I have a 1998 GST and when i run it hard the collant seems to boil and steam really bad... I will list my mods to the car and maybe you can help me out with keeping it cool...

Force Performance EVO III Big 16G turbocharger ported
XS power front mount intercooler (FMIC) 24"x12"x3" end to end is 30.5"
inlet/outlet 3" rated for 700hp
injen intake
Fidanza aluminum lightweight flywheel 7 bolt
ACT 2600 MB1XTSS extreme clutch
Greedy Trust exhaust system turbo back
3" down pipe
External o2 dump
Greedy FMIC pipes
NGK spark plug wires
Prothane motor mount
255 LPH Walbro fuel pump
1g head w/ cometic head gasket, and intake manifold
steel braided clutch and oil line
ARP head struts

I was running it at 21 psi until it started over heating now i turned the boost controll all the way down... PLEASE HELP IN ANY WAY... thank you for your time...