Stock boost? - Chevy and GMC Duramax Diesel Forum

11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 16 (permalink) Old 11-15-2012, 11:22 AM Thread Starter
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Stock boost?

Tried searching. Can't find info on LML. What's the stock boost. With NP tune on my H&S I'm seeing 29PSI max. Is this the norm?


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post #2 of 16 (permalink) Old 11-17-2012, 07:55 AM
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post #3 of 16 (permalink) Old 11-17-2012, 10:20 PM
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29psi is the max boost that the H&S will read, you may get higher boost with a hot tune, and need an aftermarket boost gauge to see true boost.

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post #4 of 16 (permalink) Old 11-18-2012, 07:23 AM
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Ive seen 30 with my lbz

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post #5 of 16 (permalink) Old 11-18-2012, 10:12 AM
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I hve seen 34psi on my mini maxx. That's running on hot

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post #6 of 16 (permalink) Old 11-19-2012, 12:54 AM
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Originally Posted by DENALI HD3500 View Post
29psi is the max boost that the H&S will read, you may get higher boost with a hot tune, and need an aftermarket boost gauge to see true boost.
I've seen mine go up to 33 on hot with my minimax.

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post #7 of 16 (permalink) Old 11-20-2012, 09:44 AM
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Mine is stock w/AutoMeter boost and pyro. I have seen mine hit 30lbs. a couple times.

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post #8 of 16 (permalink) Old 08-19-2014, 10:45 AM
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very very old thread but....
i got a 2015 lml and a very poor fuel economy for the 2nd parts of my trip plus a humming soung Under the Hood like a exhaust sound
my obdii reader only tells me i have 12.5psi at full thottle with my 9000lbs trailer
what are the lml stock boost number please
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post #9 of 16 (permalink) Old 08-19-2014, 10:50 AM
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i think stock boost is in the 24-25 psi area
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post #10 of 16 (permalink) Old 08-19-2014, 12:16 PM
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Originally Posted by Djreversal View Post
i think stock boost is in the 24-25 psi area

That is what I usually see with the Edge CTS - max when pulling a fifth wheel.

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