At last weekends auto x I was only making 6 psi most of the time. Sometimes it would kick up to the full 10. This caused me to spin out once, and I almost lost control a few times.
I changed all check valves to the Dale Clark specials a few months ago.
Pressure and vaccum chambers both check good. I get a hiss when lines are removed with the engine off. I replaced all the lines around them when I did the check valves earlier to take care of a previous boost issue.
I can get full boost on the highway, or if I start out, let off the gas, then hit the gas again.
I'm thinking I got a lazy turbo control solenoid. Any other ideas?

 

If You Still Have The Stock Intake Check The Inlet And Outlet Plastic Pipes, They Are Known To Split, Mine Did And That Was What Was Happening, The Inlet Pipe Split Down The Middle I Could Stick My Finger In It.

 

sorry to get off the subject but i thought that i would pop in and say hi to larz.. i was the fd owner that came and talked to you at the auto x event . ive never been to an auto x before, i cant wait to finish rebuilding my motor so i can give it a try next year.

aside from your boost issues how did you end up doing overall?

as for your boost issue i notice that you are still running the stock ic and radiator i was just curious if that could have caused some of you boost issues since it was hot as hell that day. im running a different ic and radiator but i still notice a drop in pressure on a nice hot day.

 

You need to replace the check valve that leads to the pressure chamber or possibly the hose or tank has a split in it. Something is leaking causing you to loose pressure.

 

I'm running a koyo radiator. I did alright, getting 59s. An SRT beat me in index times.
I did the "hiss test" on the chambers. They appear to be intact. I'll double check them. Whenever I've had a boost leak, it has caused me not to be able to build to pressure at all. I've had a coupler pop before and that's what happened.

 

my bad. sorry for the mix up