Author Topic: Step in the exhaust port  (Read 555 times)

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Offline Al Smith

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Re: Step in the exhaust port
« Reply #30 on: November 28, 2018, 04:34:07 am »
This case volume reduction thing could get rather complex .Full circle cranks,more stuffer would raise the crankcase pressure which would increase the velocity  of transfer .Theoretically with decreased volume by lowering the cylinder to raise compression it might not require as much actual crankcase volume .As to  how much remains a good question .With a tuned pipe it's going to back charge part of it back in .With a pressure can it's going to stop the transfer when the pressure rise equals the exhaust out pressure .With a megaphone or open exhaust it would all leak out ---makes my head hurt thinking about it -----

 

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