I have a 2.3L TVS blower pushing 22 lbs making 690rwhp/644tq on 93 on my 04. I'm currently running an AFCO dual pass H/E with the dual 8" fans and I'm still not getting enough cooling power to keep the IATs down while I autocross/road course my car. My plan is to add a VMP triple pass H/E with dual 11" fans (in the trunk) to the H/E to add more cooling power and capacity (two more gallons of coolant plus the capacity in the lines). My question is what type of pump should I run and should I keep the current stock pump in the system? Here's a link to the triple pass H/E if you've never seen one before.
http://www.vmpperformance.com/VMP-Dual-Fan-Triple-Pass-Heat-Exchanger-for-Mustan-p/vmp-hedual.htm
http://www.vmpperformance.com/VMP-Dual-Fan-Triple-Pass-Heat-Exchanger-for-Mustan-p/vmp-hedual.htm