It feels like the waste gate kicks in and out under full load on 600. Seems that it won't allow for turbo to create high boost psi. Doest the computer regulate fuel according to boost? I would like to bomb this vehicle but computer controls everything. ANy feed back? Thank

 

I'm getting 28 and change. That's with my box off and stock except for the exhaust. Don't know how that measures up to others, but that's what my X-Monitor says.

 

I get 35psi with my va duration box off. I have a banks 4" from the turbo back exhaust and afe intake.

 

A buddy of mine put a 30psi gauge on his '04.5 yesterday and it pegs to 30psi. The truck has less than 500 miles on it and has zero mods at this point.

 

I have pegged 32 lbs on mine - bone stock. Can easily pull 28-30 WOT up steeper inclines. EGTs of 1300 too.

 

Mine jumps up to 35lbs and settles back to 30 psi.....thats going to change real soon tho....