Hmm, got my spring in, turned the idle up a bit, and squeezed a 1/4 turn out of the fuel screw....now at WOT, the boost gauge will flutter. It only happens at top rpm's and will flutter very rapidly between 28-32 psi. Anyone experience this?

 

yup. had a thread a mile long about it several months back. removing the itty-bitty nonIC crossover and adding the IC seemed to cure it.....but, I've seen it come back a couple times as of late, so my theory is pretty well shot. I'm sorry you're having troubles...but I'm glad it's not just me

 

Valve float maybe? Just guessing really.

 

Hahaha, I thought they wouldn't float until 4K, funny little spring!

 

They'll float at 35-3600RPM. Get a tach on there and make use of it, or get a set of valve springs.

I've had the boost gauge flutter a little (1-2psi) on the low end of a 91 i had many years ago, but once it got past about 2000rpm, it quit. I think it may have been turbo surge.

Daniel