spark plug gap????
Thread Starter
Staging Lane
Joined: Mar 2005
Posts: 83
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spark plug gap???? So I just bought a 03 Z06 with no mods and about 37 k miles, Im trying to some maintenance on it and I got started with the spark plugs, after several debates with my buddys and previous experiences I decided to go with the standard NGK TR5, auto parts store stated they should be gapped at .40, NGK website states the same, however after doing a search on this forum I found most members gap them at .55. I checked my new spark plugs and they are set at .40 .Can any one tell me the right gap PLEASE?
Thread Starter
Staging Lane
Joined: Mar 2005
Posts: 83
Likes: 0
Whats the difference between the NGK TR5(2238) and the TR55 (3951) they are both v power copper plugs right? cause i remember using the TR 55 on my LS1 SS but now i have the TR5 that I got from Kraegen/O reilly's is this the same plug with a different preset gap?
For the TR55/TR5 .55. There is no difference between the plugs one is just gaped smaller from factory. I have used both gaped them at .55 in my N/A application with no issues. Good luck.
