Boost gauge flutter - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 11-22-2007, 02:12 AM Thread Starter
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Boost gauge flutter

I installed autometer phantom II's. When I had the factory straight piped exhaust on my truck the boost gauge would go up to 27 lbs. and hold steady when I floored it. Now I've installed 4" tb exhaust straight piped and when I floor it goes up to like 30lbs and the needle flutters doesnt stay still its a 60lb gauge.
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post #2 of 20 Old 11-22-2007, 03:45 AM
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Do you have it tapped into the MAP line?

'05 F250, CC, FX4, 6.0 PSD
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post #3 of 20 Old 11-22-2007, 03:51 AM
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I'm assuming your running a stock turbo. I'm thinking that is Compressor Surge. Also, the stock turbo isn't very efficient at boost pressures over 25-27psi.


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Favorite Mods: Baby-seat mod/Girlfriend delete/6pos on Xtreme!

Repairs since bought: both batteries/alternator/3 transmissions/4 clutches/entire front axle/new steering stabilizer/power steering pump

Still broken: cracked windshield/all glowplugs/glowplug relay/4WD still out/trailer harness no power

Current Best: 16.149@84.13MPH (Est.7800lbs)
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post #4 of 20 Old 11-22-2007, 05:23 AM
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x2 on suspecting tapped into MAP line. Mine did that too until I tied it into the intake...

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2008 F350, CCLB, 6.4 PSD (Brad-the wife's truck is black)




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post #5 of 20 Old 11-22-2007, 05:31 AM
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MAP line will give you the flutters. I'm coming right off the intake. The autometer is about 2 seconds behind the stock gauge on reading speed, but they read the same thing and there is no flutter and haven't had a problem yet.
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post #6 of 20 Old 11-22-2007, 05:33 AM
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Mine is in the MAP line and I have never had any flutter...save for surge.

Edit:
YOU KNOW WHAT? I JUST REALISED THIS IS ON A 6.0L. COLOR ME STUPID!!!! LOL


DITTY

Brisco:-White 2000 F-350 PSD CrewCab/SRW/LongBed/4x4/6spd Manual/HUGE Powerstroke.Org Vinals!

Favorite Mods: Baby-seat mod/Girlfriend delete/6pos on Xtreme!

Repairs since bought: both batteries/alternator/3 transmissions/4 clutches/entire front axle/new steering stabilizer/power steering pump

Still broken: cracked windshield/all glowplugs/glowplug relay/4WD still out/trailer harness no power

Current Best: 16.149@84.13MPH (Est.7800lbs)

Last edited by Ditty; 11-22-2007 at 05:34 AM. Reason: I'm dumb
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post #7 of 20 Old 11-22-2007, 05:47 AM
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I actually contacted ISSPRO a few years ago when I first installed mine and they were aware of the flutter problem but the only fix they said was to move it from the MAP like Shawn & Nate mentioned.

'05 F250, CC, FX4, 6.0 PSD
SCT Livewire & Chris at TSD tunes
MTW Stage 1 Turbo
DJ's FUEL+ - Fuel Pressure Intensifier
Nitrous Express NXd Stacker
Snow Performance Stage III Water/Meth Kit
ARP Studs
MBRP 4" Turbo Back w/ no Muffler & no Cat
DashBoss on my iPad
ISSPRO Gauges in Triple A-Pillar
High Idle Mod
Iron Horse Front Bumper Replacement
12,000LB MileMarker Winch
2000Watt Power Inverter
Viper 5901 Remote Start/Alarm
Pioneer Avic-D3 Stereo/Nav
Train Horns!
Valentine 1
Velvet ride shackles
RockStars on 33's
Big azz dent from a blown tire.


"It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived."
- General George S. Patton, Jr

Please support our troops!

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post #8 of 20 Old 11-22-2007, 06:42 AM
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Congrats Ditty. Oh and what color is stupid by the way?
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post #9 of 20 Old 11-22-2007, 03:37 PM Thread Starter
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I put it into the intake elbow as suggested by diesel manor. Is it possible its the wastegate opening up.
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post #10 of 20 Old 11-22-2007, 06:27 PM
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6.0's dont have a wastegate.
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