If you tuned the intake and exhaust you could get some awesome
volumetric efficiency numbers.  We get so used to having a port
obstructed with a poppet valve. . . .

Looks like it would be hard to get intake/exhaust overlap with adequate port
area to take advantage of resonant tuning.

Check out another scheme to rid the world of poppet valves:
http://www.sixstroke..com

Larry Wiechman

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