Quote:
Originally Posted by janvos39
Visionary. Do consider to make your engine liquid cooled. Welding a jacket around the cooling fins (only top half of the stroke) with an inlet and outlet tube. Use an electric 12V pump for the water circulation. This can solve your potential cooling problems.
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The head is also a very significant location of engine heat. All the hot combustion gasses are exposed to it and pass through it on the exhaust stroke. On the air cooled Porsche 964 heat management became a problem as engine output climbed from the fantastically durable 911 series motors and leaner emissions produced hotter gasses. It was partially addressed through ceramic coating inside the exhaust port. Commercially available spray-on ceramic coatings have been available to engine builders for several years now for coating piston tops, cylinder heads, valves and ports. These may help in reducing heat transfer to the engine by keeping the heat in the gas, where it belongs.
Engine oil is a good conductor of heat and is used in many air cooled engines to assist in head and piston cooling. The aforementioned Porsche engines were largely oil cooled, the Suzuki GSXR air/oil cooled motors, the lowly GS500 even received an oil cooler, and many more high output motors. I'm sayin' please ensure plenty of air flow directly on the engine cases to keep the oil from getting too hot. If you can find an oil cooler (I think they exist for these motors from the pitbike guys) it would probably be a worthwhile addition.