Non-Cam Valves

[Robert W. Hughes]

The exhaust valve is also a special problem. The pressure in the
cylinder when the exhaust valve needs to open is in the area of
300-1500psi. A dinky 1.5in exhaust valve has a surface area of 1.75 sq
in so even at 300 psi you need a minimum of 523 pounds force to open the
valve. Bigger valves and earlier opening just make it worse.
-- 
Robert W. Hughes (Bob)
BackYard Engineering
29:40.237N, 95:28.726W
Houston, Texas
rwhughe at ev1.net
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