Power Elbow?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by John Kiernan
Question regarding the boost gauge. I used the power elbow tapped port for my boost gauge. After I did that, my boost needle vibrates from 25 lbs and up when under load. What is the cause of this ?
How many miles on your truck and what mods?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
John Kiernan,
Well as stated previously, it could be a deffective gauge, turbo surging do to sticking vanes or bad acutator. It could also be caused by your A/M air intake or the tunes in the SCT.
Whose tunes are you running in your SCT?
Well as stated previously, it could be a deffective gauge, turbo surging do to sticking vanes or bad acutator. It could also be caused by your A/M air intake or the tunes in the SCT.
Whose tunes are you running in your SCT?
Posting Guru
Joined: Jan 2007
Posts: 2,364
Likes: 3
From: Gilbert Az.
i am refering to dynamics of pressure in a closed system, reading with a simple mechanical gauge of course you will see fluctiations thats what i'm saying, what you wont see (without a rapid 120 to 240 hz transducer) is a accurate representation of true system pressure at any given moment, & given the inconvience of strapping a multi chanel oscilliscope onto the dash a mechanical gauge is good enough as a average system pressure is all we need to see, therefore point of sample is irrelevant & the map sensor hose is exactly as accurate as the elbow,as is the compressor outlet. Does this make more sense or am I just forgetting my theoretical physics (it has been 21 years) that is possible!
Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
Originally Posted by larry schultz
dose anybody have a phone# for intake elbows thanks
aaron@intakeelbows.com
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Brett Foote
Junior User
Joined: Apr 2007
Posts: 59
Likes: 0
Originally Posted by hotroddsl
i am refering to dynamics of pressure in a closed system, reading with a simple mechanical gauge of course you will see fluctiations thats what i'm saying, what you wont see (without a rapid 120 to 240 hz transducer) is a accurate representation of true system pressure at any given moment, & given the inconvience of strapping a multi chanel oscilliscope onto the dash a mechanical gauge is good enough as a average system pressure is all we need to see, therefore point of sample is irrelevant & the map sensor hose is exactly as accurate as the elbow,as is the compressor outlet. Does this make more sense or am I just forgetting my theoretical physics (it has been 21 years) that is possible!
I have a theory as to what causes the needle flutter when tapped into the MAP line. My theory is that since line deadheads at the MAP sensor and the line carries less volume each time the intake valves open the drop in pressure is registered. I left the T in the MAP line and when I switched to the Isspro gauges I tried the MAP line first and then went back to the elbow as it had the same fluttering needle issue the Western Diesel gauge had.
Last edited by OregonF350; Jul 5, 2007 at 06:45 PM.
Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
Originally Posted by mrxlh
Guys it is pulsation, install a pulsation dampner or a needle valve and it will go away.
Hey, where do folks pick up those items? Pulsation_dampeners-N-needle-valves-R-US? No, really, I'm without resource. Thanks!
Brian
Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
Originally Posted by hotroddsl
mc master carr supply or ww grainger industrial supply are 2 that come to mind.