Eric's cam challenge

PRH said
This spring I had a customer who thought there was a problem with a BBM roller I’d sold him.
I had Comp run it thru the Adole 911 laser camshaft measuring machine……..way more accurate than a cam dr.

That particular cam measured out excellent, not just the lobe accuracy, but bearing roundness and runout, lobe runout, bank angle accuracy, etc………he had other issues.

What I found interesting is Eric was comparing data derived from two different machines.
I wonder if he would accept flow numbers from someone else’s bench, or if he’d want numbers from his own.
Oh wait, we know the answer to that.

I can only think of a few of cams that I measured that strayed pretty far from the specs on the card.
This was like 25 or so years ago.
One was a Herbert roller for a SBC, and two were NHRA stocker cams for a Pontiac.

How many MP cams have you measured? Back when I was building a good many engines, I measured all of them I used, whether MP or some other. What I found interesting is, after the MP cams were "redesigned" sometime in the 80s, that's when I started seeing their number skew way more than normal. I don't know if they changed their measuring practice or not, but that's certainly what it seemed. I know they "said" to use .850 instead of the industry standard .750 for figuring duration @.050", but I never found that accurate anywhere near 100% of the time. It almost seemed as if the redesign was more of a way of keeping their camshaft information proprietary. Maybe I'm putting too much of a conspiracy spin on it, but I don't know any other explanation.