.484 purple shaft grind info.

Let me use what your saying in this comparison of cams.

MOPAR PURPLE SHAFT>>.850 x 284 ADVERTISED DURATION =241.4 @ 50

COMP CAM XE284H>>.750 X 284 ADVERTISED DURATION=213.0 @ 50
No... You cannot use arithmetic to calculate the Comp's druation at .050. Only Direct Connection suggested that.

The XE284H is not 213.0 @ 50 (WHY?) It's being measured the same way.
No it's not being measured the same way. Both brands list duration at .050. Only Direct Connection says you can calculate it off max lift. Comp is BEING MEASURED. Not calculated.

Some company's measure their cam at .750 still,and i understand that, and thanks for letting me be reminded of that.
No, no cam company uses math (meaning lift mutliplied by whatever) to determine lift at .050" other than Direct Connection.
I think what i picked for an example ,plus the information in the victory tech papers, somehow got us pulling the rope against each other.
Where both correct.
We just were getting are lines of communication messed up.:cya:

I disagree. You are taking one brand's recommendation and trying to universally applying it. Not to mention the fact that many modern cam lobes dont even have the same shape on the opening side vs the closing side.. So the duration at .050 it even less accurate.

PS - because the Comp has more lift (.507 vs .484) the Comp is a bigger lobe even with the same advertised numbers at .050.