i have JDM SIR II B16A engine with GSR P72 ECU. is it ok for engine? because i hear vtec working on after around 6000 rpm.(dont know exactly when...) however i got z4 ecu which is 99-00 civic si ecu. is it better for engine? if not, what would be better for my engine? one more question, people say p27 is good. is it true?