Finally got gauges and not make much boost? - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 12-26-2008, 03:12 PM Thread Starter
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Finally got gauges and not make much boost?

My boost gauge is only showing 17 psi at wot with my tw on extreme any ideas? It seems to functioning properly, the boost drops every time it shifts?

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post #2 of 14 Old 12-26-2008, 03:28 PM
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Quote:
Originally Posted by Chadahootchie View Post
My boost gauge is only showing 17 psi at wot with my tw on extreme any ideas? It seems to functioning properly, the boost drops every time it shifts?
Sounds about right for an OBS. The boost will jump up some when you install the injectors. JJ

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post #3 of 14 Old 12-26-2008, 04:34 PM
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i got 17 stock. doesnt sound right

1997 f250 HD ex cab sb with southbend 450hp singlemass clutch, 6" lift with 35"s, 3 1/2"down pipe with straight pipe, afe stage 2 intake, tw chip, ccv mod, 17* hpop, 120v idm,vegistroke system V3. (AKA electric fuel for diesel and veg side)
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post #4 of 14 Old 12-27-2008, 12:26 PM
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how many miles on the truck? could be a weak turbo since its an older truck my 95 went from makin 34psi to 22psi of boost with a chip and stage 1's but it had 264,000 miles on it. the 97 i have know with the same exact setup was makin 39psi of boost and i blew that sucka. a lot of boost isnt always a good thing cause i believe the stock turbo in our trucks is only rated at like 25psi

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post #5 of 14 Old 12-27-2008, 12:27 PM
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post #6 of 14 Old 12-27-2008, 12:33 PM
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with raul i didn't think about that tighten the clamps in the intake y pipe and see if that helps other wise if you have one it is the up pipe donut gaskets or could be exhaust manifolds leakin

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post #7 of 14 Old 12-28-2008, 03:50 AM
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Quote:
Originally Posted by Chadahootchie View Post
My boost gauge is only showing 17 psi at wot with my tw on extreme any ideas? It seems to functioning properly, the boost drops every time it shifts?
Seams a little low.
It goes like this, for OBS anyway:
STOCK: 15 psi max.
Add exhaust/intake: 17 psi max.
Add a chip to that: 22 - 24 psi max.
Add Stage-1 to that: 32 - 34 psi max.
And so on...
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post #8 of 14 Old 12-28-2008, 04:13 AM Thread Starter
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If there is a leak shouldnt I see where, cause I dont see any black residue any were around the firewall. My truck as always seemed faster on the tow setting and it make almost 20 psi on it. My truck has 165000 on it so and the turbo doesnt make any usual noise. I am considering diy injectors soon thought.

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2007 F350 axle/suspension swap
238/100 Full Force Stage 3 Injectors
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Tony Wildman Chip
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post #9 of 14 Old 12-28-2008, 04:25 AM
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Quote:
Originally Posted by Chadahootchie View Post
If there is a leak shouldnt I see where, cause I dont see any black residue any were around the firewall. My truck as always seemed faster on the tow setting and it make almost 20 psi on it. My truck has 165000 on it so and the turbo doesnt make any usual noise. I am considering diy injectors soon thought.
It's gonna drop when it shifts no matter what. If you have an exhaust leak depending on where it is you might see the soot. But a boost leak you won't be able to see, obviously.

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Traded in at 196k miles.

"Brand Newish" Truck: 02 Chevy S10 2.2L 5sp. Reg cab 4x2. Badass custom made shifter, foglights, 20% tint, AVS Vent-shades, Stock Intake mods, Electric Fan conversion .
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post #10 of 14 Old 12-28-2008, 05:42 AM
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Your boost will drop off during a shift if the shift is at a lower RPM. What rpm do your shifts occure at ? My truck was shifting early on the 2-3 at about 2950 + or - and losing a lot of boost. I ask my tuner to send me an update on the 2-3 shift to about 3400. Now it only loses about 4 lbs of boost on the shift.
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