in 1974. These units were used on all engines in 1975 through the mid-1980s, with several different variations over the years.

When did the GM HEI ignition distributor come out?

Great Performance, Affordable Cost! GM’s high energy ignition (HEI) distributor has been used as an affordable, easy to install performance distributor since its introduction in the mid 70s. It should come as no surprise being one of the most popular options among modern rodders and race enthusiasts to this day.

What does Hei stand for in a Chevy?

Most small block chevys use a hei distributor which stands for high energy ignition on a small block chevy v8 engine the distributor cap firing order is in a clockwise rotation. Cant figure out how to wire up the hei distributor.

What should the HEI be on a Chevy small block?

At about 5,250 to 5,750 rpm, a stock HEI will drop sparks. Although a Band-Aid fix is to close the plug gaps, this isn’t what’s needed to make good power. As a first step, let’s look at ways and means of sourcing an HEI with which to work.

How does the ignition system work on a Chevy small block?

First just ask yourself where else you can find a distributor and ignition system packaged into one compact, easy-to-use assembly. Installation involves little more than just dropping the unit into the motor and plugging in one wire. It’s hard to imagine anything much simpler, and on that basis, the HEI deserves high marks.

What does Hei stand for in GM ignition?

The GM HEI, which stands for High Energy Ignition, is a breakerless, transistor- controlled, inductive discharge system. It operates in a similar fashion to the conventional points type ignition, but relies solely on a series of electronic signals to turn on and off the primary current rather than the mechanical opening and closing of points.

What is the distributor for a Chevrolet small block engine?

High-quality, durable and dependable Chevrolet Performance distributors optimize the performance of your GM engine. These distributors are interchangeable among standard GM Small-Block and Big-Block V-8s. For tall-deck engines, use adjustable slip collar distributor P/N 10093387.

Can a GM points distributor be swapped to Hei?

With the exception of firewall clearance problems in various vehicles, this should apply to swapping most any GM points type distributor to HEI. Some benefits from the HEI swap include reduced maintenance, easier starting, and often a small improvement in gas mileage. Finding an HEI Distributor There are a couple of choices here, new or used.

How do you remove a HEI distributor from a Chevy?

Soak with penetrating oil and work carefully to avoid damaging the bushings. With the shaft out, the pick-up coil and pole piece assembly can be removed by carefully removing the snap ring from the upper end of the bushing. Once the distributor is fully dis-assembled, thoroughly clean everything.