Hey mate,
I have a massive turbo setup on mine, pushing massive boost... I no my turbo can be water cooled but can your supercharger. From what i read above you have a supercharger im assuming... I have a manual Accent LC2 however im actually running the automatic radiator. To be honest keep it big and lower you thermostat to a cooler one about 71degrees centergrade (170 farenheight). In this instance bigger is better. If you cannot spare the room however, have you though about getting a narrower but alot thicker custom made one made?
Cheers Ryan
Also if you want to read about all my dramas in the aussie Hyper Australia pages... it may just help you out...
Hyper Auto Club • View topic - Project Boosted on Speed & Sound