5.9 Common Rail Boost levels change
This is a discussion on Boost levels change within the 5.9 Common Rail forums, part of the Dodge Ram Cummins Diesel Forum category!
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Help me out...
When I'm driving on the interstate (truck is already warm ...
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02-06-2012, 02:12 AM
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#1 (permalink)
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Supporting Member
Join Date: Jul 2011
Location: Indiana
Name: Braydon
Age: 23
Posts: 1,407
Ram Year: 2005
Engine: Cummins
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Boost levels change
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Help me out...
When I'm driving on the interstate (truck is already warm and at operating temps) my boost will be setting at around 10 psi (flat ground) and my egts will be hovering around the 700* mark...well about 30-45 minutes into the trip, my boost will drop to about 6 psi and my egts right around the 600* mark?
Why is this happening? Were I drove to has an elevation change of only 100 ft or so. Would that cause it?
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2005 4x4 CTD-5" Turbo back exhaust, Icebox CAI, Smarty SW7, AirDog, built tranny, leveled, Linex Rockers, 08.5 steering upgrade, custom grill, 5" RC lift, 35s, Sidebiter wheels...more to come
I think the only truck on RF that doesn't have something plasti-dipped
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02-06-2012, 08:42 AM
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#2 (permalink)
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Administrator / Owner
Join Date: Jun 2010
Location: Central Illinois
Name: Dave
Age: 32
Posts: 18,840
Ram Year: 1994
Engine: 7.5L
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That sounds about right to me .. Higher boost higher EGT
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02-06-2012, 06:14 PM
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#3 (permalink)
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Supporting Member
Join Date: Jul 2011
Location: Indiana
Name: Braydon
Age: 23
Posts: 1,407
Ram Year: 2005
Engine: Cummins
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Yea thats normal... but why would I randomly have a lower boost on the same stretch of highway (flat highway) at the same speed?
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__________________
2005 4x4 CTD-5" Turbo back exhaust, Icebox CAI, Smarty SW7, AirDog, built tranny, leveled, Linex Rockers, 08.5 steering upgrade, custom grill, 5" RC lift, 35s, Sidebiter wheels...more to come
I think the only truck on RF that doesn't have something plasti-dipped
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02-06-2012, 06:33 PM
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#4 (permalink)
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Administrator / Owner
Join Date: Jun 2010
Location: Central Illinois
Name: Dave
Age: 32
Posts: 18,840
Ram Year: 1994
Engine: 7.5L
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No idea
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__________________
RamForum.com Administrator/Owner/Vendor
Click the link for info
DB Truck Customs Facebook Page (Click Here)
dbtruckcustoms@gmail.com FOR ALL YOUR PARTS NEEDS or installs email/PM me for a price quote. If you want it chances are I can get it at a very good price ! Web Sight Coming Soon !!
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02-06-2012, 09:55 PM
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#5 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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I typically see about 2-3 PSI boost at about 500-550*F at 55 MPH.
But my boost pressure will wonder up and down depending of load and grade...
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Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List |
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02-06-2012, 10:16 PM
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#6 (permalink)
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Supporting Member
Join Date: Jul 2011
Location: Indiana
Name: Braydon
Age: 23
Posts: 1,407
Ram Year: 2005
Engine: Cummins
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Thanks... its just weird that they will be 1 level at one poit, then another level at another point under the same cercumstance (mph, grade)
I dunno... I was just wondering
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__________________
2005 4x4 CTD-5" Turbo back exhaust, Icebox CAI, Smarty SW7, AirDog, built tranny, leveled, Linex Rockers, 08.5 steering upgrade, custom grill, 5" RC lift, 35s, Sidebiter wheels...more to come
I think the only truck on RF that doesn't have something plasti-dipped
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02-12-2012, 01:20 PM
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#7 (permalink)
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Senior Member
Join Date: May 2011
Age: 51
Posts: 102
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Remember that boost pressures and EGT's are also related to air density and weather changes.
Simple changes to humidity can and will make changes like this also.
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02-12-2012, 03:47 PM
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#8 (permalink)
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Supporting Member
Join Date: Jul 2011
Location: Indiana
Name: Braydon
Age: 23
Posts: 1,407
Ram Year: 2005
Engine: Cummins
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Makes sense...thanks man
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__________________
2005 4x4 CTD-5" Turbo back exhaust, Icebox CAI, Smarty SW7, AirDog, built tranny, leveled, Linex Rockers, 08.5 steering upgrade, custom grill, 5" RC lift, 35s, Sidebiter wheels...more to come
I think the only truck on RF that doesn't have something plasti-dipped
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02-12-2012, 04:48 PM
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#9 (permalink)
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Senior Member
Join Date: Oct 2011
Location: Pittsburgh/State College
Name: Cody
Age: 21
Posts: 2,722
Ram Year: 2005
Engine: 5.9 Cummins
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Hm never really put that together lol
Pgage=Psystem-Patmosphere
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02-12-2012, 07:59 PM
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#10 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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Or just get a PSIa Gauge... (Pound per Square Inch Atomsphere)... So 14.7 PSI is normal atomsphere and 0 PSIa would be 30" inches of vacuum...
Just another way to look at it...
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__________________
Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List |
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