Degreeing Cams

[djracing]

Has anyone ever used the up 50-down 50 to set the cam centerline A buddy of mine who builds race car engines does it that way.

[funny1]

If you mean .050 open and .050 before closing---yes

[djracing]

.050 before maximum lift and .050 after maximum lift

[funny1]

Lobe center is the halfway point from opening to closing.That way will work sometimes.On some bikes(suzuki GS for sure) the lobes are NOT symetrical.On a old kaw either way will net the same centerline cause the lobesARE symetrical---notthe caseif they are not symetrical like a GS.If you check it both ways you will get 2 different readings on non symetrical cams.On a old Kaw--centerline of the lobe is also the point of max lift--so either way will work---confused yet


If the lobe is not symetrical and you do it like you mention--.050 before and .050 after max lift---you will findat what degreethe lobe is at full lift but not centerline of the lobe----follow me so far


I use .050 open and .050 before closing on all

[1229 suzuki]

on a non-symetrical cam , like in the gs motors, find max-lift of the lobe, zero out your dial indicator, measure .010" or .020" on both sides of max-lift, add your numbers , devide by 2= lobe center, assuming your using a big 180 degree wheel, more accurate, you can then check it by finding your max-lift, then look at the wheel, it should be within a degree of what you set the cam to !.