What kinda PSI are ya'll running?? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 19 (permalink) Old 09-02-2011, 04:47 PM Thread Starter
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What kinda PSI are ya'll running??

What kind of psi are ya'll running on your turbos at cruising speed or when you get on it?? My stock turbo hits 29 at full throttle and 10 crusing at 65 on a flat surface. Is this too much?
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post #2 of 19 (permalink) Old 09-02-2011, 05:58 PM
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Re: What kinda PSI are ya'll running??

10 psi is a little too high IMO to be cruising around empty at 65mph. Should be more like 5psi or at the most 7 psi. It should be around 7-8 or less psi at 70 mph IMO as well.

Nate
06 F350 4x4: Non-VGT 67mm Turbo, WPE Big Oil HPOP, HD 215/85s, Race Ported Intake, NB/Warren Tranny, and some other stuff.... 100k miles and counting....

06 F250 2wd: Stock... EGR delete, Race Ported Intake, and a mild street tune.... Leaking HGs
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post #3 of 19 (permalink) Old 09-02-2011, 06:05 PM Thread Starter
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Re: What kinda PSI are ya'll running??

I was thinking the same thing, what would cause it?
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post #4 of 19 (permalink) Old 09-02-2011, 06:21 PM
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Re: What kinda PSI are ya'll running??

You know I am not sure exactly. I had the same problem and still may I am not sure. I tore my truck down to do head studs because I wasnt sure if they were blown or not. Well my head gaskets werent blown and I am finishing putting the truck back together so we'll see if I still have the same problem. I noticed that it did it when ambient Temps got over 80F. I am thinking it is a sensor that was dirty. I know things can get screwy when sensors are dirty. I would start with MAF sensor cleaner and clean your MAF sensor, MAP sensor, and EBP sensor. Hopefully more folks will chime in.

Nate
06 F350 4x4: Non-VGT 67mm Turbo, WPE Big Oil HPOP, HD 215/85s, Race Ported Intake, NB/Warren Tranny, and some other stuff.... 100k miles and counting....

06 F250 2wd: Stock... EGR delete, Race Ported Intake, and a mild street tune.... Leaking HGs
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post #5 of 19 (permalink) Old 09-02-2011, 06:58 PM
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Re: What kinda PSI are ya'll running??

my truck only cruises at 10 psi and at wide open its well over 50. oh wait, I have twins. remember boost is derived from heat and pressure, your cruising boost pressure does not bother me, your wot psi doesn't bother me. we need way more info to tell you if you actually have a problem
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post #6 of 19 (permalink) Old 09-02-2011, 11:45 PM
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Re: What kinda PSI are ya'll running??

my race truck cruises at 0-1 psi lol if im in the throttle i see a 100psi gauge pegged. orange truck is 4-5 cruising and 45 up top.

06 crew cab
06 reg cab

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post #7 of 19 (permalink) Old 09-03-2011, 03:55 PM
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Re: What kinda PSI are ya'll running??

When I had my 64/71/.70 non vgt, I had about 7-8psi at 2000-2100 rpm cruising...perfect.

2003 F-350 KingRanch 4x4
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post #8 of 19 (permalink) Old 09-03-2011, 04:07 PM
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Re: What kinda PSI are ya'll running??

Right 7-8 psi while cruising at ~2000 rpms, which is just over 70 mph on stock tire and gears, is what I would say it should be. But TEN?? (10 psi) at only 60-65 mph with stock turbo and injectors?? That seems high to me and I would be very curious to know what would cause that.

Nate
06 F350 4x4: Non-VGT 67mm Turbo, WPE Big Oil HPOP, HD 215/85s, Race Ported Intake, NB/Warren Tranny, and some other stuff.... 100k miles and counting....

06 F250 2wd: Stock... EGR delete, Race Ported Intake, and a mild street tune.... Leaking HGs
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post #9 of 19 (permalink) Old 09-03-2011, 04:51 PM
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Re: What kinda PSI are ya'll running??

If you're really worried about it, pull the turbo, pull the turbine housing and clean it out really well. It's probably time to do it anyways.

Also, pull your Exhaust Back Pressure sensor and blow down through the tube with a blow nozzle to make sure it's not restricted.

2015 F250 Platinum CCSB-Black on black, 1.5" leveling kit, airbags, 325/50r22 Nitto G2's on 22x10.5 SOTA Novakanes. SCT, 4" downpipe back.
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post #10 of 19 (permalink) Old 09-03-2011, 05:23 PM Thread Starter
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Re: What kinda PSI are ya'll running??

Can you take the turbo off an 04 without pulling the cab??
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