Bouncing Boost Gauge

[AFBLUE]

First I should start of by saying hello and great forum, seeing as I am a new guy. I have been around Turbo vehicles for years now, everything from turbocharged snowmobiles, to cars (Subaru WRX). But now have made my way into the diesel community. The lack of a throttle body like gassers still baffles me a little?

SO HERE IS MY QUESTION: 1995 F250 7.3, I just installed a standard Autometer mechanical boost gauge on the steering collum. WOT I hit stock target boost of around 19psi I think, but the needle is bouncing or twitching +and- about a psi I can barely read it!!! My line is tapped into the MAP sensor line that runs from the right manifold to the MAP mounted in the firewall. Is there a more stable boost source to view?
I have searched but havent found an answer in old posts, but I am sure someone has adressed this before and how to correct it, becuase its rather anoying!!

[cowboymafia]

thats where yer suppose to put it... by the way welcome to the org and im not sure why its doing that but some one will be along here shortly im sure too help ya out..

[Raul@Stealth Automotive]

sounds like turbo surge to me...... mine does that at WOT all the time... only real cure is a new housing or a whole new turbo

[AFBLUE]

Yes the bouncing does get worse the higher the boost, the needle is fairly steady when running a steady RPM. I didnt know if it had something to do with the manifold design, and the cylinders gulping large amounts of air was creating the fluctuation.

[Got Diesel?]

Mine does the same thing

[fordnut85]

It's normal, as long as it's only 1psi either way you really don't have anything to worry about.

[JoeyCleland]

typical turbo surge, all 7.3's do it, especially with a chip

[squeeks]

mine does it too, is there a way to get rid of the bounce? Someone mentioned something about a new housing?

[JoeyCleland]

well you can:

1. Get an ats housing for your turbo - fun
2. Get a new turbo - funnerer

[squeeks]

whats the difference between the ats housing and the stock one?