[P@blo]

The question I had earlier was would a narrower lobe matter if it was trimmed off the rear portion of the lobe?

I might be not thinking of this correctly but if the lobe was 0.70", it would not change the lobe/lifter face contact area one bit. More contact area would be properties of lobe taper and lifter crown machining would it not?

Might be chasing waterfalls here...

[Jay S]

Originally Posted by P@blo

The question I had earlier was would a narrower lobe matter if it was trimmed off the rear portion of the lobe?

I might be not thinking of this correctly but if the lobe was 0.70", it would not change the lobe/lifter face contact area one bit. More contact area would be properties of lobe taper and lifter crown machining would it not?

Might be chasing waterfalls here...

It is like chasing waterfalls. CMC just has one core available for all the off the shelf Pontiac cams. 066 or a 041, is the same core if it is from CMC. If it is custom I think you can get a better core. Not sure how long that will be an option though.

The narrower lobe is all off the front.

The crown and taper are suppose to be matched, they often aren’t, but it is usually the lifters that are the problems.

Less tapper and crown is sometimes used for higher spring pressures. Mopar 440 six packs used special cams with less taper and less lifter crown for higher sustained RPM’s and more spring pressure. You can’t mix their lifters or cams with standard cam componets. Crower actually sells what they call flat face lifters for some applications. I think they still have a slight crown, just not as much as a standard lifter. I am not certain though, they could be flat, I have never had any.