ksk1980

iTrader: (33)

6.0 bored 40 over running 243's milled 10 thousandths. Running 61 cometic gaskets. Ls6 intake 36lb injectors . Long tubes, 3" ORY & cat back . Running ngk tr55's now gapped at 60 . Im thinking thats way to much gap for my setup and maybe even the wrong plug . Heard others mention their cars didnt like the tr55's either . Any suggestions?

ksk1980

iTrader: (33)

Forgot to mention. Flat top pistons without reliefs

64post

iTrader: (5)

Get TR6's, gap them .040 for a strong spark, it's been working well without issue. The 6's are slightly cooler.

01ssreda4

iTrader: (96)

If you're going to gap down to 35/40, you buy TR5s, not tr55s. They are the same plug other then where the gap should be. I run 5s at 40.