What is the MAX Boost from Stock Turbo W/Stock tune? - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 04-03-2011, 02:43 PM Thread Starter
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What is the MAX Boost from Stock Turbo W/Stock tune?

Hi: I just finished installing an X-wheel and a DieselSite TurboMaster Wastegate Control. I triple checked the connection between the Compressor housing and the X-pipe (AKA Y-pipe) and the intercooler hoses. I took the truck out on several 0-60 WOT runs. The highest boost was just under 20psi even after I adjusted the TurboMaster Wastegate Control all the way down.

Is 20psi the most that I can get with a stock tune? I could get 18psi with the stock waste gate controller. I relize that the X-wheel will not increase the MAX boost psi.
Mars


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2001 7.3L, 4R100 auto, CC, DRW, 4X4, X-Wheel, TurboMaster WC, Tymar air filter, Polished X-pipe,CCV-delete, Diesel Site Intercooler and valley boots. Dual Alternators. Gauges, EGT, Boost, Trans temp, Oil temp, Amp meter for each Alt. Mods: A/C heater core shut-off mod, Always Bright Overhead Console, AIH delete, 2WD Low. Stock Tune and Trans.
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post #2 of 12 Old 04-03-2011, 03:04 PM
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Quote:
Originally Posted by mars1952 View Post
Hi: I just finished installing an X-wheel and a DieselSite TurboMaster Wastegate Control. I triple checked the connection between the Compressor housing and the X-pipe (AKA Y-pipe) and the intercooler hoses. I took the truck out on several 0-60 WOT runs. The highest boost was just under 20psi even after I adjusted the TurboMaster Wastegate Control all the way down.

Is 20psi the most that I can get with a stock tune? I could get 18psi with the stock waste gate controller. I relize that the X-wheel will not increase the MAX boost psi.
Mars
Sounds about right for no tunes. Mine (Right now) has just a DIY intake and a 4" exhaust, and I'm seeing about 19PSI @WOT.

With Just the DIY-intake and chip, (no exhaust) I saw up to 26 PSI @WOT.
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post #3 of 12 Old 04-03-2011, 08:08 PM
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yup until you chip it she'll go no higher..i see 28-30 tuned..

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME
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post #4 of 12 Old 04-04-2011, 12:11 AM
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get some tunes!
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post #5 of 12 Old 04-04-2011, 09:50 AM Thread Starter
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Thanks for the replies. I am both please and dismayed that 20psi is the most you can get from a stock tune. Pleased because that means I have no leaks and dismayed because I believed the hype and expected to get 25psi. I plan to get a DP multi-tune as soon as I solve my transmission problems and beef it up. Everything else is in place and ready for a good tune.
Mars


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2001 7.3L, 4R100 auto, CC, DRW, 4X4, X-Wheel, TurboMaster WC, Tymar air filter, Polished X-pipe,CCV-delete, Diesel Site Intercooler and valley boots. Dual Alternators. Gauges, EGT, Boost, Trans temp, Oil temp, Amp meter for each Alt. Mods: A/C heater core shut-off mod, Always Bright Overhead Console, AIH delete, 2WD Low. Stock Tune and Trans.
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post #6 of 12 Old 04-05-2011, 06:17 PM Thread Starter
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I installed a new dark gray with purple o-ring cps today. Afterwards I ran a coupe 0-80 WOT runs. I recorded the runs with my AE software. I glanced at the gauges during the runs and saw that the boost was reading a little over 20psi. When I got home and replayed the run the max boost recorded was 21.42psi just before I let up on the hammer.
Mars


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2001 7.3L, 4R100 auto, CC, DRW, 4X4, X-Wheel, TurboMaster WC, Tymar air filter, Polished X-pipe,CCV-delete, Diesel Site Intercooler and valley boots. Dual Alternators. Gauges, EGT, Boost, Trans temp, Oil temp, Amp meter for each Alt. Mods: A/C heater core shut-off mod, Always Bright Overhead Console, AIH delete, 2WD Low. Stock Tune and Trans.
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post #7 of 12 Old 04-07-2011, 12:57 PM
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Quote:
Originally Posted by mars1952 View Post
I installed a new dark gray with purple o-ring cps today. Afterwards I ran a coupe 0-80 WOT runs. I recorded the runs with my AE software. I glanced at the gauges during the runs and saw that the boost was reading a little over 20psi. When I got home and replayed the run the max boost recorded was 21.42psi just before I let up on the hammer.
Mars
A difference in temp and barometric pressure can change boost numbers 2-3 psi so it may not be the cps.

e99 f250 ccsb, looks stock...
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post #8 of 12 Old 04-07-2011, 02:49 PM Thread Starter
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A difference in temp and barometric pressure can change boost numbers 2-3 psi so it may not be the cps.
I hadn't considered atmospheric pressure or temperature. My mechanical boost gauge is plugged right into the manifold so it couldn't compensate for atmospheric pressure. I don't know it the reading from the PCM compensate for barometric pressure (MAP) but I doubt that they do.
More likely the increase came from the increased speed. On the earlier run I only hit 60mph on this run I hit 80mph. I just wanted to post the numbers so that others could see what a stock (W/X-wheel) turbo could do.
Mars


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2001 7.3L, 4R100 auto, CC, DRW, 4X4, X-Wheel, TurboMaster WC, Tymar air filter, Polished X-pipe,CCV-delete, Diesel Site Intercooler and valley boots. Dual Alternators. Gauges, EGT, Boost, Trans temp, Oil temp, Amp meter for each Alt. Mods: A/C heater core shut-off mod, Always Bright Overhead Console, AIH delete, 2WD Low. Stock Tune and Trans.
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post #9 of 12 Old 04-07-2011, 02:54 PM
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I did a WOT last night, first time I hit 20PSI w/o a chip... but it was uphill w/OD off, lol!
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post #10 of 12 Old 04-07-2011, 04:27 PM
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same theory as well, higher speed and higher load will show more boost. Try revving your motor in park.

e99 f250 ccsb, looks stock...
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