Because way too many people think that idiotic boost = more power. I have had this debate with a couple guys running REVO software and it always comes out like this:man. i dunno.. prime AFRs are like 11.9ish and u went to 15! thats asking for blowing up. seriously. i have a revo chip in my car. and have developed a loud clatter now. and im wondering wtf is going on now. why does a german ecu chipping company. chip the ecus to run fricken 16-18psi when the stock turbos are innefficient after 12. so... im not quite sure whats going on here lol.