is it possible to build 28psi with stock tune?

[2000excursion]

Is it possible to build 28lbs of boost with the stock ecu tune? I have 4" exhaust with no muffler or cat which exits before rear tire and K&N filter.

[Strokeorcroak]

highly doubtful!! Im not an expert but thats quite a bit with everything stock

[bravo-man]

no way stock ecu will defuel at about 20-25psi.

[CSIPSD]

like was said above, very doubtful...

[CUMMINS_KILLA99]

why would you want to? and why 28 psi?

[bravo-man]

and at 28psi with stock turbo u r making to much heat you will not see that much of diff. in hp unless you go bigger injectors!!!!

[dmd]

Yep, ditch the K&N too,before your ditch the turbo because of it.

[superduty4x4]

My early bird with a stock PCM, 4" exhaust and 6637 intake would hit 28psi... this is with the wastegate unplugged. Popular opinion is that my truck may not be running stock sticks though... I have no idea if the PO had them modified or not, all I know is they all say AB on the solenoid

[2000excursion]

well I dont have a tuner and Im hitting 28psi with or without the wastegate connected. Id rather build 20psi because it feels like Im not making much more power with the extra psi anyways.