Reply To: Picked up a 4 speed jetfire

[jensenracing77]

Phillip Hahn stopped by today and took him and his friend for a ride in this car. We took off from a rolling start and spun the tires going into 2nd and third both and then I let off because I noticed the boost gauge was way to far past the power markings. I did not say anything to them but I now believe I know the reason my turbo was boosting to 8.5 psi the other day. I had tested the gauge and it was at 8.5 psi just past the power side but not much. Today I noticed that the gauge was buried all the way past where I could no longer see it and it popped the red button on the TRF tank. I believe my controller stem or the bypass valve is sticking. I tested the gauge to see where it was when I could not see the needle and it was at 10.5 lbs. I would assume that the boost limit control diaphragm is also bad because it still was boosting after the red button popped. I will no longer boost with this turbo. The only thing I have ever done to this system is change the fluid metering valve diaphragms. I should have known better with it sitting since 1974… I do have the rebuilt carburetor on a red turbo now. I will install this system soon and set this one aside till I restore it and the car.