OE Plug Gap On Higher Compression?

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May 25, 2014 | 09:28 PM

#11

AUTOT3K

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Joined: Sep 2012

Posts: 1,327

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From: Calgary, Alberta, Canada

Quote:

Originally Posted by smokinjj420

stick with a 0.60 gap, thats what i originally had with ngk laser platinum, ran great like sleeperlqx said i also lost power above 4500rpm and also power loss on hwy cruise when i switched to the TR5IX (NGK 0.4gap iridium). I now threw in a cheap set of ngk vpower platinum, gapped them to 0.60 and never looked back. everything is now back to normal. even my idle sounds better.

almost makes me want to try a few different gaps on the dyno and maybe a couple sets of plugs! too bad thatd be so much $$$$!

May 29, 2014 | 07:40 AM

#12

catman3516

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Joined: Jan 2014

Posts: 36

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From: new orleans

Ok guys, I installed the gm 41-985 after my cam swap(that's the factory plug) and left them gapped at 40, Runs good, Then I Read This Article About Opening Them To 60. At gmfullsize.com they tell me to put the 41-110 ac plugs in , what should those be gapped too?