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356-930 356-930 is offline
Acceleration Junkie
Join Date: Aug 2007
Location: Laguna Beach, CA
Posts: 263
Excess fuel fed to a 4-cycle gasoline engine does not in itself cool the engine. What it does is provide for an excessively rich mixture that releases less energy, lowering cylinder peak pressures and temperatures, and produces less power. A secondary side effect is lowering of knock probability.

"What happens to our Porsche’s cooling when we optimize A/F and spark advance with modern electronics tuned on a dyno?" Cylinder peak pressure and temperature increase.

Don't have answer to the question, "What is the limit and location for the air-cooled 911 motor?"
Chris Toy
356-930 Gone
Old 08-02-2009, 11:48 AM
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