How much turbo boost? - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

 
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post #1 of 10 Old 05-19-2011, 06:39 PM Thread Starter
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How much turbo boost?

Hello All,
i am currently running the H&S 300HD tune w/Blackmaxx on my 2008. I am only getting a max of 41 pounds of boost. Just doesnt seem correct, i have read od peeps getting over 50. Can somebody list the boost they are seeing in the mild, wild, and hot settings? What would cause me to not get the full boost? My defueling is turned off currently and it seems like it is getting a little less boost weekly now. Please help.
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post #2 of 10 Old 05-20-2011, 02:22 AM
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Check your IC boots. If it's getting continually worse they might be leaking.

08 F450 CCLB 4.30's
Spartan, Pure Performance Custom 3", Toyo M608Z, MBRP, FloPro, Banks, Volant, Mishimoto, Dieselsite, LineX, Reese 30k
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post #3 of 10 Old 05-20-2011, 09:17 AM
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Only 41psi?? Honestly that's alot. Does your truck have stock tranny/driveline?

I don't hit 40Psi with a 6" Lift and 35's Running hot tune. But then again, I never give it all it has, My installer told me Ill break something in the driveline If I Full throttle alot right off the start..

Any of this sound right to you guys?

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post #4 of 10 Old 05-20-2011, 09:56 AM
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The only time mine will get above 40 is pulling the fiver and if the truck holds overdrive going over a hill. Unloaded it wont. Never really get after it though without a load. Most throttle I give it is about 3/4's loaded or not.

Troy Simmons
08 F450 4x4
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post #5 of 10 Old 05-23-2011, 05:18 PM
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41 psi!!!! Holly s.... I haul a 50 foot kaufman hauling 21,000lbs and have never hit 40 psi's going up a 15% grade
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post #6 of 10 Old 05-23-2011, 06:32 PM
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Heck, I will hit 45 or better getting on the freeway. That is running the 310 mild
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post #7 of 10 Old 05-23-2011, 06:41 PM
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i hit about 45 doing like 40mph unloaded then steping on it. that was on the 250 race tune

sold..2000 f-350 sc sb/ hualer/dd 2008 f-550 crew cab and 9ft aluninum flat bed. job 1 spartin tunes, legal dpf system.... banks speed brake and full egr delete. new f-250 2008 cc sb 6.4l stock tip side dump and home made dpf delete. home made full egr delete. h&s 300 afe stg 2. air bag/ seat belt de active mod, dry rotted tires, front bumper mia.

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post #8 of 10 Old 05-24-2011, 07:47 AM
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Ill see 45-48 in my spartan 250 tune from a rolling start no problem just like charlie-2

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post #9 of 10 Old 05-25-2011, 09:02 PM
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I will hit 52 to 55 psi almost every time I push it in lockup with the 250 tune and I see 48 to 50 with the 345 tune doing the same thing. I set the alarm to 48 psi on my Sct livewire. So you are far from being in the red zone.

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post #10 of 10 Old 05-26-2011, 06:30 PM
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50+ psi FTW

2016 AG GT350
2013 Fresh150
2008 F350 Lariat Stroker
2005 F250 Lariat Stroker

2004 Mach1 6 spd Black on black
DSS 5.0L stroker
Comp cams w/ FRPP ported heads
twin Turbonetics
13psi 749 hp / 620 ft. lbs. @ 16*
E85 numbers to follow

old Kenne Belle setup at 16 psi
and so on......
600 hp / 585 ft. lbs.
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