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Big RED

07-12-2014 12:45 PM

Tune-up

Help!
Alright guys I am trying to tune-up my 81 vette but the emissions control label is too faded for me to read the spark plug gap setting. Anyone know what this should be? I have ACDELCO rapid fire platinum plugs
Thanks Guys

73shark

07-13-2014 07:14 PM

Welcome to the forum.

0.035" for non-HEI

0.045" for HEI

Big RED

07-14-2014 07:44 PM

Thanks a bunch but how do I tell if I have a HEI or not?

73shark

07-14-2014 09:44 PM

The distributor is larger. Corvettes started using them in 1975.

Hwfa	02-12-2015 11:16 PM

Thanks for the comments

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