Inliners International Forums General Discussion Hi Performance 'safe' compression ratio on pump gas, 292.

In practical terms, the static CR cannot be increased enough to overcome loss of low speed torque with a late intake closure.
You can get the DCR to match, but the same CCP is acting on a smaller cylinder (using only the stroke length from the IVC point).
A mild 292 (8:1, IVC 37 degrees) CCP = 150 lbs., the cylinder volume is 270" with the remaining stroke. Estimate torque @ 1,000 RPM: 288.
A warm 292 (11:1, IVC 82 degrees) CCP = 150 lbs., the cylinder volume is 188" with the remaining stroke. Est. torque: 199.