Stock Chevy 350 Camshaft Specificationsby Manny Jeter
The Chevy 350 engine was originally released by GM in 1967. It has been featured on the Chevrolet Corvette, Chevrolet Caprice wagon and smaller mobile homes. The engine is still produced in Mexico at the GM Toluca plant.
The Chevy 350 has a hydraulic camshaft and hydraulic lifters. The intake and exhaust valves have a duration of 218 seconds a 0.5 rpm each. Both have a valve lift of 0.457 inches and a total duration of 268 seconds. The lobe center-line specification of the intake valve is 105 degrees, and the lobe separation specification of the exhaust valve is 110 degrees. The rocker arm has a ratio of 1:5.
The two piston rings have a bore of 4 inches and a displacement of 350 cubic inches. One piston ring has a compression ratio of 3.9 to 0.726 cubic inches and the other has a ratio of 4.64 to 0.622 inches. Both piston rings are 1.56 inches tall. The minimum cylinder head's intake diameter measures 1.94 and the exhaust diameter measures 1.5 inches. The connecting rod is 5.7 inches long and has a 3.48-inch stroke.
The three bolts connecting the timing chain to the camshaft have 20 foot-pounds of torque. One bolt on the rod connecting the pistons to the crankshaft has 35 foot-pounds of torque, a second bolt has 45 foot-pounds of torque and a third bolt has 75 foot-pounds of torque.
- engine image by Albert Lozano from Fotolia.com