Any successful radiator in engine compartment conversions?, Or other than front trunk installs? Options

[Mueller]

I know this had been tried 7+ years ago, I was wondering if since then has anyone done a watercooled conversion and not put the radiator in the front trunk?

[Chris914n6]

I crunched some numbers.
Based on a few sedans I have available, the point at which the airflow through the grille surpasses the fan cfm is about 15mph. In part throttle low speed around town normal traffic driving almost anything near OEM design will seem adequate. It's at freeway speeds where a higher engine load and increased heat generation takes it's toll. It's the hours on the highway at 2/3 throttle where you'll see temps creep up because you don't have 5x or so airflow forced through the rad.

My 914n6 is an exception. I have 2x 1390cfm from the fans and my break even point is 40mph. But I also have a little oil cooler on the firewall and the SE spoiler lets air flow along the hoses. The ecu triggers 2 speed fans at 203F and 212F. Cruising at 80mph I'd be toast without the forced air.