Ok so I got tuned last week. Car is putting down 38 psi but tapering down to 33 psi on the ef4. My boost starts falling about 6500 all the way to 33. Im currently running a 18 psi wastegate actuator I know a 25 psi actuator would hold a little more but forced performance says it will fall flat to about 35 psi. My question..has anyone ran a 25 psi internal wastegate and held up to 38-40 psi of boost without having to go external??thanks..

 

bump