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General Buick Tech / exhaust pressure forcing opening waste gate stock actuator
« on: July 09 2016, 12:32:19 PM »
Has any experienced this issue. I have been experimenting with a new setup and using a grainger valve (manual boost controller) I built. I have the factory waste gate with the typical cut and threaded rod. When I installed the manual boost controller I also loosened the tension on the waste gate rod. I set it to where i only need to tension the spring the diameter of the hole to hook the rod onto the flapper arm. I can't get higher than ~20 psi even when I bottom out my manual boost controller. I was able to make adjustments and get a response until I got up near 20 psi then no more.
I am thinking the exhaust pressure may be forcing the waste gate flapper open. I had never ran this loose on the waste gate adjustment before. I am going to try to increase the tension on the actuator and see what the result is. Also I will pull the grainger valve off the car and test my last adjustment with air compressor. It is going to rain today so I don't know how much road testing I will be able to do.
Any one experienced this before? Any other ideas or something I am missing that is not letting me exceed 20 psi?
I am thinking the exhaust pressure may be forcing the waste gate flapper open. I had never ran this loose on the waste gate adjustment before. I am going to try to increase the tension on the actuator and see what the result is. Also I will pull the grainger valve off the car and test my last adjustment with air compressor. It is going to rain today so I don't know how much road testing I will be able to do.
Any one experienced this before? Any other ideas or something I am missing that is not letting me exceed 20 psi?