D.U.I. Ignition Upgrade

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Apr 7, 2007 | 02:52 PM

jfarcas

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D.U.I. Ignition Upgrade

Hey guys,

I've been checkin out an upgrade for my '76 I6 ignition, and came across the DUI complete dist/coil/module setup. Have any of you had luck with these? Are they reliable, or worth the money?

Thanks!

Justin

Apr 7, 2007 | 03:28 PM

NavyMIDN08

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I'm planning on putting in a DUI in the spring (waiting for the tax refund check) and from everything i have garnered about the company, they're really getting good results. several of their units have been featured on some of the big power builds in some of the hotrod mags, and my interaction with the company has been very positive. i've emailed back and forth a few times, and they seem very willing to answer questions and work with me throughout the process. i've already made up my mind, so while i can't personally attest to their quality in MY truck, i have seen the performance numbers they have posted on several test engines from independent sources. if you check the august '06 issue of Hot Rod magazine, they do a buildup using the unit.

Apr 8, 2007 | 11:03 AM

Kalashtar

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Its a HEI unit. Its not bad but not really an upgrade, mostly expencive. It will run a hotter coil but not hotter than a later ford TFI coil. Also an HEI doesn't have the cranking timing retard of a duraspark II.
If your 76 has a green/black ignition box and small cap distributor your best upgrade for the money is a blue box, big cap/rotor/adaptor and a TFI coil.

If you absolutely want to run an HEI module its a 4 wire hookup to trigger your ford (or any mag pickup) distributor.

Last edited by Kalashtar; Apr 8, 2007 at 11:07 AM.

Apr 9, 2007 | 08:05 AM

Motorhead351

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duraspark II distributor + GM module + TFI coil = cheaper and it works well.

Might wanna try a search if that interests you.

Apr 9, 2007 | 04:45 PM

jfarcas

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Cool...

So what IS the difference between my current ignition system and the components you're listing as being suitable upgrades (TFI coil, blue box, durasparkII distributor)?

Apr 10, 2007 | 03:11 PM

Kalashtar

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lots of duraspark info here:
http://www.geocities.com/cantwait_fo...cj_ignmod.html
The oscilloscope threads show the side by side operation of an HEI and duraspark modules.

This is a GM hei module "stealthed" into a hollowed out duraspark box. The cast pot metal box acts as an excellent heatsink.

Last edited by Kalashtar; Apr 10, 2007 at 03:24 PM.

Apr 11, 2007 | 08:38 AM

kotzy

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The HEI may create a few more KV unloaded but what is the need. With the coils connected to plugs in the same or any engine somewhere around 9 to 13 KV fires them the rest is not needed or produced. Yes raising CR and other factors (rich/lean) effect the need, but I would venture to say that even the old basic point setup with 7mm wires will cover the requirements of normal street engines. By the way I used to test the old systems on the first model scope made available to the repair industry a Heyer, and the ignition systems in good shape at that time (1957) made 25/28 KV unloaded. Ignition coils are the laziest things on a car they only put out what they need to. Perhaps this will save somebody a bit of money, time or let them sleep a bit easier. If it ain't broke don't fix it.
Kotzy