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Old 06-11-2003, 08:50 PM
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Join Date: Feb 2002
Location: MORDOR
Posts: 19,679

Originally posted by spawn
very nice but sadly this is out of my budget.

Q, why have a round exhaust manifold when the exhaust outlet is kinda oblong-square shape?
I have read somewhere that says that by making your exhaust port the same shape as the exhaust poort on the crankcase, you would contaminate the incoming fuel mix. This is bad for performance. If you make both the exhaust port on the sleeve and the exhaust port on the crankscase round, the exhaust port on the sleeve would get smaller and smaller when the piston moves upwards thus reducing performance of the engine.
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