Originally Posted by
James @ M Developments.
I`ve mapped quite a few cars on the Airtec top feed cooler though, and even at over 36psi on GT30s the Inlet temps were only a max of 5 degrees over ambient on the dyno, most of the time the were only 1-2 degrees up on ambient and thats sat on a dyno run after run after run while mapping.
Thats far from bad so i dont see what all the fuss is about. The cheaper one works really well and i wouldn't hesitate to fit one to any car.
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.