HEI / electronic distributors? - Team Camaro Tech
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post #1 of 19 (permalink) Old Apr 5th, 12, 07:00 AM Thread Starter
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Marc
 
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HEI / electronic distributors?

Hi

What is the difference in spark energy and other benefits between a HEI with internal coil and module VERSUS a Electronic distrubutor with external coil and module?
For exemple :
PerTronix D1000 - PerTronix Flame-Thrower Street/Strip HEI Distributors
PerTronix D7100700 - PerTronix Flame-Thrower Plug and Play Billet Distributors with Ignitor III® Module

The first one is a HEI - I have to check for clearance -
The second is electronic with apparently the same Flame Thrower rmodule and a Multi Spark ignition module.

Price is similar, HEI has no multi spark, does HEI gives even higher spark energy?

I think I have clearance for HEI, I have 1.25 " clearance between my firewall and my actual electronic distrubutor (broken mallory unilite same size as point dizzy)

What would you recommend?

Best regards,


Marc

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post #2 of 19 (permalink) Old Apr 5th, 12, 08:53 AM
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Re: HEI / electronic distributors?

HEI is all-in-one distributor.
Has one wire hook-up, two if you include TACH output.
HEI will fire those spark plugs dunked in oil.
HEI will make a spark jumping a 0.045" gap, as any other design coil will do, but not as long in duration of spark.
Multi-spark is usually not doing multiple sparks after about 2500 rpms.
Multiple spark coils run cooler because of the surface area of the can to the ambient air.
HEI is enclosed in a cap and has more current flowing through the coil making it run hotter in temperature.
Pertronix can be installed in an original distributor retaining the OE look and smaller space due to the external coil.
HEI plug wires are expensive at the initial buy, but will last forever, almost.
These are just a few notes I can think of at the moment.
I'm sure other members will pick up the pace and respond as well.

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post #3 of 19 (permalink) Old Apr 5th, 12, 10:31 AM
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Re: HEI / electronic distributors?

Everett - what do you think of the conversion units out there replacing the points of a standard dizzy? Any of those units better the others. I saw someplace a review on one that was just single wire which looked easy to do - maybe on Musclecar.

Nice new avatar BTW.


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post #4 of 19 (permalink) Old Apr 5th, 12, 11:22 AM
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Re: HEI / electronic distributors?

IMO if you go multi spark then you should go with MSD, they really are the best at it.

HEI is self contained, and the single wire hookup is very attractive, however the MSD (multispark) fires the plug multiple times over the firing timeframe vs 1 spark, the idea is to make a more complete combustion event giving more power and economy.

HEI is simple to install and you can get parts for it anywhere, however there are so many autozones etc that sell MSD now I'd have to say it's about as easy to get parts for.
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post #5 of 19 (permalink) Old Apr 5th, 12, 11:46 AM
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Re: HEI / electronic distributors?

Use caution when running the HEI and MSD combined with a wide spark gap. It's been my experiance that the coil to rotor contact carbon will burn/melt the cap. With an HEI cap costing 3 times more than regualr cap that can get exensive. The most gap I could run on my HEI and MSD on a 10:1 454 .035 and not burn up the cap.

I do have an HEI in my 67, it fits with out issue and no firewall issues. I like the two wire hook up and internal coil it cleans up the install. This is on a 327 and I will just run normal plug gaps.

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post #6 of 19 (permalink) Old Apr 5th, 12, 12:10 PM
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Re: HEI / electronic distributors?

Marc,
Additional info here.
https://www.camaros.net/forums/showthread.php?t=206243

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post #7 of 19 (permalink) Old Apr 5th, 12, 06:12 PM
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Re: HEI / electronic distributors?

Brian, no personal experience but from other members comments, they seem to run good.
Look at a multi-spark set-up on an ignition oscilliscope.
You will see a couple sparks at idle and low rpm. Increase rpm and back to single spark.
The internal oscillator is not fast enough and can't be because coil saturation for the next spark takes time.
JMT's as I have looked at multi-spark with my ign o'scope.

Thanks for noticing the new avatar, Jake is the boy's name.

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post #8 of 19 (permalink) Old Apr 5th, 12, 06:19 PM
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Re: HEI / electronic distributors?

Thanks I'll do some research then and let you know.


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post #9 of 19 (permalink) Old Apr 5th, 12, 06:44 PM
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Re: HEI / electronic distributors?

You're welcome, let me know what your research finds.

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post #10 of 19 (permalink) Old Apr 5th, 12, 07:46 PM
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Re: HEI / electronic distributors?

will do


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post #11 of 19 (permalink) Old Apr 6th, 12, 02:27 AM Thread Starter
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Re: HEI / electronic distributors?

Thank you for your answer.
By the same time I also found out CDI is a real benefit for engines running on propane, for cold start and general performance.
I also found a discount on ebay for a CDI Accel 300+ with programmable unit Accel 375 for programming of advance curve.

Tell me please what type of distributor should work best with a CDI control box, and what I could go for.
I have currently good spark plug wires, that fit on a female cap connection type.


Regards,


Marc

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post #12 of 19 (permalink) Old Apr 6th, 12, 05:21 AM Thread Starter
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Re: HEI / electronic distributors?

I also checked clearance for HEI, I can go to a 5.5" diameter distributor.
Regards

Marc

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post #13 of 19 (permalink) Old Apr 6th, 12, 06:39 AM
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Re: HEI / electronic distributors?

If you're planning on having a ign box, the HEI distributor would only be for triggering the box. The HEI module has been removed.

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post #14 of 19 (permalink) Old Apr 6th, 12, 06:43 AM Thread Starter
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Re: HEI / electronic distributors?

I found one of these to be interesting to use with a CDI box :

PerTronix Flame-Thrower Remanufactured Billet Distributors
http://www.summitracing.com/parts/PNX-D100700R/

Summit Racing Street & Strip® Billet Distributors
http://www.summitracing.com/parts/SUM-850055/

What do you think? Any advice?
I understand the module has no function with the box, so these distributors seems good for the price and function.

I would run an external coil, I have a MSD blaster 2 coil.

Thanks.

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post #15 of 19 (permalink) Old Apr 6th, 12, 10:42 AM
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Re: HEI / electronic distributors?

In my experience mix and matching is a pain in the rear, buy something complete as a system, then you know it's engineered to work together. Putting in a different manuf coil, dist and trigger unit usually means headaches.
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