340 Cam
Let's just look at the difference between measuring duration at a .006" valve lift versus .008" valve lift.
Imagine putting an dial indicator on an valve. Turn the engine until the valve moves up .006", then continue until its lifted .008"
If we magnify the begining of the lift, it looks like this.
The take away is that Chrysler cams at .006" have more duration than stated in the Chrysler books.
When comparing Chrysler cam durations to non-Chrysler cams, the closest equivalent will be durations given at .008
Maybe this will help.
Let's just look at the difference between measuring duration at a .006" valve lift versus .008" valve lift.
Imagine putting an dial indicator on an valve. Turn the engine until the valve moves up .006", then continue until its lifted .008"
If we magnify the begining of the lift, it looks like this.
The take away is that Chrysler cams at .006" have more duration than stated in the Chrysler books.
When comparing Chrysler cam durations to non-Chrysler cams, the closest equivalent will be durations given at .008