watching 50hp coming up on the screen!
Well, approaching that!! has run a 13.4 1/4 at 102 with high gearing (equal to a 22T) on std cam. 50hp might be ambitious.You're expecting as much as 50bhp??
highdesert wrote:Anyone know how many degrees are the lobe centers for a Megacycle 5600 cam?
hi ken,can you explain what you mean by lobe seperation angle,im nowhere near a cam expert,but im under the impression from what ive read on the subject that lobe centers is just another way of setting cam timing,and probably the best,but it does,nt really tell us if a cam is hot or not,my 4s cam timed by conventional method then checked by lobe center method comes out at roughly 99 deg inlet 104 exaust,ie inlet valve is fully open at 99 degrees atdc exhaust fully open at 104 degrees btdclcrken wrote:highdesert wrote:Anyone know how many degrees are the lobe centers for a Megacycle 5600 cam?
The lobe separation angle for the 560-00 cam is 104.5 degrees. When the cam is timed to Megacycle specs, the intake lobe center is 104.5 degrees atdc, and the exhaust lobe center is 104.5 degrees btdc.
FWIW, the lobe separation angle on the 4S cam was specified as 101.5 deegrees. The one I measured back in the '70s came out at 102 degrees.
Of the Norton cams that I have measured, the widest lobe separation was 106 degrees, on an old HPI #7 cam, and the shortest was 100 degrees, on a Sifton 460 cam. Both of those were serious race cams, and both worked pretty well in race engines. Even with the difference in lobe separation, they had about the same amount of overlap, because the Sifton had more lift.
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