Scooter mate, the extra 1psi won't really make that much off a differance in speed but u will fuck your engine, if u want it to go fast by all means, go an ecu and u can run massive boost and atlest not have huge detonation which will atlest give your motor a little more life. btw, if u want to go faster, loose the huge mofo rims, u'll notice a huuuge difference.