Cams for 318's

It's not the rpm it's the limited lift or limited heads
you get more "curtain" area at lower lift points with 30 degrees so you can use a for more area under the lift curve at same duration or use less duration and have the same area
The head shown was maxed out before .500 and maybe near stock lift
I like to get max head flow at as low a lift as possible and keep it there
also avoid turbulence
Now with better heads all changes