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- Newsgroups: alt.hotrod,wiz.hotrod
- Path: sparky!uunet!europa.asd.contel.com!emory!rsiatl!hotrod
- From: hotrod@dixie.com (The Hotrod List)
- Subject: Re: HEI distributor swap
- Message-ID: <k6hq=hc@dixie.com>
- Date: Mon, 16 Nov 92 04:04:41 GMT
- Organization: Dixie Communications Public Access. The Mouth of the South.
- To: hotrod@dixie.com
- Reply-To: hotrod@dixie.com
- Posted-Date: Sunday, Nov 15 23:04:35
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- Approved: jgd@dixie.com
- Lines: 38
-
- Looking for an HEI for a '72 Caprice is a walk in the park! One thing that
- Chevrolet was/is good about is interchangability of parts... as far as
- physically "fitting" any distributor that they have ever put into a V-8
- will work. [there's always an exception ;-) the Raised-Block truck engines
- will not work] Basically, all you need to do is go down to your local
- shit-yard and find a clean-looking HEI unit out of a chevy by-product. Check
- the mechanical workings and overall "feel" of the unit. [around here you
- will pay around $35 to $40 for one, complete with cap and rotor.] Toss the
- old cap and rotor and buy the Accel units for ~ $20. Get some new plug wires
- [the wires for HEI and points ignitions are terminated at the distributor
- differently- and the stock HEI coil cranks out around 40,000 volts as opposed
- to the typical 10-15,000 for standard points-ignition coil.] Really the
- only other thing you have to do besides sliding the unit in and getting the
- timing right is to take the battery lead (the + from the points coil and
- connectorize it for the HEI unit and plug it into the "BAT" terminal on the
- HEI.) and bypass the ballast resistor used with the points ignition.
- Ummm... I think that's about it... the format here is a little sloppy
- but that should cover it... Oh, yeah, you will probably want to regap your
- spark plugs to .040 or .045 or so. My experience has shown me that going
- with 1 heat range cooler spark plugs works well also. Just a little
- commentary about the HEI swap: one thing that the factory HEIs suffer
- from is serious lack of mechanical advance. In the mid-to-late seventies,
- low compression smog motors were commonplace, and a natural consequence of
- this is distributors with little mechanical advance and tons-o-vaccum
- advance! If you can, find a distributor from a "performance" car...
- but remember you will probably be running a _lot_ more initial advance than
- you ever did with points. (I run around 18-19 degrees btdc in my present
- beater...) Just something to note. Whatever you do, don't throw away the
- factory weights that come with the HEI; if you want to recurve it, just
- get an aftermarket re-spinging kit and re-use the factory weights. If
- you use the cheezy weights that come with the aftermarket kit, you will
- most likely loose even more mechanical advance!!! Anyway, I hope this helps
- and if anything isn't clear don't hesitate to ask!
- JC.
- jca@fibercom.com
-
- ----------
- Posted by: emory!fibercom.com!jca (James Akers)
-