It also means the hotter that thing gets...and the smaller the pulley gets the more prone you are to pre-detonation...which means that 4* on a 3.8" is MAGNIFIED on a 3.2" probably 3 or 4 times. I just can't believe someone with a boosted car won't run a high octane...I mean...are you really hurting to where you won't spend the extra $3 at a the pump every fill up?