thansk to all who answered my question, but i have one more. I bought a p72 ecu that was reprogrammed and he aske dme what i want my vtec engagement to be set at. Right now he has it set at 5,500rpm. Would i be better off to have it set back to 4,400rpm or what should i tell him. Just curious to at what rpm ratign i will get the most performance out of the vtec