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WinRice WinRice is offline
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Join Date: Jun 2005
Location: Colorado
Posts: 700
Originally Posted by drmatera View Post
So as long as the intercooler doesn't restrict the air feeding the engine fan it would be wise to have the intercooler core sized exactly the same as the "grill" on the tail and seal them together. But it does seem that on a high speed run the intercooler would heat the air that feeds the engine and cause it's own set of problems...
It does that anyway, to a certain degree. No matter how big or small the IC is, most of that heated air flow coming off of it will find it's way into the engine. Since our engines are sealed to the body, any air coming in the rear grille only has one way out. If the IC is totally sealed to the grill, forcing all the air through, then all the heated air goes into the engine fan. If we only seal it to half the grill then we get a mix of heated air and fresh air. What's the best mix? Who knows without some testing.

Steve Weiner made the comment in a thread some time back, that it's counter productive to pull all that air through the IC then dump all that heated air into the engine, increasing head and cylinder temps. Although, this works for a street car since we aren't creating heated air until short bursts of boost. A track car is a different story.

The ultimate 930 engine would have pure fresh air to the engine fan and air filter, plenty of air flow through the IC for max efficiency, and all this air flow would dump outside the car as not to effect the engine compartment temps.

Wait a second, that sounds like a flat fan 935 with air/water IC's............
1986 911 Turbo
3.3L, K27HFS, Tial 46mm, TurboKraft Intercooler, 964 Cams, Monty Muffler, MS3Pro Evo, M&W Ignition, Zietronix WBO2 Data Logger, Wevo shifter, coupler and motor mounts.
Old 02-11-2010, 09:14 AM
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