HEI Replacment parts (GM) - Team Camaro Tech
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post #1 of 5 (permalink) Old Jul 6th, 12, 09:05 AM Thread Starter
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Gene
 
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HEI Replacment parts (GM)

Can anyone tell me where I may purchase replacement parts for a GM HEI distributor? I need bushings, springs, weights vac. can. I have installed an aftermarket distributor but would like to rebuild the GM. I have checked the web and many locals with no luck. I do not like the kits from Accel etc.
Thanks,
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post #2 of 5 (permalink) Old Jul 6th, 12, 10:50 AM
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Unhappy Re: HEI Replacment parts (GM)

I've been having the same issue Gene

It seems all the suppliers now only carry cheap or "Speed" replacement parts for them.
I have had some success by going down and camping at the counter of the NAPA dealer and going through his books for Echlin stuff. I tend to buy just about anything I see that looks even close to OEM spec ...
I've also hit a local 'Old's-Cool' type auto supply store in a nearby town - the counter guys know me and 'humor' me if I go during slow times in looking up and pulling 'Standard' (brand) parts so I can look at them.

The biggest problem is Weights and Springs - the GM weight profile is very technical and has a definite response during operation I've not found in most of the "Speed" kits
I try to use GM weights and select springs to allow the curve I need ...

The closest I've come to a decent 'kit' is the ProForm #66945BKC.
At least it looks pretty stock once installed ...
Summit has them for under $100 - http://www.summitracing.com/parts/pro-66945bkc
I've install two of them so far and they have both worked fairly well. I'm still not sure the mech. advance stuff is the best ... but they seemed to respond well after tuning.

Here is a Parts Diagram of a common HEI Click image for larger version

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Here's a site with some good info and guidelines - http://rmcavoy.freeshell.org/HEI.html

Hope some of this helps

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post #3 of 5 (permalink) Old Jul 6th, 12, 02:31 PM
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Re: HEI Replacment parts (GM)

Nice site, John.

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post #4 of 5 (permalink) Old Jul 7th, 12, 05:35 AM Thread Starter
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Re: HEI Replacment parts (GM)

Thanks, I had stumbled on the sight you suggested and used the information in disassembling my GM. My vac. advance was frozen, after a good clean and lube it is moving like new. Moving parts seem to show hardly any wear at all other than bushings and some wear on the hole in the weights. I drive my car on the street and interstate and would be better off with the stock or near stock setup.
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post #5 of 5 (permalink) Old Jul 7th, 12, 10:42 AM
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Thumbs up Re: HEI Replacment parts (GM)

Quote:
Originally Posted by gene68ss View Post
... I drive my car on the street and interstate and would be better off with the stock or near stock setup.
gene68ss
I'd most people are better off with the 'stock' GM set-up and curves than the aftermarket HEI suppliers would make you think

The best HEI mod I've found for most vehicles is to bring the advance in sooner and faster than 'stock'.
The factory set-ups usually tend to lag the advance to reduce emissions ...

Using a Ported vacuum signal is also a big plus for most street vehicles.
Increases the mileage and helps with other cruise operation and performance.
Many of the factory set-ups used the weight system to provide operational advance with the vacuum system serving only specific functions, such as advancing the timing to 'cool' the engine if needed via a thermo-controlled vacuum switch system.
The proper installation of the vacuum system can really enhance the performance of these units.

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