Thread: under pressure

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do not for get rod length plays in the mix . no you can not hold the valve off seat to make a 17to1 engine run like a 8to1 .over lap or holding valves off seat longer any way you cut it the valve needs to seat to help cool it you would have to add another valve for only bleed down . i can not see this working very good. to much over lap or valve timing of valves fuel /air and ex mix will start back up and to revert . a chamber injected/ with a mix cocktail water and ?/ and threw timing span release would be a better way to go instead of a heavy bleed down for CR with valve to piston timing some setups start with a base of lets say 8to1 they move cams to gain power cam timing so the dynamic CR changes only cam or cams are moved on some by oil psi can do not forget the PV of valves will change to