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Cummins 855 boost pressure
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JD 9660
Posted 2/4/2025 11:24 (#11088774 - in reply to #11088687)
Subject: RE: Cummins 855 boost pressure


Southern PA
thefarmers - 2/4/2025 10:33

I’d think it ought to run more than 12psi boost.


At 350 hp, I totally agree!

To the OP, you need to verify the turbo boost with a manual guage before you dig too deep. Definitely check for intercooler boost leaks, check all boots/clamps, etc.


ETA.


IMO, 12 lbs is enough boost to clean up the exhaust, but not enough to keep your egt's in check. (If 12 lbs is accurate) Your boost should be twice that, IMO.



Edited by JD 9660 2/4/2025 11:28
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