88t2

I've been tring to figure this out for a while and have run out of ideas, so I'm asking for suggestions...

Specs - 94 single, full exhaust system 3.5", turbonetics t-62, ss header, tial waste and BOV, larger intercooler,no emissions, PFC w/ datalogit, 550/1600cc inj, walbro fp, greedy fpr, wideband O2

Problem - Will not build over 10 psi boost.
Have wategate set to 15 (1 bar spring) - it is not opening becasue I would hear it since it is open to atmosphere. Engine seems to be ok - will idle smooth at 950 with 12-14" vac and runs strong. I have checked for leaks by blocking of intake system at turbo outlet and putting compressed air into vac fitting - "holds" pressure for the most part - found one small leak, but did not help. When accelerating at around 3500 it will start to build boost up to 5psi then around 5000 it will get up to 9 and stay there until red line. Had turbo rebuilt - no differece (had some shaft play). I'm running 10.5 - 11.5 a/f during boost.

What could be the problem?


Thanks

nd4spd

I am going reply for two reasons. One to move this to the top and hopefully get a response. Two, because I have the same problem and want to hear the response. My set up is similar except mine is an 87'. Boost on a cold dense day doesn't much above 11 lbs. at 7k. I am sure on a hot day it would be less. My timing is correct and not too conservitive, my turbine housing is small and the idle vac is around 18.

Help us both please.

nd4spd

I am going reply for two reasons. One to move this to the top and hopefully get a response. Two, because I have the same problem and want to hear the response. My set up is similar except mine is an 87'. Boost on a cold dense day doesn't much above 11 lbs. at 7k. I am sure on a hot day it would be less. My timing is correct and not too conservitive, my turbine housing is small and the idle vac is around 18. I should building so much boost so fast, I should have boost control problems.

Help us both please.