Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

Need some help.

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  #21  
Old 12-05-2008, 11:32 PM
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. well it was like 30* outside and i was tired of being cold. plus i had to go to work.
but i'm pissed about my boost gauge cause i couldn't keep my boost increase valve in. so now i'm only runnin like 23psi.
 
  #22  
Old 12-05-2008, 11:36 PM
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go buy about 2 feet of 1/4 rubber hose and you can loop the line around enough to fit the whole thing on there, i was able to fit mine with a straight shot with the tap and boost valve but it was a tight fit.

ill show ya a pic of my FP tap when its sunny out, there was no room to fit the tee in a straight shot so i just got extra hose and did a loop with the hose to get it all in there.
 
  #23  
Old 12-06-2008, 12:21 AM
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okay sounds good. we ended up making a brass tee. it looks pretty good.
 
  #24  
Old 12-06-2008, 12:43 AM
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i might as well snap a pic of my boost and wg mod too while i there, ill post a pic in the monrin
 
  #25  
Old 12-06-2008, 12:54 AM
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alright cool.
 
  #26  
Old 12-06-2008, 02:21 PM
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Heres a pic of my FP tap and my Boost tap.

The boost tap might look a little weird but its just a plugged off tee so its just a ninety.
and u might notice my intake heater is gone too
 
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  #27  
Old 12-06-2008, 08:54 PM
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what is your wastegate line hooked to? this setup looks weird.
but i'm sure you know what you're doin...
 
  #28  
Old 12-06-2008, 11:35 PM
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here is a picture that i took last night of my gauges. i'll take a picture of my tee for the boost gauge tomorrow.
 
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  #29  
Old 12-07-2008, 01:12 AM
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Originally Posted by Big_Johnson
what is your wastegate line hooked to? this setup looks weird.
but i'm sure you know what you're doin...

My wastegate is taking its pressure reading from the actual boost pressure going into the engine, there is like a 2 psi drop going through the intercooler, if you were to tap ur boost gauge after the IC it would read lower.

Im doing some testing right now, since the WG is sensing less boost later the WG will stay closed longer and boost will build up quicker. ive aready seen a 2psi gain over stock with just that mod, and boost will spike quicker too.
 
  #30  
Old 12-07-2008, 01:41 AM
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Originally Posted by 2500HeavyDuty
My wastegate is taking its pressure reading from the actual boost pressure going into the engine, there is like a 2 psi drop going through the intercooler, if you were to tap ur boost gauge after the IC it would read lower.

Im doing some testing right now, since the WG is sensing less boost later the WG will stay closed longer and boost will build up quicker. ive aready seen a 2psi gain over stock with just that mod, and boost will spike quicker too.
well make sure to fill me in on what happens. cause if it's an improvement then i'm definately gonna change mine around. i hit about 26psi on the interstate last night. but i had to retune to the +16o tune cause i don't think my tranny likes my 5th gear when i put it on the +220 tune. it always cuts off my last gear so i can't go over 70mph...
but normally i don't see over 23psi.
 



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