This is only in a perfect cylinder where valves close exactly as These motors really come alive at C/R over 12 to 1, but you have to have lots of quench (.035) and above 95 octane fuel. As a general rule a compression of 135 PSI or better is excellent. Also your post crack me up! My question is, does those numbers look low for an engine that is supposedly 11.1 Compression. What do the C cells of the thyroid secrete? I'm not asking about dynamic pressure, only static, which is just the compression from the top of the exhaust port on up to TDC when kicking the engine over (yes, I know most dirt bikes have a power valve which is closed when kickstarting but its never designed so that it seals against the rings and so it leaks too much to be of any consideration. What is the shape of C Indologenes bacteria? The CCP will drive the need for compression releases. Also Engine should be between 140 F to 180 F temperature for Tests