[s-cars] Overboosting.

[Tom Mullane]

Folks,
 I have a strange problem with my 95.5, and I can't seem to get to the 
bottom of it. The car will overboost to 30+ psi in fourth and fifth gears. I 
assume it would do the same in the lower gears, but it accelerates fast 
enough so that pressure is unable to build to these levels.
 Some background: The car has 82k on the clock, RS2 EM and turbo, Stromung, 
34 lb/hr racetronics injectors, stock MAF, Hyperboost BPV, and Mihnea's 
custom tuning. Wastegate spring is at the factory setting. There are no 
boost leaks or ingition problems. Since Marc S is running a nearly identical 
set-up (034efi turbo and stock exhaust are the only differences), I have 
been swapping parts back and forth between our two cars, attempting to 
isolate the issue. Marc's car runs about 26 psi.
 So far I have: 
Reverted back to Minhea's "off the shelf" standard chipset for the RS2/34# 
combination
Swapped ECU's 
Swapped the altitude sensor
Installed a new WGFV
Unplugged the electrical portion of the WGFV and observed 7 psi max boost
Swapped the wastegate
 Since I just recently started running an installed boost gauge, I have no 
idea how long this problem has existed. I suspect it was there even last 
year when Mihnea tuned the car. Before we went out, he had he uncap and 
crank the WG down 3 turns, but after the tuning he told he to crank it back 
out 2 turns.
 I'm running out of ideas. Anyone?
 TIA
 Tom