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05-30-2010
alright i have an 05 gtp. its got 3" downpipe, power log, ported rear manifold, K&N FIPK intake, ceramic coated crossover pipe. i will next be getting a tune and an 180* t stat. what plugs should i run on this setup? i was looking at ngk but the safely modding your grand prix said not to unless you have a smaller pulley which i dont have yet. any advise?
05-30-2010
no pulley drop? id just go back with copper autolite 606's or 605's after drop id go with autolite 104's if necessary.
Originally Posted by SuperSport
05-30-2010
ok i want to see what i can do with out the pulley for now. its my everyday driver and i dont need any problems.
05-30-2010
smaller pulley with good tune wont give u any probs.. but i hear what ur sayin
Originally Posted by SuperSport
05-30-2010
Well, I’d say your choice should be at least partially based on KR. If KR is low now, stick with the stock heat range plugs (AL 606). If not try some 605s if your showing some KR.
05-30-2010
im not sure what my KR is at right now. i have a friend tuning my car with an hp tuner he works for some performance shop out of chicago. i will probably drop a heat range when i drop to a 3.6 pulley
05-30-2010
u should have slim to no KR with stock pulley and the intake and exhaust opened up with the mods u have.
Originally Posted by SuperSport
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