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tuning timing boost

  1. Tuning for Timing

    PCM's & Tuning
    I have a 3.3pulley car w/supporting mods KR nonexistant, and Im runnin 21 degrees of timing at the shift points. I've heard from many people it's time to pulley down? Why? The best things in life are free and Timing is FREE horsepower. Now pulleyin down to my 3.25 or even 3.2 would then increase...