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Duramax Second Generation: 2004.5-2005 (LLY) Discuss the second generation (2004.5-2005 LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion belongs in Third Generation forum due to the differences of the 2006 LLY and the 2004.5-2005 LLY. Engine related discussion ONLY.

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Old 01-12-2013, 12:29 AM   #1 (permalink)
KREEP
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At what point do I need a boost gauge?????

I am doing an egr delete and up and down pipes this weekend and a pipe that deletes the egr. I am going to install a EGT sensor and gauge but at what point do I need a boost gauge. I am running the PPE standard and I have 4 or 5 maybe 6 levels of tune. Everytime i put it on level 3 it said I needed a egt sensor. At what point in HP do I need a boost gauge and sensor? This is only a daily driver that I love tinkering with not a race truck.
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Old 01-12-2013, 12:37 AM   #2 (permalink)
Jarhead Red
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Kreep,
I had the same question and from everything I gathered it's "advised" that you run a EGT/ boost gauge after doing performance modifications to your engine as well as running a tune.

I run my PPE at level 2 and have put in both gauges...
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Old 01-12-2013, 01:18 AM   #3 (permalink)
KREEP
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Quote:
Originally Posted by Jarhead Red View Post
Kreep,
I had the same question and from everything I gathered it's "advised" that you run a EGT/ boost gauge after doing performance modifications to your engine as well as running a tune.

I run my PPE at level 2 and have put in both gauges...
Damn I was hoping you would say that i only needed the egt gauge, that stuff is expensive as hell. Have you ever used tune 3 or 4? what is the danger zone for egt's and boost? I was also curious on level 2 which is the same tune I run now, are your egt's staying in a safe zone? Boost as well?
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Old 01-12-2013, 01:19 AM   #4 (permalink)
formulabill
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I have the boost, trans temp, and egt gauges on the a post. The boost guage is very handy to look at when climbing hills and pulling a trailer. I think the most important guage is the egt , temps get close to the red and i start to pull back on the throttle.
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Old 01-12-2013, 01:24 AM   #5 (permalink)
Jarhead Red
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Kreep,
It is expensive but much less than replacing a D-MAX!!!! lol!! I have never ran the tuner above level 2. From everything I have read it is not advised to run at higher levels unless you have rebuilt/replaced and upgraded certain parts of the engine that I have not gotten too yet. As far as EGT from what I have gathered as long as your not running above 1350-1400 for prolonged times (might happen while towing) we should be good.
As far as boost, I have not yet pulled my toy hauler with the gauge on and the highest boost level I have seen while driving on the road has been 23... from what I have read we are good to low 30's with mostly stock engine/Trans.

I REALLY want to know what level's 3-5 feel like in the D-max but I am not willing to risk it right now!! hahahaaaaaaaaazzzzzaaaaa
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Old 01-12-2013, 01:37 AM   #6 (permalink)
KREEP
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Quote:
Originally Posted by Jarhead Red View Post
Kreep,
It is expensive but much less than replacing a D-MAX!!!! lol!! I have never ran the tuner above level 2. From everything I have read it is not advised to run at higher levels unless you have rebuilt/replaced and upgraded certain parts of the engine that I have not gotten too yet. As far as EGT from what I have gathered as long as your not running above 1350-1400 for prolonged times (might happen while towing) we should be good.
As far as boost, I have not yet pulled my toy hauler with the gauge on and the highest boost level I have seen while driving on the road has been 23... from what I have read we are good to low 30's with mostly stock engine/Trans.

I REALLY want to know what level's 3-5 feel like in the D-max but I am not willing to risk it right now!! hahahaaaaaaaaazzzzzaaaaa
I would like to see how it ran on 3 and 4 but just taking it real easy ....that couldnt do any harm. I won't do it unless I have the egt gauge and boost.
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Old 01-12-2013, 12:18 PM   #7 (permalink)
terryk
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Even on a stock truck the boost gauge is a good first-line check of what is happening. No power? Check the boost first.
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Old 01-12-2013, 12:42 PM   #8 (permalink)
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I would be more concerned about stock transmission issues on levels 3 and 4, as level 3 ate mine. Of course a light foot remedies that but that's playing with fire.


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Old 01-12-2013, 02:33 PM   #9 (permalink)
KREEP
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Quote:
Originally Posted by diesel062 View Post
I would be more concerned about stock transmission issues on levels 3 and 4, as level 3 ate mine. Of course a light foot remedies that but that's playing with fire.


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level 3 ate your what? tranny or motor? that sucks were you driving it like you stole it on level 3 when you broke whatever?
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CC LT, LB7 up pipe,pro fab egr delete
4 Inch Rancho lift,LBZ mouth piece
4" straight exhaust,3" down pipe
4300k Hid's heads and fogs
Efi Live tuned by Ga Diesel
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Old 01-12-2013, 03:00 PM   #10 (permalink)
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Monitoring the EGT and the Boost pressure, you can diagnose problems much better. For example, is you have a hole in the boost tube, or loose boot, the pressure will be lower, and you may have a performance problem.
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