Re: Whipple oil?
the whipple should have 5w-50 synthetic in it, if it doesn't you need to change it right away. that is the recomended oil. the whipple doesn't have an oil pump in it, the gears are just partialy submerged in oil and throw it around so adding a cooler would be dificult. also not sure how much it would help, you might be able to drop the housing 20deg or so but i wouldn't think that would effect the air temp by more than a deg or 2, not enuff to be worth the work.
i would like to see you fab up an intercooler set up, that would probably get you your 9psi but it would cost alot of money and be a pain to set up. seriously now, just put the 6psi pully on there, a 5psi might even make more sence untill it cools off a little. good luck.