[masraum]

I've been looking through pics of various engine parts just out of curiousity (you may have seen my thread on conversation pieces for desk) and I've noticed that the fins on some porsche cylinders are radically different. The fins on an early motor like 2.2 are quite different than on the 2.7 jug that I have, but I assume that's due to the different bore requiring creativity to get the same cooling, but what really surprised me are the 3.3L turbo jugs that are FS with nearly no fins



I assume that the sides closest to the other cylinders don't have room because of the larger bore, but what about opposite the side that does have fins? Also, since I can't look at an engine, does the side with the big fins go up or down? I assume up towards the source of the air, but we all know what ASSuME will do for you.

This is pretty much like my 2.7L cyl looks like.


thanks.