Boost Leak or what?

My friend has a 96 GST and wanted me to post about this problem. He said when he reaches a certain boost level, the car wont go and feels like its running out of gas. I was wondering if any of you have a clue as to what the problem is because hes freaking out. Thanks

what psi is that? it can be if he has a stock t-25 he can be maxxing out the turbo b\c it max out at around 17psi and even lower i believe with stock fuel managment.
1

Depending on what mods he has the problem could be the ECU is pulling ignition timing way back if it sees too much knock. Is your friend just running a boost controller and nothing else? Does he have any fuel upgrades at all? What does he have done to it?

does he have a boost gauge? turbo2nr is right. after 5k rpm or so, boost starts to rapidly drop off because the turbo can't keep up, and he will feel a pretty noticable loss of power, where the rpm's keep going up, but the acceleration is no where near what you think it should be, sorta like loosing gas. getting a boost controller would help a bit, but only a bit.

If it is stumbling/stuttering (I'm assuming so because of the running out of gas comment) it is almost always an ignition related problem (plugs, plug gap, wires, etc) or a boost leak (see www.vfaq.com to make the tester, and test it either way. Everyone should do this, like, now.)

I've been running my car for about a week now with what I think is a boost leak. I'm waiting for my automotive class to get into gear (haha) and take safety tests so I can use their expensive lifts and get credit for it too. Shouldn't be too hard to check for boost leaks, even though the teacher knows little about turbos.