Hi there! I bought an Overkill pcm last summer and was wondering what would be my best option for my future modifications (SSAC Headers and 3.6" MPS pulley)...I have a 04 CompG GTP with the following support mods
NGK Iridium IX Spark Plugs/Wires, CAI, 180 T-Stat, Overkill PCM
After looking at some threads on the forums, many claimed that increasing the timing of the pcm to 20* degrees and keeping the stock 3.8" pulley would be a better option than swapping to a 3.6" pulley and would actually make the car faster...
1) Would it be a better choice?
2) How would it affect KR? Gas mileage?
3) If I decide to do it, should I ask for a re-flash at the original seller (Overkill) or go get a custom tune?
Thanks for your precious time and advice.
Just want to make sure before I blow something up
