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Craig 930 RS Craig 930 RS is offline
Me like track days
Craig 930 RS's Avatar
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,205
Yep, big difference for me, too. Just not big *enough*.
I've screwed with this stuff for many hours.

Very, very difficult to seal up the engine compartment. Next to impossible with way too many gaps everywhere. As Brian did, let the engine fan draw air over the air filter gap so that inlet is within 14 degrees of ambient (mine). Shroud the rest.

Installing fans is fairly easy, about a 2 hour job start to finish, switch and all.
Dyno runs with sensors etc usually require the lid open and a 110v fan should be strapped to the IC for these runs anyway. Gratifying to see IC temp increases of only 15 degrees after a dyno run. Then they'd go right back down.

All this said, shrouding is a great first step and all that is required for most folks.
Fans will get rid of 'car sitting after engine running' heat buildup - very quickly .
- Craig 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
Old 02-11-2009, 10:10 AM
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