If I disconnect the IAB (vacuum line) and kept them open all the time, is it necessary to run a chipped p28 ecu? Or will a stock p28 ecu work? I've got a 93 hatchback with a b18c and I'm running the stock p72 right now. I definitely feel a loss of power at the low and mid range but I do notice a gain up top with the p72. I'm only asking because I've got a stock p28 sitting in my garage and I wanted to know if it may be better than the p72. Just want to know the pros and cons of running the different ecu's with the IAB's open all the time. I appreciate any info....


By the way, I don't really want to run with the IAB's open all the time but the solenoid broke (top hat broke off) and it's $170 from Honda.