Downforce to the rear of a 911 functionally doesn't exist - if anything, it is the lack of, or more accurately , the reduction of - lift.
There is so little 'action' under the wing of, say, a 3.8 tail that it is practically a joke. Not much lift, no downforce, just essentially air 'guidance' (to reduce lift) via the tail itself.
So what will *I* do? A pull fan, under the IC. Bought one a year ago ;-) It does kinda bug me to have the IC air go into/over the engine, but the other solutions seem to have too many oddities and problems. That said, I still think a fully open tail grill with a set of push fans under/or a set of pull fans on top of the IC would work just fine - and provide ambient air to the engine and cool the IC quite well. Hell, I just may give that a shot someday.
So there ya go, that's my dos centavos.
3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Last edited by Craig 930 RS; 11-12-2006 at 07:16 AM..