is it possible to build 28psi with stock tune? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 04-13-2009, 02:41 PM Thread Starter
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is it possible to build 28psi with stock tune?

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.
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post #2 of 9 Old 04-13-2009, 02:46 PM
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highly doubtful!! Im not an expert but thats quite a bit with everything stock

1996 f350- 615hp/1258tq uncorrected

2008 KR f350- leveled and tuned 569hp/1158tq

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post #3 of 9 Old 04-13-2009, 02:49 PM
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no way stock ecu will defuel at about 20-25psi.

2003 7.3 PSD,PHP fuel-sipper,40,120,140,no-start,diy intake,John Wood VB / GTP 38r at 31-32psi,foil delete,4" ex open,banks gages,banks TC broken,banks power elbow,zoodad,BD wastgate
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post #4 of 9 Old 04-13-2009, 03:05 PM
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like was said above, very doubtful...

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post #5 of 9 Old 04-13-2009, 03:12 PM
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why would you want to? and why 28 psi?

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post #6 of 9 Old 04-13-2009, 03:29 PM
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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!!!!

2003 7.3 PSD,PHP fuel-sipper,40,120,140,no-start,diy intake,John Wood VB / GTP 38r at 31-32psi,foil delete,4" ex open,banks gages,banks TC broken,banks power elbow,zoodad,BD wastgate
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post #7 of 9 Old 04-13-2009, 06:39 PM
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Yep, ditch the K&N too,before your ditch the turbo because of it.

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post #8 of 9 Old 04-14-2009, 06:03 AM
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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

97 F350 CCLB 4x4 PSD
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post #9 of 9 Old 04-14-2009, 07:18 AM Thread Starter
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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.
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