MSD 8683 Timing Control for 87-Up GM HEI

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Jan 4, 2003 | 06:00 AM

DownUnderIROC

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Joined: Jul 1999

Posts: 109

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From: Sydney, Australia.

MSD 8683 Timing Control for 87-Up GM HEI

Does anyone have any experience or information on the MSD 8683 Timing Control for 87-Up GM HEI?

Jan 5, 2003 | 08:47 AM

Willie

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From: Tucson, Arizona USA

Car: 1987 Z28 Convertible

Engine: 305 TPI

Transmission: 5-speed

Jim,

Someone you know has had the 8683 for years now. Me! Here's a recent thread on it:

https://www.thirdgen.org/techbb2/sho...hreadid=150919

Jan 25, 2003 | 08:45 PM

mypontiac

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Joined: Jul 2001

Posts: 765

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Car: 1991 Conv. TA

Engine: Forged 350 with D-1SC

I am having knock problems with my 1991 TA ProCharged as well.

I am experiencing knock at the slightest flash of boost. I am working with a prom programmer to help with the tuning, but he says that I need an external way to control knock.

I have the Jacob's Pro Street Ignition. Can I add this MSD 8683 timing controller to my set up?

I am also considering alky/water injection.

Won't this help with knock problems?

Thanks.