Turbo boost defueling point? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 06-22-2013, 02:41 PM Thread Starter
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Turbo boost defueling point?

Does anyone know if there is a exact point (boost PSI) at which the computer (02 f350) will defuel a chipped up engine?

ie When do you need to add a boost fooler to keep the computer from overriding the chip?

thanks Fletcher

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post #2 of 9 Old 06-22-2013, 02:53 PM
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IIRC it's 24PSI.



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post #3 of 9 Old 06-22-2013, 03:19 PM
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yep, 24. i just got my ww2 on and that is where mine is cutting off. any particular brand better than another?

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post #4 of 9 Old 06-22-2013, 03:28 PM
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Driven Diesel Overboost Annihilator
Riffraff Diesel: OCR - Overboost Code Regulator

Those two look the same. Seem to be able to regulate them.

Idk why but I like this one more.
http://www.dieselsite.com/boostreliefvalve.aspx



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post #5 of 9 Old 06-22-2013, 03:36 PM
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i guess i have some more money to spend.

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post #6 of 9 Old 06-22-2013, 04:01 PM
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Don't half decent tunes prevent the defuling symptom?
I took my boost fooler off and the truck runs better.
The CEL comes on all the time, but the truck is definitely stronger for some reason.

PIS 175/80's, Van Turbo with EBPV, BD Billet Wheel
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I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #7 of 9 Old 06-22-2013, 04:13 PM
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Quote:
Originally Posted by SCDEALER View Post
Does anyone know if there is a exact point (boost PSI) at which the computer (02 f350) will defuel a chipped up engine?

ie When do you need to add a boost fooler to keep the computer from overriding the chip?

thanks Fletcher
Contact your tuner and ask them what it's set at. I think all of the tuners remove defueling altogether, but they could simply raise the point at which it occurs. 24psi is the factory defuel point, and if you're running a stock turbo, it coincides with the waste gate dumping point as well.

Valid safety positions if you don't want to grenade the factory turbo. If you were to upgrade the wheel or the full housing, then the safety points change and everything factory becomes null. There are ways to get more boost out of a stock unit, but anything above 30psi starts to get dangerous (longevity wise). If you want more boost, change the wheel or housing. Aftermarket will spool up faster and boost higher. Pushing stock to the limit is nothing more than polishing a turd.

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post #8 of 9 Old 06-22-2013, 05:42 PM Thread Starter
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Thanks for the replies. I have a TW chip and it seems to pull back when the boost hits 26psi, just wanted to confirm what I suspected.

2002 350 4X4 Dually Crew Cab
S&B intake
Edge Evo2
TW 6position chip
stage 1 Injectors
ATS turbo Housing
4"Magnaflow turbo back stainless exhaust
Rear load leveler Air ride
Rancho air adjustable shocks all 4 corners
B&W goosneck hitch
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post #9 of 9 Old 06-22-2013, 07:51 PM
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Quote:
Originally Posted by SCDEALER View Post
Thanks for the replies. I have a TW chip and it seems to pull back when the boost hits 26psi, just wanted to confirm what I suspected.
Email them and see what's up. I would guess that your waste gate is opened up and that's what you're feeling. Is it blowing smoke?

2002 F250 CCSB 4x4
PHP Phoenix, John Woods VB, NUC bypass, 6637

"No country can be called free which is governed by an absolute power;
and it matters not whether it be an absolute royal power or an absolute
legislative power, as the consequences will be the same to the people."

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