For the sake of the ignorant (myself), lemme make sure I understand the problem.
tapped into the intake horn, you got readings (as boost would build, the needle would move). We're going to assume they were correct.
Now, with the boost bolt, your mechanical gauge is fluctuating wildly at higher boost? Like bouncing 10PSI up and down?
That is strange for a mechanical boost gauge. I've had my pyro do that b/c of corrosion, but not the boost gauge. I've used plastic tubing on both my boost gauges, and haven't had a problem. I don't suppose there is a kink in the copper line somewhere? maybe?
Sorry, I'm not being very helpful. I'd probably go by Meacham's and let them take a look. They are in Lebanon off Tennessee Blvd near the fairgrounds.
tapped into the intake horn, you got readings (as boost would build, the needle would move). We're going to assume they were correct.
Now, with the boost bolt, your mechanical gauge is fluctuating wildly at higher boost? Like bouncing 10PSI up and down?
That is strange for a mechanical boost gauge. I've had my pyro do that b/c of corrosion, but not the boost gauge. I've used plastic tubing on both my boost gauges, and haven't had a problem. I don't suppose there is a kink in the copper line somewhere? maybe?
Sorry, I'm not being very helpful. I'd probably go by Meacham's and let them take a look. They are in Lebanon off Tennessee Blvd near the fairgrounds.