tamark

just got an 01 trans am pretty stock motor, headers, no cat, 3 inch exhaust noticed the plugs were ngk tr6 one step colder then stock gapped at .035 guy told me motor was tuned by owner before him,should i put in tr55 plugs n gap at.060?motor runs ok just seems like it should have more.

00ZNewb

iTrader: (2)

Tr6 gapped at .35 sounds like it might have been tuned for nitrous. which would explain it being sluggish without it.

sepsis

iTrader: (7)

I had NGK TR5's gapped at .043 in my car and after a while it began to misfire at high rpm's. I switched to the Autolite Copper plugs gapped to .040 and it runs awesome now.

tamark

ok i may try those plugs, i was thinkin maybe nos was used, u think a hotter plug would be good?

sepsis

iTrader: (7)

For a mostly stock motor, I would stick with a stock spec plug.

Mine has pretty much the same mods as yours. Headers, ORY and a Hooker Aerochamber, P&P TB, a tune and a lid. The stock type plugs seem to work very well.

TransAmWS.6

True, no need for a different heat range than stock on a stock car. Seems like anything between .050"-.060" should work good. The TR55's I have in my car are gapped at .060" and there was a huge difference that was felt between these and my clapped out stock plugs.

mjs1012

iTrader: (36)

tr55's are good for your car. just gap them around .55 and youll be good to go.

BriancWS6

iTrader: (18)

I'm not trying to come off as an ***, but do a search. I have explained this very topic multiple times myself, even very recently. You'll find some great info if you look for it.

Good luck.

Sales2@Texas-speed

iTrader: (5)

TR55's gapped .050-.055" will be great!