Boost question
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From: Circle Pines
Boost question
I am only showing 2lbs of turbo boost at 65 on the highway with the cruise on. Is that normal or low. I thought I read somewhere on here you should get 6-7 lbs of boost at highway speed. Thanks Tom
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From: Middleton, Idaho
That does sound a bit low. I see you have the over boost eliminator, after I had put mine in I didn't get the connections tight enough and it was not reading properly. So if evewrything else is tight you may want to check it out.
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From: Millbrook Alabama
Originally Posted by mndiesel
I am only showing 2lbs of turbo boost at 65 on the highway with the cruise on. Is that normal or low. I thought I read somewhere on here you should get 6-7 lbs of boost at highway speed. Thanks Tom
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From: Circle Pines
Originally Posted by bdrummonds
Tom, How many miles on the truck. I too am going through a low boost prob right now and I have narrowed mine down to the waste gate actuator. My actuator rod is tight, but I think the spring inside the actuator housing has become weak and is letting my exhaust push open my WG a little thus creating a lower overall boost. I am seeing 3-5 psi at 70mph and can only acheive 18-20 at WOT thru the gears. And if I unplug the red line to the actuator it makes no difference in the above WOT number.
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From: Circle Pines
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Joined: Jun 2007
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From: Hampton, Maryland.
I am seeing only 4-6 lbs at 60-65mph. At WOT I have only seen 16lbs although I haven't really got on it on the highway. I will today and see what happens.
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Joined: Feb 2007
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From: Blairsville,Ga
Originally Posted by bdrummonds
My actuator rod is tight, but I think the spring inside the actuator housing has become weak and is letting my exhaust push open my WG a little thus creating a lower overall boost. .
I took up a little more on the new one,not sure if it will help
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From: Dallas-Ft. Worth
I don't think that's low for stock. I wish I could go out and test it, but my wife won't quit driving it!!! 
This is getting bad. She's got a relatively new (2006) Mitsubishi Durocross, too. Anyone want to trade a low mileage (10k) Durocross for something with a 7.3??
This is getting bad. She's got a relatively new (2006) Mitsubishi Durocross, too. Anyone want to trade a low mileage (10k) Durocross for something with a 7.3??
Last edited by Izzy351; Jul 5, 2007 at 01:49 PM.
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From: Cincinnati, Ohio
IMO the way the gauge is connected and the manufacturer of the gauge will cause some variance in readings. At maintenance throttle at 70MPH I see about 4 or 5#'s boost while in DP-Tuner setting 80economy, but as soon as the truck starts climbing a grade I see as much as 14#'s. Now if I'm passing some Duramax or Cummins I have seen 26#'s.