24:1!! Way too lean. Dude you are destroying your car. The number is the air fuel ratio. 14:1 is around stochiometric, meaning the "perfect burn" ratio. 24:1 is burning up your motor. From what I understand (I am still a newb to suby's) You can't just tweak your boost pressure, you need to change the map when you change the boost psi. You are essentially adding extra air, but not so much the extra fuel.