Quote Originally Posted by Spaz View Post
wow that is great information. If I build the engine this winter I will definitely look into a 4port
I say its good even for a stock motor! Being able to run 3 psi in first is critical imo to help prevent wheel spin, and on a stock motor you'll probably want to run close to 15 psi in 4th for max power. A 3 port will not be able to have that large a range of control. Also the 4 port is like $60 pretty cheap awesome mod. Just cut out the old solenoid, solder two wires, change the line routing slightly, done!