The new cam is better, you just need to play with it more then one night to find what it's going to like. 1st is making sure it don't spin and is on a track equal to the track you ran you old best with. Then you need to dial in the carb for the new cam. Squrters, jets pump cams ect. Make sure the timing is happy and then if it's still soft down low add a little stall.