Since the original poster and I are going down the same path, I will hijack if he doesn't mind.
13xx tunes, opening up the barrel port, valve porting, , and either filling some of the piston to get more power with less pumps, to a point. Or removing a couple threads on the valve and also removing some internal material from the valve, so it holds more pumps for more power with more pumps. With those mods, one may want to beef up the pump linkage pivots.
Quote from: Back_Roads on March 08, 2023, 07:50:48 AM 13xx tunes, opening up the barrel port, valve porting, , and either filling some of the piston to get more power with less pumps, to a point. Or removing a couple threads on the valve and also removing some internal material from the valve, so it holds more pumps for more power with more pumps. With those mods, one may want to beef up the pump linkage pivots.I get what your're saying about the ports and valve but im confused about filling the piston, could you please clarify?