hi i am having problems building boost in my 87 gn. the car is all stock except for exhaust and diy alcohol setup with TT chip. i cant build more than 18-19psi, i dont even have my wastegate hooked up. the turbo has a little up and down but no in/out play and spins freely. could i have a boost leak, how big of a leak would cause to losse out on 8-10 psi? how big of an exhaust leak could cause this(obviously i have a cracked header).
not building full boost, no in-out play
- Thread starter 4-71/Z-28
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
I don't understand what you mean when you say you don't have the wastegate hooked up?? How can that be????? Do you mean you don't have the wastegate solenoid hooke up?????
This is a very confusing post!!
You say the car is all stock. Does that also mean a stock non adjustable wastegate actuator???
You elude to the fact it used to make 29# of boost by asking where the 8-10psi got lost. I hope you're weren't making that kind of boost on nothing but alky!!!
MORE INFO
johnplogii
Senior citizen
- Joined
- Aug 13, 2005
- Messages
- 1,978
Maybe your spring in the wastegate is weak. You could wire it shut to be sure just watch the boost REAL close & make sure you have good gas in it. If it makes more boost you should be able to get by with an adjustable wastegate or a heavy duty 18# wastegate.
that makes sense, ill try that. also ill check the diaphram in the actuator. me and a buddy came to that conclusion last night that if its a weak spring and the actuator was leaking then it wouldnt make a difference weather the actuator had a signal line hooked up or not.
