[Walt Fricke]

Wil

There have been some other discussions about the design of the Porsche hot air ducting and valve.

Since I do not believe that cooling the heat exchangers is important, I used to block off the fan exit for the heat exchange system in the engine compartment on the SC (with '74 headers and exchangers) for summer track use. There is a rubber plumbing cap with hose clamp which is perfect for this.

Engine did not run hot as a result, though I did not do careful before and afters, it was before I had an IR heat gun, etc.

But I've never had an issue with rear brakes overheating, so haven't done much other than remove the dust shields.

Craig Watkins had NACA ducts in his lower (and detachable) rocker panels on his GT4 track car 10 or so years ago.

Walt