Reply
 
Thread Tools Display Modes
 
Old 08-25-2018, 08:29 PM   #1
Mini-Skoolie
 
Join Date: Jun 2018
Location: Iowa
Posts: 28
Year: 1998
Chassis: Bluebird
Engine: Cummins 5.9L inline-6H
5.9 temp and oil psi

Took the bus cross country and was getting 55mph at 1700 with oil and temp sitting dead center. After a ton of reading got the tst power kit and replaced the fuel plate under the afc hoping to gain a few mph.

After install doing 60mph at 1700 however oil pressure running little over 65 (probably ok), and temp creeping past 210 which is a bit of a increase.

Anyone familiar with this and have a suggestion other then putting stock plate back in, woukd really like to cruise a bit faster but not up for damaging the bus. Seems I read a dozen places where people did this without issue.
Hazin is offline   Reply With Quote
Old 08-25-2018, 08:48 PM   #2
Bus Nut
 
Join Date: Jul 2017
Posts: 365
Year: 1993
Coachwork: Goshen
Chassis: E350
Engine: 7.3 IDI
Rated Cap: 14
Quote:
Originally Posted by Hazin View Post
Took the bus cross country and was getting 55mph at 1700 with oil and temp sitting dead center. After a ton of reading got the tst power kit and replaced the fuel plate under the afc hoping to gain a few mph.

After install doing 60mph at 1700 however oil pressure running little over 65 (probably ok), and temp creeping past 210 which is a bit of a increase.

Anyone familiar with this and have a suggestion other then putting stock plate back in, woukd really like to cruise a bit faster but not up for damaging the bus. Seems I read a dozen places where people did this without issue.

Have a pyrometer? I'm curious what EGTs are running. What was your typical temperature before the mods?


Oil pressure is fine... and honestly, 210F isn't anything to worry about... but if it was a substantial jump in what it used to run, I'd look into it. More then likely, EGTs are a good bit higher. Need to know what exhaust temp is running.
Mr4btTahoe is offline   Reply With Quote
Old 08-25-2018, 09:03 PM   #3
Bus Geek
 
o1marc's Avatar
 
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 7,187
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
180-190 is normal operating temps, 210 is not critical and I wouldn't worry about damaging anything unless it was sustained at better than 230. Even my bus will see 230 temps on hills if you stay in it.
o1marc is offline   Reply With Quote
Old 08-25-2018, 10:14 PM   #4
Mini-Skoolie
 
Join Date: Jun 2018
Location: Iowa
Posts: 28
Year: 1998
Chassis: Bluebird
Engine: Cummins 5.9L inline-6H
50 and 180 seemed to be the normal on a 12 hour trip before. On a 30 minute trip now is 65 and 210.

I'll have to look into the other
Hazin is offline   Reply With Quote
Old 08-25-2018, 10:31 PM   #5
Bus Nut
 
Join Date: May 2018
Location: topeka kansas
Posts: 570
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
odd numbers

so the water temp gauge is showing higher temperatures and the oil pressure is higher too.

I would expect with a higher water temp, and the same engine rpm, the oil pressure would be lower.
magnakansas is offline   Reply With Quote
Old 08-26-2018, 08:43 AM   #6
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,656
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
check your grounding for the gauges.. if the ground is bad, its possible that the oil PSI gauge is obtaining its reading with grounding through the temp sensor ..



I didnt see what transmission this has.. but if its an AT545 then the engine might run higher RPM against the converter stall thus creating a higher oil PSI.. (and a HOT transmission!).
-Christopher
cadillackid is offline   Reply With Quote
Old 08-26-2018, 11:37 AM   #7
Bus Nut
 
Join Date: Nov 2017
Location: Wright City MO
Posts: 257
Year: 1998
Coachwork: Bluebird
Chassis: Bluebird
Engine: 5.9 Cummins/Allison
Rated Cap: 74
It seems to me that 1700 rpm is substantially under red line and if so should not be causing a temp problem.My 5.9 runs a 2200 rpm all day long and even with a AT545 does not build engine heat and to avoid trans temp problems I built and installed a MONSTER trans cooler.
__________________
Its hard to be wrong when you live in Wright City!
There is no mechanical problem that cannot be overcome by a skillfully applied combination of brute force and ignorance!
Gdog 5651 is offline   Reply With Quote
Old 08-26-2018, 11:42 AM   #8
Bus Nut
 
Join Date: Nov 2017
Location: Wright City MO
Posts: 257
Year: 1998
Coachwork: Bluebird
Chassis: Bluebird
Engine: 5.9 Cummins/Allison
Rated Cap: 74
And after installing the pump plate it is likely over fueling somewhat causing higher EGT after modifying fuel system a pyrometer is always a good idea if not near mandatory.
__________________
Its hard to be wrong when you live in Wright City!
There is no mechanical problem that cannot be overcome by a skillfully applied combination of brute force and ignorance!
Gdog 5651 is offline   Reply With Quote
Old 10-29-2018, 12:29 AM   #9
Mini-Skoolie
 
Join Date: Oct 2015
Location: BC Rockies
Posts: 45
Year: 93
Coachwork: Corbiel
Chassis: Ford
Engine: 5.9 Cummins
Rated Cap: 36 pass
Hi GD, I have a 36 pas 93 ford with 5.9 and 545. Seems I'm runin around 2200 rpm at 60, when I tie into a hill the rpm goes up and the speedo goes down. I'm told this is normal for the 545, I'm thinkin with your bigger bus this must be a bigger issue. What are your thoughts on improving fuel mileage?
Free Bird is offline   Reply With Quote
Old 10-29-2018, 06:56 AM   #10
Bus Nut
 
Ronnie's Avatar
 
Join Date: Oct 2017
Location: Virginia
Posts: 947
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
Anytime you change from the factory fuel setting you really must have an exhaust temp gauge. High egt's make for melted pistons.

1700 rpm's seems over geared for it. 2200-2300 is a nice cruising rpm for the 5.9. Do you know what your gear ratios are? and do you know what speed 2200rpm's would be if you had the power to get there?
Ronnie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:40 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.