Help Me Cool Down

All good advice, go with at least a direct 1:1 ratio if you can't go with an overdrive. The last time I looked, March and CFV Racing both had direct V-belt pulleys and CFV carries an alternator and water pump 8 rib serpentine with a 20% overdrive. I highly recommend ditching the flex fan and installing a 7 blade clutch fan or even a fixed fan. IMHO, FWIW, when you have boost, worrying about parasitic loss from the fan on a primarily street car is a moot point anyway. Here's some info from our friends at Flowkooler. Commons Questions about Hi Flow Pumps