lunati street master cam
I think Lobe Seperation Angle and Intake Centerline Angle are being blurred here. The overlap period is a function of rate of lift and lobe seperation angle. A steeper rate of lift on both intake and exhaust will naturally have a greater amount of overlap unless the lobe seperation angle is increased. To have the steeper ramp, and cut the overlap down slightly, the LSA is widened. This is conjecture on my part, but I think that is why Comp has everything in that series at 110 or 112°. Intake center line in relation to crank degrees is what give the low end pop. Close the intake earlier in the up stroke, the cylinder develops more pressure. The problem has been that with a symmetrical lobe, you cant close the valve early without opeing it earlier, causing more overlap. The newest asymmetrical lobes I'm told help address this. I havent really looked into them. So Hughes likes to have a 108° intake centerline..what is their lobe sepration angle at? Still 108°?