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Old 01-13-2019, 01:09 AM   #1
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Governor? -2000 Int AmTran

Hi all...just picked up our 2000 Int AmTran and this is the first of what I assure you will be a long list of (potentially) stupid questions.

On the highway on the 500 mile drive home, my new (to me) girl would only do 70 MPH exactly. There was one place where I crested a hill at 70...it was down hill for a couple miles, but she wouldn't do 71. I'm guessing that means there's a governor on her...but I'm so new to this I have no idea where to look or if it's even worth the time given that 70MPH in a skoolie seems to be a pretty good highway speed. Thoughts?
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Old 01-13-2019, 06:30 AM   #2
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Hi all...just picked up our 2000 Int AmTran and this is the first of what I assure you will be a long list of (potentially) stupid questions.

On the highway on the 500 mile drive home, my new (to me) girl would only do 70 MPH exactly. There was one place where I crested a hill at 70...it was down hill for a couple miles, but she wouldn't do 71. I'm guessing that means there's a governor on her...but I'm so new to this I have no idea where to look or if it's even worth the time given that 70MPH in a skoolie seems to be a pretty good highway speed. Thoughts?
Be glad it even goes that fast.
Its electronically limited or limited by gearing.
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Old 01-13-2019, 06:38 AM   #3
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65-70 is really all you want to do in a skoolie... for one the wind resistance will make your drivetrain work hard, plus will really lower your MPG's.. there are various threads here about driving at different speeds.. your MPG's will greatly increase by running 60-65 vs 70-75.



the fact it goes 70 with ease even on hills sounds like you got yourself a nice bus!!



but Yes unless you have run out of RPMs.. (most Navistar engines max at 2600-2700 RPM redline).. then the speed limiter is in the computer and can be turned off with a scan tool. if youy are hitting 70 MPH at the above RPM, then youy are running it as fast as its capable of.



-Christopher
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Old 01-21-2019, 02:21 PM   #4
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Tire Limitations

Remember tires are only rated for 75mph, you go over that and who knows what might happen to them. Kaboom!!!!!!!
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Old 01-21-2019, 02:44 PM   #5
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I'm trying to research the answer to how much faster over the speed rating can a tire safely handle. Some of the guys make it sound like if you exceed your tire rating by 10mph it's going to blow up and kill you. Mine are rated at 75mph and I've run stretches of 300miles at 85 with I'm sure, no detriment to the tires. Most things I have found that need a safety rating are manufacturer with almost a 50% margin to keep liability down. Personally I think a 75mph rated tire will do 100 all day long if they are in good condition.
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Old 01-21-2019, 02:58 PM   #6
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Remember tires are only rated for 75mph, you go over that and who knows what might happen to them. Kaboom!!!!!!!
A good number of the tires made now are rated for 80mph and are good for more mph if inflated properly.
Plenty of school buses can go 80 even 85 in stock school-duty form. Check YouTube.
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Old 01-21-2019, 03:12 PM   #7
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A good number of the tires made now are rated for 80mph and are good for more mph if inflated properly.
Plenty of school buses can go 80 even 85 in stock school-duty form. Check YouTube.
I ran a full tank out (350miles) at 85mph, on cruise control. DT466/3060, 5 sp.
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Old 01-21-2019, 03:40 PM   #8
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That's what I'm talking about! heck yeah!
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Old 01-21-2019, 03:41 PM   #9
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Rear End Ratio

o1marc
Whats your rear end ratio?
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Old 01-21-2019, 03:51 PM   #10
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o1marc
Whats your rear end ratio?
Forget exactly, but it's a mid/low 4. gear.
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