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Topic: Boost Numbers (Read 569 times) previous topic - next topic

Boost Numbers

I installed a boost gauge awhile back on my 8.3 mechanical and I'm wondering how my boost number compares to others. I was thinking that you VMS guys will all have this info. I know B&C are getting up to 30. I am seeing a max of 25.5. Performance off the line and pulling hills is good. Just curious. Thanks.
jor
93 225
95 300
97 270
99 320

Re: Boost Numbers

Reply #1 –
Sounds correct.

But, for specific information for your engine, call Cummins with your engine serial number.

The can tell you max boost for YOUR engine.

Cummins 800-286-6467 
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Boost Numbers

Reply #2 –
Quote from: jor –
I installed a boost gauge awhile back on my 8.3 mechanical and I'm wondering how my boost number compares to others. I was thinking that you VMS guys will all have this info. I know B&C are getting up to 30. I am seeing a max of 25.5. Performance off the line and pulling hills is good. Just curious. Thanks.
Do you have a pyrometer, as well, John? I sure miss those on this coach, tho I'm told, as long as the engine has not been 'hot rodded', there is no need. I sure liked them, though.
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Boost Numbers

Reply #4 –
Max boost will depend on altitude, temperature and whether the turbo has a waste gate or not.

Pyrometer is good as high density altitude, high temperature and especially mechanical engines can see high EGTs at lower RPM. One of the good reasons to keep revs up when climbing grades.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)
 

Re: Boost Numbers

Reply #5 –
99 ISC, I'll see 28.5 on the VMspec at 1750-2000 RPM on a hard pull.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country