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Pontiac of the Month

Rayz571's 1977 Can Am

2020 June
of the Month

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Hey guys now that I have the dist issue's more or less solved just wondering with the hei what would be a decent plug gap?As of now I an running around .035 and wondering if it should be more with the hei.

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The standard gap for a Pontiac 400 with an HEI distributor is .045. Running .035 is fine for a points and condenser distributor but not an HEI.

Some guys that run Mallory distributors combined with a Mallory ignition boxes will run as high as .060.

I'd start with .045 and go from there.

Edited by Frosty

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ok thanks much Frosty

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Glad to be of service Tetru.

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