anyone tried one of these?
http://www.demon-tweeks.co.uk/catalogue/product_detail.asp?PCODE=DEI080110&GRP=MP040&PGRP=M003&CLS=MSPORT&code=DEI080110&from=search
Ford USA were playing with something similar on the F150 Lightning concept pickup truck..
Not satisfied with 500bhp and 500ft/lbs, they were using the air con system to chill a small tank of refrigerant down to just below 0DegC. A light on the dash indicates when the tank is ready, and when you hit wide open throttle, it dumped the refrigerant through the intercooler, giving a 50bhp booost for about 30-40 seconds. The system would then take about 2 minutes to recharge.