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Old 03-21-2015, 05:29 PM   #1
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Location: Statesville, North Carolina
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Year: 1993
Chassis: Thomas
Engine: International Navistar DT360
Rated Cap: 60
Where do I find info about my engine specs? Slow bus here.

I bought a bus last week straight off the school bus garage lot. It's a 1993 International Navistar DT466 with 190k miles. Great condition other than the clearcoat (I'm repainting anyway), with new retreads on the back and pretty good tires on the front, and even a full tank of diesel. I'm planning on converting it to run WVO and travel full-time. I'm learning about it and need to know the engine specs but don't know where to look. I have a couple maintenance records I'm going to check through. Through calculations I have a 6. something gear ratio and I can only cruise at around 47mpg with a top speed downhill of 52. I'm going to try to change the governor but I'm not sure if the bus can handle it since I don't know the HP or capabilities. I'd ideally like to cruise at 55 with a top speed of 60-65 (for safety on higher speed roads).

Any idea how to find out the info I need?
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Old 03-21-2015, 06:02 PM   #2
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Year: 1992
Coachwork: Ward/AmTran
Chassis: International
Engine: dt466
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There should be an engine tag somewhere on the block or valve covers.

Welcome to the forum, I like your screen name.
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Old 03-21-2015, 07:31 PM   #3
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There is usually a couple of tags inside the bus that list info like axle ratio and GVWR. I would really be surprised if you had a 6 something ratio with a DT466. That's the biggest International engine they put in a bus. I would bet your ratio is in the fours. You never mentioned rpms. How did you calculate the ratio?
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Old 03-21-2015, 09:30 PM   #4
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Year: 1993
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We took the revolutions per mile of the tire along with the average speed of 48 at 2800rpms and calculated it out.
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Old 03-21-2015, 09:34 PM   #5
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Year: 1993
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Engine: International Navistar DT360
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Thanks! It's actually the name of my blog, too. I just got back at Thanksgiving from a 25,000 mile trip around the country in an antique 1968 Cox Campsquire pop up camper with a friend, three cats, two dogs, and my pet goat. Towed the 900lb. dry-weight camper with my 4 cylinder Honda Element. So I'm pretty used to going slow!

We walked the goat in Union Square (Manhattan), on Bourbon Street in New Orleans, on the monorail in Seattle, on Rodeo Drive in Hollywood, and on the strip in Vegas. Surprisingly there aren't many places that you *can't* take a goat!
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Old 03-21-2015, 11:11 PM   #6
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Quote:
Originally Posted by onenationundergoat View Post
We took the revolutions per mile of the tire along with the average speed of 48 at 2800rpms and calculated it out.
2800 rpms all day long on a trip is pretty high. I think you should find out if you are getting into 4th gear. If you are then maybe you are correct about your ratio. Time for a new bus. I'll be by in a couple of weeks to pick this one up.
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Old 03-21-2015, 11:23 PM   #7
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Year: 1982
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Chassis: International S1800
Engine: DT466 Trans: MT643
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Love it!
You should try and find out what transmission you have--most likely an MT643, but it might be an AT545, which is not quite as awesome. You can tell the two apart from looking at them.
I don't think you'll want to turn up your governor too high for more speed. Cruising at high rpm is gonna burn lots of fuel!
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Old 03-22-2015, 12:25 AM   #8
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I'd be tickled pink to get 55mph, so it's shouldn't be too big of a push from 47. On the drive home from the bus lot we did notice a rough shift between first and second gear (I think). I need to make sure the engine isn't getting choked on fuel. That might have something to do with the lack of power. Gonna check the selenoids and see if that has anything to do with the rough shift. Also the battery gauge indicates that the alternator isn't charging all the time. It'll work some and then drop down, so I'm not sure if it's the gauge itself or the alternator.

What should I look at to determine which transmission I have?

Just realized I wrote 47mpg instead of mph earlier. Ha, I wish!
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Old 03-22-2015, 12:31 AM   #9
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And lots of cowbell, I mean engine.
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Old 03-22-2015, 12:34 AM   #10
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Courtesy of Elliott.

http://www.skoolie.net/forums/f33/ho...pecs-1641.html

If you don't post pics of your bus, it doesn't exist.
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