Spark Plug Gap Recommendation Needed.

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Apr 14, 2005 | 09:58 AM

elkabong

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From: 84 383 XFire Chandler, AZ

Spark Plug Gap Recommendation Needed.

I am installing my 383 but I realized that I need to gap the plugs and I am not sure where to set them. I am running TFS 64cc chambers and the CR is around 10.3:1.

I am using Autolite 3924 per the TFS recommendation. What would be a good gap?

Thanks in advance.

Apr 14, 2005 | 10:50 AM

Nathan Plemons

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Kinda depends on your ignition system.

I gap my LT1 @ .060 with no problems at all.

Apr 14, 2005 | 11:21 AM

elkabong

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From: 84 383 XFire Chandler, AZ

My Vette is a 84 and I just have a Accel Coil and Module. Everything else is stock. Maybe I am wrong but I thought a higher compression motor required a slightly tighter plug gap. Stock is 0.044 - I think.

Apr 14, 2005 | 02:21 PM

CFI-EFI

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From: The Top of Utah

Stock is .045" (BFD) and I would stick with it.

RACE ON!!!

Apr 14, 2005 | 02:45 PM

88421VETTE

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From: W.V.C. Utah

Quote:

Originally Posted by CFI-EFI

Stock is .045" (BFD) and I would stick with it.

RACE ON!!!

I beleive I gapped the plugs in my 406 at .045" is that right

Apr 14, 2005 | 02:56 PM

CFI-EFI

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That should be fine.

RACE ON!!!

Apr 14, 2005 | 07:19 PM

elkabong

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From: 84 383 XFire Chandler, AZ

Cool thanks.

Apr 14, 2005 | 08:07 PM

Fuzzy Dice

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From: Melbourne Florida

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I run the Autolite 606's in mine...they are gapped at .030...makes it idle a tiny bit rough but at the track it's perfect for WOT...btw, I just changed mine and the old ones looked like brand new after 20 months and over 300 passes at the dragstrip...not bad for $1.57 each...

Last edited by Mr Mojo; Apr 14, 2005 at 10:21 PM. Reason: sig pic too large