OE Plug Gap On Higher Compression?
May 25, 2014 | 09:28 PM
#11
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Joined: Sep 2012
Posts: 1,327
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From: Calgary, Alberta, Canada
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.
May 29, 2014 | 07:40 AM
#12
Teching In
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?
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