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-   -   Boost Pressure at 65mph (https://www.dieselbombers.com/chevy-gmc-duramax-01-04-lb7/27166-boost-pressure-65mph.html)

Red_Rattler 05-28-2009 02:15 PM


Originally Posted by 2500HeavyDuty (Post 342629)
am i like the only dmax with gauges out here :sos:

Yes.... :lol88:

But for fun I'm anywhere from 8-15 depending on conditions while not towing.

Fat Bastard 05-28-2009 07:48 PM

When I'm cruising at 70 mph unload. I see 3-5 psi on my boost gauge.

Whit 05-28-2009 07:53 PM

I dont think it matters what diesel ya drive in the end the boost gauge is basically a work gauge.....................the higher the boost the more fuel or harder the motor is being loaded :humm:


bottom line here is I dont think ya can pin a number on this

Woody35 05-28-2009 08:33 PM

something is wrong because most 6.5s make 1-3 PSI of boost cruisin and we have smaller turbos and a lot lower top boost number. something is wrong with your turbo or something relalated to it

2500HeavyDuty 05-29-2009 12:32 AM

well i got 15mpg this tank... im suspecting a boost leak somewhere gonna have to look

boost looks too low for me, its only been 50 or so days since ive actually looked at them gauges

jpowel29 05-29-2009 09:17 AM

Are you seeing more smoke and higher egts? I would think that would also indicate a leak. I don't get to hung up on boost numbers unless they are dramatically different under the same conditions.

2500HeavyDuty 05-30-2009 12:27 AM

i was gettin almost 100* hotter at times.

i tightened all the clampes down some more and it seemed to help a bit. i really need to get to tuning this booger. never had good injectors with efi live before :D

uwyo_dmax 06-02-2009 09:35 PM

Finnaly got a chance to go out and check for ya mine ran anywhere from 1.6 to 2.2 psi on flatish ground. So either that's normal or we both have somthing wrong

2500HeavyDuty 06-02-2009 11:56 PM

you got your truk back?

Big_Johnson 06-03-2009 04:48 AM

i'll check and see what i'm runnin here in a few minutes. i wanna say it's not much. but idk. I'm about to post a thread cause i'm havin some weird stuff happen with my boost.


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