Boost Build Up But No Power

[The_one]

Hi DSM Tuners,
I have a problem related to boost and power output that i need some assitances with. Whenever, i drive My 95 AWD TSI i can hear, feel, and see the boost is building up by the Turbo (small 16g). But for some odd reasons the engine can not obtain that boost from the turbo. I drove my brother stock 97 gst and i could feel his car has more power output than mine. His turbo build up boost faster than mine too

Things i did/checked:

1. Boost Leak Test (Leaks Fixed with Silicon RTV)
2. Compression Test (Good, 130psi on all 4 cylinders)
3.


If anyone knows how to diagnose this problem. Feel free to post


Thank You Very Much

Vu

 

[The_one]

Good info MyBeatGSX. I'll have to search around for high altitude compression numbers (I'm at 7500ft).

I found out something quite useful today w.r.t. boost leak testing. Doing the test on a warm motor makes a HUGE difference. I was leaking 1psi/second out the VC breather due to blow by and/or valve stem seal leaks on a cold motor, but I got 1psi per 5 seconds on a fully warmed up motor. Good to know when you think you got all the leaks but get too much coming out the VC breather.

Here is a link that related to doing compression test at high altitude
http://home.comcast.net/~saramasters/performance.htm