boost gauge flutter
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Joined: Mar 2006
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boost gauge flutter
i just put a new autometer phantom boost gauge in my 97 and at about 18 lbs it goes haywire and the needle starts fluttering from 15 to 25. called autometer tech suppoort and they say its perfectly normal, sounds like bs to me, it is tapped into the map line. is this normal i had a issipro and glow shift gauge and put those in and they hold steady. thanks
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Joined: Sep 2003
Posts: 2,630
Likes: 217
From: North East Ohio
You need to add a restrictor in the line, like an orfice. I bet that will help, it's helped other brands of boost gauges. The one I installed had one leg of the T almost totally blocked off except for the tiny hole, in the leg going to the gauge. Maybe epoxy that leg shut and drill a small hole and see if it helps.
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'96 7.3 F-350 Reg Cab 4x4 - bought new.
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Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 103
From: Ashland City, TN
Pressure is pressure.
We are not looking for flow, but just a measure of the pressure. So as long as the pressure can transfer, it will go though the hole.
There is no place for the air to go, unless you have a leak, so as long as there is enough of a hole for the pressure to equalize, then it will work.
We are not looking for flow, but just a measure of the pressure. So as long as the pressure can transfer, it will go though the hole.
There is no place for the air to go, unless you have a leak, so as long as there is enough of a hole for the pressure to equalize, then it will work.
Tuned
Joined: Jun 2004
Posts: 275
Likes: 0
From: Alberta, Canada
Guys, this site is so great.... I just installed my gauges last night and was quite discouraged by the fluttering boost needle....today I got a new T, JB welded the end of it and then put a tip cleaning rod thru it for a tiny hole....voila! I'd say 95% improvement.... Goo enough until I put in my banks intercooler and can connect to the port on it.
Thanks for the help!
Thanks for the help!
Tuned
Joined: Sep 2011
Posts: 416
Likes: 0
Mines the opposite! Mine is smooth until like 10 or 15 then its starts to flutter a little bit! Same issue? Does it just need some restriction? The T that came with the boost gauge was TINY as it is tho. The gauge are autometers
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Tuned
Joined: Jun 2004
Posts: 275
Likes: 0
From: Alberta, Canada
The flutter on mine was less at low boost then got worse as boost increased. The hole I put int the T was about 1/64th.
Still flutters a tiny bit around 15 psi.... I still have stock injector and tuning so I can't get above 18 psi yet.....until next week anyway
Still flutters a tiny bit around 15 psi.... I still have stock injector and tuning so I can't get above 18 psi yet.....until next week anyway
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