Originally Posted by Xedox 
How is that possible? I thought the logic of turbo exhaust system is that considering after turbo, the more open exhaust the better.
You need some sort of an exhaust at the very least coming off of the turbo to get the gases and hot air away from it. I am talking about a leak directly at the end of the j pipe, also where the front o2 is installed. Running no exhaust AFTER the downpipe or straight pipe all the way back is beneficial. Just check the 3 studs and make sure the nuts are bolted down and the downpipe is fully seated. You will notice a difference if it wasn't, I promise you that.
Originally Posted by 93specv I do have an afpr and fuel gauge. That night at the track I ran outta time to make any adjustments and test them. I got there late and it wasn't Till the 3rd pull I realized there was something wrong. any adjustments now are meaningless to me, SOP hp gain is difficult to determine.
Funny you mention the BOV, some peeps keep telling me to test it. They say to block the vac lines and take a pull to see what happens. It'll either tell me or not after that pull. I will say the BOV releases even after just as minimal of 1 or 2 psi regardless where the adjustment screw is set. I don't recall it being that "light."
The spring in the bov is more dependent on vacuum but if the diaphragm is bad you are experiencing a nice boost leak there. Could be why you are losing psi under load. What is the vacuum at at idle?
Your fuel system sounds fine then and I wouldn't even bother messing with it at this point.
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