As many of you know I recently had an sts rear mount turbo kit installed on my 05 5AT Z. I wanted to get an elctronic boost controller for several reasons. First I have a defi boost gauge which is "supposed to be" top of the line. While the gauge itself is nice it tends to read a pound or so high which i don't like at all for obvious reasons. Another issue that I was encountering was that I wouldn't hit full boost in first or second gear only 6psi or so (7.5 psi target). The last thing was that each time i would shift iat WOT the boost would spike anywhere from .5 psi to 1.5psi so this to me was unacceptable.

I thought an electronic boost controller would be the answer to my problems and while, overall i like the AVCR it didn't solve my problems at all. I still don't hit full boost in the first two gears and i'm still getting the boost spikes when i shift. I've researched and the only thing I've come across as a possible solution to the boost spiking is to port and polish the wastegate. Anyone have any experience with this? Also does anyone know of anyway that I can run at 7.5psi through every gear? This is begining to get really frustrating.

 

You are probably going to get ALOT more feedback if you had this in the forced induction section of the forums instead of the stereo section

 

good point. I originally just put it here because it said electronics but what you said makes since