Originally Posted by Thedriftbadger

Lots of shit coming lol.
Did you retorque the head studs? The head could be lifting under boost if the studs are loose. I believe you have to tighten them in stages, if you just slammed them down once and that's it then i'd bet they are not tight.
What bumper are you running? It could be as simple as not enough airflow to the rad. With the intercooler and condenser in front of it you need to get as much air to it as possible. That's why you see some people cutting holes in their bumper.
Make sure the fins on your condenser aren't all bent up. If its beat up with a lot of bent fins it will stop a substantial amount of airflow to the rad. Get a comb and straighten them out
Make sure your rad hose(s) aren't collapsing under acceleration.
Under drive pulley's are the devil, ditch them if you have them.

Just throwing shit out there for you to check.