Aluminum vs Iron compression on pump gas

To copy and paste is easy. Actually, a peice od cake.. Now that BJR posted up the RPM range, it sounds right, like I seen it before. I know I seen it before but just can't remember where I seen it or remember it when the post came up.
Even though I agree that's the range Mopar gave it, I don't dopubt for a second it'll go to 7,000.

If you compare duration @ .050 numbers, they all fall within the intakes RPM range preety much. Do note that the MoPar cams have the highest lifts and durations are calced at Advertised duration X .850 making them a preety quick ramp cam with superoir lift. Not all of the Comp Cams listed rise that quick while others rise quicker. This cn be seen in the difference in the advertised duration vs. the duration @ .050 difference.

Not the XE Hi-Lift cam is very aggressive in it's numbers but is softened by the Hyd. lifter which broadens the RPM band. (That's a hyd lifters advantage.... in a way. LOL, the pro's and cons of cams.