Camshaft Torque Friction

[gene41]

Can someone please give me any data which defines app. how much torque is required to rotate a camshaft in a typical chevy small block engine? I am looking for torque (friction - ft./lbs.) in a variety of rpm ranges (1500-6000).

 

[blmcghee]

gene41,
I believe you may have to define the valve train set-up used also. Seems to me that the type of lifters and valve springs would be a factor in torque calculations. Just a thought.