zachu812
New member
- Joined
- Apr 20, 2016
- Messages
- 419
I'm in the process of building a 13mm pump and trying to figure out what pump cam is best to use. I have good 901 cams laying around but the only 903 I have is beat up from my old 13mm pump. I've always heard people refer to the 903 as a "quick rate" cam and act like it's a must have but I've seen the 901 used in 13mm pumps with good results too. 903 cams aren't cheap or easy to come by. Does anybody know the actual difference between cams?