Originally Posted by J1mbo

on a t4 car running 32psi we were seeing progressively rising charge temps untill they were upwards of 43/44 degrees when running full chat from 2nd to fifth and climbing. this was on a top feed airtec.
i have a pro alloy made cooler on mine using the same core as spec r and i have none of these issues. it is a very good core.
the pro alloy rs500 cooler ime seems to fair better than the top fed airtec.
it could have been an early model if they have changed since then but my findings were that theyre inadequate above 500 bhp for sure.

ps it was a warm day, high teens iirc nothing like were having atm.