NGK TR-55
Thread Starter
Safety Car
Joined: Dec 2002
Posts: 4,010
Likes: 1
From: SE Idaho
St. Jude Contributor
NGK TR-55
Ok, what do you guys/gals gap your TR-55s at? Factory spec (per GM manual) at least for factory plugs is 0.060. However, the NGK site implies the TR-55s should be gapped at 0.050. Not sure if 0.010 of an inch really means that much anyway. That, or since plug gaps tend to expand over time with certain plugs, could it be that NGK feels the gap on the AC plugs will increase to 0.060 over time?
[Modified by WhiteC5Vette, 7:10 AM 8/14/2003]
[Modified by WhiteC5Vette, 7:10 AM 8/14/2003]
Team Owner
Joined: Sep 1999
Posts: 20,054
Likes: 44
From: Swansea IL
Re: NGK TR-55 (WhiteC5Vette)
I bought my TR55IX plugs from Shawn @ LAPD, he recommends leaving them as they are. I did check prior to the install and they were all gapped @ .55
They really smoothed out the idle.
Tom
They really smoothed out the idle.
Tom
