How many cc's or how much HP before..., needing an external oil cooler in 914-6? Options

[horizontally-opposed]

Obviously, a 3.0-liter SC motor is gonna want an external oil cooler, but what about a 2.4E or S? Will an on-case cooler do the job, or is it iffy?

Also, who is using the right inner fender for the cooler spot on a /6? What size engine are you running and what temperature extremes have you seen?

Thanks!

pete

[ArtechnikA]

the old rule-of-thumb was 175-ish HP.

but a 150-HP engine used exclusively for track events in SoCal/AZ/TX by two drivers is going to need one more than a 210-HP engine in daily-driver commuter service...

i've never seen anyone use the right-fender location in a 914.6 - 914's don't have the ventilation from the horn grille to the fenderwell that 911's do. and the folks that have done airflow studies tell me air doesn't come in the turnsignal tunnel like you'd hope it would, so that doesn't buy yo much either.

a 2,4S is kinda on the edge. i think you'd need it if you spent any amount of time on the track, probably not in street/AX service.