Quote:
|
Originally Posted by olddog
Since it is a newer block, I assumed it is a roller cam, not flat tappet. The duration you have, if it is a roller, should pull good torque to 6000 rpm. The same durration in a modular pulls to 7000 rpm, but that is a 4 valve OHC engine. Also your torque does not come up until about 2700 rpm, which tells me there is enough overlap to hurt torque down low. More durration will shift that even further up the scale.
|
I wouldn’t think that the difference here is so much OHV vs. OHC, the largest difference as far as flow requirements go is the displacement, 354 ci for the engine in question and 281 for the mod motor. That 73 cubes can make an enormous difference in camming requirements. Have you tried descktop dyno or anything like that to model other camshaft profiles?
Steve