sparkplug gap question
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Joined: Oct 2000
Posts: 96
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From: Louisiana
sparkplug gap question
what gap should I use on a 69 smallblock with stock distributor and Petronix module? Does a wider gap mean more spark? Think I have it at 035 now and plugs seem a little gas fouled. Thanks Telk
Safety Car
Joined: Jan 2001
Posts: 4,660
Likes: 3
From: South Central Louisiana
St. Jude Contributor
Re: sparkplug gap question (telk)
My guess, .40 or .45 probably wouldn't hurt.
.45 is pretty common on the Big blocks.
What part of the Bayou State are you from, just outside of Lafayette here.
.45 is pretty common on the Big blocks.
What part of the Bayou State are you from, just outside of Lafayette here.
Team Owner
Joined: Feb 1999
Posts: 34,454
Likes: 665
From: Republic of Texas
Re: sparkplug gap question (71,454,4spd)
If you want a little more fire you can open them up to .50. The wider the gap the more spark, but less spark plug life. The narrow gap is the opposite. This is all within reason of course.
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Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Re: sparkplug gap question (telk)
.35 is correct. If you are fouling, I would say it's most likely a carb issue (too rich). Wider gaps are used with HEI, but are more likely to be problematic without HEI.
