50psi on H&S - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 07-27-2010, 12:29 PM Thread Starter
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50psi on H&S

Has anyone seen boost numbers that high? The most I usually ever hit is 47 and then I saw 50 one day. Coincidentally that day I could smell burning transmission fluid.

2010 F250 Harley Davidson Edition-

H&S BlackMaxx, Flo-Pro 5" Downpipe back exhaust to a 6" MBRP tip, AFe stage 2 Si Intake
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post #2 of 7 Old 07-28-2010, 11:35 AM
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I have my defuel setting at 40 psi, and yes I have seen it go over 40 and defuel a few times.

2010 Ford F250 CC 4X4 6.4 with H&S Mini Maxx/DPF Delete, Moto Metal 959s, 35X12.50-20 Nitto Trail Grapplers, Fold-A-Cover
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post #3 of 7 Old 07-28-2010, 01:44 PM Thread Starter
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I know like mid 40s is normal but to hit 50 and smell burning transmission fluid struck me as odd.

2010 F250 Harley Davidson Edition-

H&S BlackMaxx, Flo-Pro 5" Downpipe back exhaust to a 6" MBRP tip, AFe stage 2 Si Intake
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post #4 of 7 Old 07-29-2010, 03:31 PM
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Originally Posted by Whatcop? View Post
I know like mid 40s is normal but to hit 50 and smell burning transmission fluid struck me as odd.
I have seen as high as 65 psi with my Spartan on the 310. The problem comes when you let off the throttle, all that pressure has nowhere to go. I've seen some extreme cases where there is enough back pressure to hold the intake valves open. The intake valve meets the piston at TDC and breaks the piston.

Glen

'08 F350, cc, lb, ARB front bumper, Warn 12,000 lb. Spartan tuner, KEM 310 tune , Flow Pro 4", Weatherguard toolbox, 6" PIAA spots, leveling kit.
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post #5 of 7 Old 07-29-2010, 05:35 PM
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Originally Posted by 2008PSDnewbie View Post
I have seen as high as 65 psi with my Spartan on the 310. The problem comes when you let off the throttle, all that pressure has nowhere to go. I've seen some extreme cases where there is enough back pressure to hold the intake valves open. The intake valve meets the piston at TDC and breaks the piston.
not good, wish these trucks came with a wastegate and BOV

09 F-250 Superduty CCSB
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post #6 of 7 Old 07-29-2010, 05:51 PM
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DDAANNGG this rig can make some PSI huh?

2010 F350 Lariat 6.4, XLT, FX4

Current upgrades: International emblems, tinted windows, Husky toolbox, window vents, Rhino lined bed

Future upgrades: Cab clearance lights, leveling kit w/ 35's, AFE intake, H&S 5" exhaust, H&S Black Maxx

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post #7 of 7 Old 07-29-2010, 07:07 PM Thread Starter
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Whats funny is in the beginning it only made 42 then 45 then 47 and recently it hit 50

2010 F250 Harley Davidson Edition-

H&S BlackMaxx, Flo-Pro 5" Downpipe back exhaust to a 6" MBRP tip, AFe stage 2 Si Intake
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