my 4.7 '08 Ram seems to really pull hard at 4000 rpm and then more at 5000 rpm, it's a pretty drastic change. Anyone else feel that? and if so, how can I make it run like that off idle...lol

 

"powerband"
you wont be able to get it to run like that off of idle

 

^^ yep. All vehicle have their narrow range of powerband. You could get it like that off idle, but then you would lose it all on the upper end. It's called a towing cam. There's gives and takes to cam grinds. Can't have power through all the rpms like everyone would like without superchargers and such.

 

Yep, the cam grind determins where the power will be made