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Old 09-23-2013, 02:00 PM   #1
Skoolie
 
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.
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Old 09-23-2013, 03:18 PM   #2
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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)
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Old 09-23-2013, 03:28 PM   #3
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Re: Throttle adjustment?

If you turn up the power, make sure you install a pyrometer.
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