HEI ignition, checking timing
Thread Starter
Racer
Joined: Apr 2004
Posts: 472
Likes: 0
From: Hartland WI
HEI ignition, checking timing
Advice needed for a novice. I recently purchased a 72 and want to check to see where the timing is set. Any tips/tricks to do this with HEI ignition? I read the Lars faq about this but it says his procedure will not work on HEI ignition systems. Any good faqs for one with?
Thanks for any info.
Thanks for any info.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Your 72 should not have HEI as a stock ignition. Someone must have changed the distributor at one point.
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Eddie 70
Your 72 should not have HEI as a stock ignition. Someone must have changed the distributor at one point.
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
thats a really good article, you know we all make this more complicated than it really is....once you have seen Lars do his magic to multiple cars you really start to realize this.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by Eddie 70
Your 72 should not have HEI as a stock ignition. Someone must have changed the distributor at one point.
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
Try this link to setup an HEI non computer controlled.
http://www.thirdgen.org/newdesign/tech/hei.shtml
Drifting
Joined: Dec 2004
Posts: 1,313
Likes: 5
From: Middle Tennessee
The 71 that I bought last month has a HEI with mechanical tach drive on it. I haven't been able to "dial in" the advance on it yet. This article may help. Thanks!
BTW, at what RPM should we be getting 36 degrees advance?
BTW, at what RPM should we be getting 36 degrees advance?
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by proracr
The 71 that I bought last month has a HEI with mechanical tach drive on it. I haven't been able to "dial in" the advance on it yet. This article may help. Thanks!
BTW, at what RPM should we be getting 36 degrees advance?
BTW, at what RPM should we be getting 36 degrees advance?
It all depends on the springs that have been installed inside the distributor. Shoot for 36 degrees all in by 2500-3000RPM.
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Race Director
Joined: Dec 2000
Posts: 10,896
Likes: 2
From: CO
I just rebuilt my dizzy (kidtalk for distributor), I put in stock mech adv springs. I wonder how much effect different springs would have.
It seemed to run much better just getting the mechanical advance free again. it was rusted up.
It seemed to run much better just getting the mechanical advance free again. it was rusted up.
