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2004 gtp 3.8 bottom swap- Needing a tune!!

J

jsgibbs1203

New member
I had my motor go in my 2004 GTP and I swapped in a a Nonsupercharged lower end and put all my heads and intake and supercharger on it. What do I need for a tune? Will just a mail order tune get me done? Looking for a good tuner
 


I had a comp g that I did the same thing to. You are going to need more than a tune though to keep it from knocking. You will probably need headers and a bigger pulley, or a cam, or an intercooler. Or switch to e85.
 
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