Compression Ratio of an Engine Cylinder

Compression ratio is often used when speaking of an engine cylinder to calculate the performance of a gasoline or diesel engine.  The volume of the cylinder determines ratio, when the piston inside the cylinder is at the bottom of a stroke and the volume at the top of its stroke.  Usually determined in cc’s for example described as 1000:100 or a 10:1 compression ratio.

A higher compression ratio results in a higher thermal efficiency from the air fuel mixture resulting in more power.  Too high of compression ratios can subject a gasoline engine to engine knocking, pre-ignition or inefficient detonation of fuel mixture.

Low cylinder pressure or ratio can indicate old and weak rings, cracked or blown head gasket, cracked cylinder, burned valves, worn cylinders or oval cylinders, sticky valves, worn or broken valve springs, bent or broken push rods, worn or bent rocker arms, and even collapsed lifters.

Rebuilt Engines Store tests each cylinder for compression ratio and then bench tests each individual engine to ensure maximum performance.  Purchasing a rebuilt/remanufactured engine from Rebuilt Engines Store results in all cylinders performing at the top compression ratio giving you maximum fuel efficiency and higher performance in your rebuilt/remanufactured engine.  We are so sure of our engines that we offer an unbeatable 10-year/100,000 mile warranty on every diesel or gasoline engine that we rebuild.  So when it comes to purchasing a new, used or rebuilt/remanufactured engine, purchase one from a company that stands behind its craftsman with an unbeatable warranty and has ensured the success of your crate engine by bench testing its performance and reliability.