Maybe its not the radtec then... I cant seem to get the rad to sit perfectly square, one side sits back more than the other! I thought the turbo cooler would cure the prob but it hasnt made any diff, which would suggest the turbo isn't working overly hard and getting too hot (at 0.8bar i wouldnt think it should lol) Im running an Orion bumper will a full size number plate, i thought about maybe trying it with a smaller plate and/or modding the bumper if all else fails and it proves to be an airflow issue!

What about sealing the IC to the rad in some way?