Thread Tools Display Modes
Old 09-23-2013, 01:00 PM   #1
Join Date: Jun 2012
Location: Cherry Hill, New Jersey
Posts: 115
Year: 1997
Coachwork: Crown by Carpenter
Chassis: Ford B-800
Engine: 5.9L Cummins
Rated Cap: 55
Throttle adjustment?

I was told when I bought my Ford B-800 from the used truck dealer that a school bus usually has a modified system so it can only go up to about 60mph (or the throttle is otherwise limited). Going up a hill, it is SLOW, probably about 20mph at some times. The engine is a Cummins 5.9L.

Is there something perhaps to adjust with the throttle levers? Or something with the injection system? The dealer said something about "plates" that potentially block something. I really don't know much else.

Of course going any faster (speed or acceleration) is maybe a dumb idea when the vehicle fully loaded is around 10-12 tons.
tomas_maly is offline   Reply With Quote
Old 09-23-2013, 02:18 PM   #2
Bus Geek
bansil's Avatar
Join Date: Nov 2011
Location: MNT CITY TN
Posts: 5,158
Re: Throttle adjustment?

Plenty of info about fuel plates etc on the Cummins forums

I don't know where you live, last night coming home I was in 1st gear at 2300 rpms going up the 8%+ grade (6 miles) into Boone this is normal for mine

these are big and heavy with "small" engines

I wont turn mine "up" until I replace the tranny with something stronger (your engine likes 2200/2500 rpms in our applications)
Our build La Tortuga
Accept the challenges so that you can feel the exhilaration of victory.
George S. Patton
bansil is offline   Reply With Quote
Old 09-23-2013, 02:28 PM   #3
Site Team
crazycal's Avatar
Join Date: Feb 2007
Location: NUNYA
Posts: 4,234
Year: 1995
Coachwork: Thomas
Chassis: 3800
Engine: DT408, AT545
Rated Cap: 23 500 gvw
Re: Throttle adjustment?

If you turn up the power, make sure you install a pyrometer.
I'm hungry!

You Gotta Let Me Fly
crazycal is offline   Reply With Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
GMC 351 V6 Throttle spring bansil GM | Chevrolet Drivetrain 0 05-22-2013 05:48 AM
throttle issue smitty500 GM | Chevrolet Drivetrain 3 04-02-2012 06:08 PM
Throttle conversion cschlessman Cummins Drivetrain 1 08-20-2010 02:15 PM
IP Adjustment for Altitude PAtoNM Conversion Tutorials and How-to's 3 08-15-2008 10:52 AM
Governor adjustment reprobate Conversion Tutorials and How-to's 6 12-29-2007 06:56 PM

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:33 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.