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Max Sluiter
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Join Date: Mar 2006
Location: So Cal
Posts: 19,572
Originally Posted by Speedy Squirrel View Post
If you have the time and the inclination, Air/Water intercoolers beat air/air interoolers every time:

1. Water is has roughly 10 times the specific heat capacity of air.
2. The water flow can be controlled to the optimal flow rate at all times.

The above means that the engine mounted heat exchangers can be MUCH smaller than equivalent air to air units.

Because they don't have to "flattened out" like air/air units, their geometry can be better optimised for air flow, resulting in less pressure drop.

With an early 930 you could use the fender mounted oil cooler hardware from the later 930's to cool the water.
Why did the Porsche factory prefer air>air intercoolers for the 935? They are better because the ambient air temperature is way less than hot water in a closed liquid cooling syatem. They only went to air>water when they were constrained in space and could not fit the air>air.
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened

Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 08-17-2008, 07:57 AM
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