me and my buddy are building a 84 carpi and we just got our new t3/t4 turbo. the t3 on the car was cracked and we picked a t3/t4 to replace it. where not sure what typ of wastegate to go with . we want to run around 20 psi should we go with a external wastegate. if we should can any of you guys/girls explain how to install one. where both new to the turbo game.
They are all over ebay, any turbo shop will have them, etc. The boost level is controlled by an adjustable boost controller, the gate actuator just decides the minimum boost, not max.