most ZX owners swap the ECU so that they can run higher boost levels>. Jim Wolf reprograms fuel map,timing,rev limit raised (200rpm ?),top speed govenor removed.This allows the car to safely run 14psi NO detonation with boost jets installed. As long as you get a reprogramed ECU like Jim Wolf's and not just a chip that removes top speed limiter you baby will be safe, but hold on tight.