Boost Gauge Flutter?

Tail_Gunner

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Now that my D66 turbo is installed, I'm noticing a very pronounced amount of flutter of the boost gauge.

With the old turbo, the most boost I ever saw was in the 24-26 psi range with maybe a + 2 psi gauge flutter.

Now with the D66 installed, in a medium level chip setting, I'm seeing about 30 psi of boost, but now the flutter is more pronounced at +4 psi.

Does anybody know what causes the gauge flutter? Is it an indication of compressor stall, intake restriction, greater turbo output or ???
 

hheynow

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IIRC there is a snubber available to smooth out the boost flutter. I thought ITPDiesel sold them but couldn't find them on their site.
 

BIG JOE

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Now that my D66 turbo is installed, I'm noticing a very pronounced amount of flutter of the boost gauge.

With the old turbo, the most boost I ever saw was in the 24-26 psi range with maybe a + 2 psi gauge flutter.

Now with the D66 installed, in a medium level chip setting, I'm seeing about 30 psi of boost, but now the flutter is more pronounced at +4 psi.

Does anybody know what causes the gauge flutter? Is it an indication of compressor stall, intake restriction, greater turbo output or ???

Sometimes, it can be a leak at a fitting. Does'nt leak until higher pressures are built. Sputters = Flutter.

Sometimes, when you've disconnected things.. as you put them back together, an un-seen kink gets created.

:dunno
 

bushpilot

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ditch the T'd mount (rubber line) position...drill, tap
and MOUNT @ the boost elbow and youll get
good STEADY ACCURATE readings.
 

JRJ04

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easier said than done bush. if i understand it correctly, on the 6.0, the intake manifold is fairly easy to remove (4 bolts) and then drill, remove the shavings, and tap. on the 7.3, its connected to the Y pipe and the easiest way to drill and tap that is to take off the intercooler tube to get the shavings out. Taking the tube off is not a problem, but getting that good seal again could be another issue.

I only say this because after just installing my gauges, there was no way I wanted to mess with pulling the IC tube off. I'm tapped into the map sensor line with a T and so long as I keep my foot steady (ie not a bumpy road), I see a constant reading when I really get on it. It will get up to about 20psi and then slowly move back down as I back out of it.

Sounds to me like Kent has drilled and tapped. Am i wrong?
 
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paulkeith

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removing and reinstalling the IC tubes with a good seal is extremely simple and nothing to worry about. However, your simplest solution is to put a boost fitting into a the plug you use for your AIH delete. Drilling is done away from the motor so shavings and cleaning are of no concern. Simple, clean, two birds with one stone.

pic of mine:
IMG_1926.jpg

IMG_1927.jpg



I dont know if changing the reading location will fix your gauge flutter though. Are you sure you're not getting actual surge or flutter in the turbo? I would hope not.

Later,
Paul
 
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Tail_Gunner

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ditch the T'd mount (rubber line) position...drill, tap
and MOUNT @ the boost elbow and youll get
good STEADY ACCURATE readings.

It's already drilled and tapped into the "Y" manifold with a pipe thread/compression fitting.
 

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