wookie@alice.UUCP (07/12/83)
Shifting trades off two types of load on the engine. When the engine is lugging along pulling a heavy load up a hill at low RPM the connecting rod bearings and the main crankshaft bearings are very heavily loaded by the pounding of each cylinder. When the engine is revved up to high RPM the wear on other parts of the engine such as the cylinder walls and valve train is increased. For most modern engines I would definitely choose higher RPM than lugging the engine down. Keith Bauer White Tiger Racing