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Topic: HEI Module upgrade

in Forum: C3 Engines


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HEI Module upgrade

Posted: 5/15/05 7:10pm Message 1 of 8
NuclearBob
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BURBANK, WA - USA
Joined: 12/21/2004
Posts: 59
Vette(s): 1981 Frost Beige Coupe... all original.. My SECOND Love...

I'm upgrading my cap, rotor and coil to handle a higher voltage.  I have already done wires and plugs.  My question is this:

Do I have to change out the HEI module in the distributor with one that is rated for the higher voltage, or can I retain the stock unit.  This is a 1981 HEI with the 7 pin HEI module.

Thanks!

Carl




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HEI Module upgrade

Posted: 5/15/05 7:28pm Message 2 of 8
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
What does the coil mfg. recommend? I would think it would be a good idea, but I doubt that you 'have to'. Now would be the time, tho. The module controls the saturation time of the coil, so a newer mod. that is compatable with the coil will be better, I think. Can you check with the coil mfg. for info on what would be best?


Joel Adams
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HEI Module upgrade

Posted: 5/18/05 8:49pm Message 3 of 8
After Shark
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Portland, TN - USA
Joined: 4/29/2003
Posts: 805
Vette(s): 1972 Coupe Anything, but Stock and more mods to come! SSBC Force 10 Brakes, 3.73, TH350, 355 CID, Rack and Pinion, Vette Brakes suspension front and rear.
Yes to take advantage of a hotter coil, you need a longer dwell time for the coil to build energy and a module that can release that energy.


HEI Module upgrade

Posted: 5/18/05 9:15pm Message 4 of 8
NuclearBob
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BURBANK, WA - USA
Joined: 12/21/2004
Posts: 59
Vette(s): 1981 Frost Beige Coupe... all original.. My SECOND Love...

That's what I thought.  I ordered an Accel module from Summit.  Thanks for the advice!

Carl




HEI Module upgrade

Posted: 5/19/05 5:16am Message 5 of 8
Sixty Eight Shark
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Sarasota, FL - USA
Joined: 5/16/2005
Posts: 41
Vette(s): 1968 LeMans Blue convertible / 4 speed / with a 1969 350/350hp engine,factory sidepipes, I added a AM/FM AC Delco 8 trax for feel THE 68 IS SOLD AND NOW I HAVE A '97 C-5 / 6 speed HELL OF A VETTE !!!!
I just changed my org. dist. to a Mallory daul point and a Accel Super Coil with Accel 300+ Racing Wires, It really woke up the tired 350. next- Hooker Headers with factory sidepipes.


HEI Module upgrade

Posted: 5/19/05 9:12pm Message 6 of 8
anips
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
you should buy your module and coil as a set, like a pair of shoes, don't try to mix and match brands and manufacturers, some don't work well with others


HEI Module upgrade

Posted: 6/4/05 6:01pm Message 7 of 8
Sixty Eight Shark
Former Member
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Sarasota, FL - USA
Joined: 5/16/2005
Posts: 41
Vette(s): 1968 LeMans Blue convertible / 4 speed / with a 1969 350/350hp engine,factory sidepipes, I added a AM/FM AC Delco 8 trax for feel THE 68 IS SOLD AND NOW I HAVE A '97 C-5 / 6 speed HELL OF A VETTE !!!!

Sorry, late post on this subject but the Mallory dis. and Accel coil came as a set on E-bay for $36.00 !!!!! I couldn't pass it up. It works great, you never know




HEI Module upgrade

Posted: 6/4/05 7:59pm Message 8 of 8
anips
Former Member
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
Glad to hear its working out, but sometimes they don't, happy motoring


in Forum: C3 Engines


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