the chevy flat plane crank is a key component in the chevrolet engine. its designed to provide precise cranking and great fuel economy. This crank provides power to the engine by alternately moving the flywheel and piston up and down. As a result, the engine turns at a steady speed that provides great efficiency. Learn more about how this motor works in the following post. A flat plane crankshaft operates by rocking back and forth. It is very similar to the swingarm on a motorcycle. The engine cylinder is attached to the arm on one end and the crank on the other. https://www.totalperformance.net.au/chevrolet-flexplate-shim