i've personally seen no major differences with advancing the timing like that with a b18b, especially a obd2 equipped one. if its a 94-95 b18b then sure it might help a bit, but the obd2 ones tend to somehow negate the effects of advancing the timing. also, remember that the b18b's dont have knock sensors, so if you're knocking, nothing (except your trained ears) is going to stop you from keeping your engine from pinging and knocking if you happen to advance it too much or not use the correct octane