After a couple of months I finally got my car pro tuned and it made me realized I really needed a new wastegate. Car was hitting 27 psi but would taper to 19 psi.
Mods
Cobb AP
AMS Widemouth DP
AMS Test Pipe
AMS Cat-back single exit
AMS Intercooler with pipes
AMS CAI
HOA EBCS
Crushed stock bov
Torque Short Shifter
AMS Base/Underhood/5 speed gate selector
AEM water/meth kit (not installed yet)
Tial QR bov (in the mail)

I am new to the forums and can't figure out how to show the pic of the dyno so I attached it. I think a new wastegate will fix a lot of the boost tapering so that's the next thing I am getting. Probably the FP wastegate with 18psi spring since I want to do FP red at some point and time.

 

Stock fuel pump? I'm getting tuned in a week or two and the tuner is trying to tell my the X's need a fp, which I dont believe. The stock one seems to work well until you upgrade the turbo.

Nice numbers.. And a wastegate might help a little, but the problem is the turbo.. The stock turbo on the X is pretty small and can't keep up with the air flow at higher rpms.

 

Yup stock pump. Your right the stock turbo doesn't hold boost at the top end very well but I still don't think I should be tapering that bad. If I can get it to hold 22-24 psi I would be happy.

 

The problem isn't with the pump, it's the injectors. @260ish load level injector duty cycle is around 95% on 93oct.

I wouldn't do a wastegate unless you do injectors, the turbo flows enough to ventilate your block, and you're probably already pushing the injectors to the limit.

 

Uhh, I'm pretty sure the stock turbo generally tapers down to around 18-19 psi. I have yet to see anyone taper above 20 psi above 7000 rpms. The stock turbo is just out of steam up top.

 

I was running the stage 2 map on the cobb and I never saw it hit over 90% duty cycle but I know they are close to being maxed out now. From about 6800 to redline my AFR did dip blow 11 to 1 because of the boost dropping off so bad. I also know its prefered to not push them pass 88% so I might do the cobb 255 pump kit, 850 injectors and wastegate. Thanks for the inputs because that was something I completely forgot to ask my tuner about.

 

Very good result!!Damn

 

Thats what i thought...

 

I have looked at a lot of the dyno charts on here with stock turbo but I have yet to see anyone run an upgraded wastegate on the stock turbo. Does anyone think that might be why it tapers so bad besides me? I am going to give it a shot. Either way like I said before I plan on running a fp red so if I get the fp wastegate with 18psi and it does help no big deal.

 

nice!!!