Ok, so I thought I blew my DV's a while ago at the track and I replaced them with billet valves and installed new silicon hoses. Turns out those DV's tested fine and were not the problem.

As was the case before, my car held 1.1 bar on the street only to lose it at the track after a very short period of time. Car will hold around .9 bar in 4th and 5th gear but will not get over .5 bar in the lower gears. Brought it in today as I am finished troubleshooting the car. Any suggestions? I have considered the 911 Tuning boost leak test kit but if my car was loosing boost like that wouldn't it throw a CEL? My guy thinks that is not the issue at all. We shall see....

 

You have a boost leak, the turbo is working harder in the higher gears so able to build more pressure but its still leaking out.