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Old 04-27-2016, 02:25 PM   #31
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when i saw that 110mph number i knew i wasnt doing something right.

makes sense, back off the rpms to max torque and fuel economy, and that be a sweet setup!
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Old 04-27-2016, 03:36 PM   #32
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They're doing better than 110 with those truck/tractor races. I start chickening out at about 60.
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Old 04-27-2016, 07:39 PM   #33
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They're doing better than 110 with those truck/tractor races. I start chickening out at about 60.
ive never seen them hit 110 in the school bus races.. but they ruin a lot of nice busses
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Old 04-27-2016, 08:26 PM   #34
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ive never seen them hit 110 in the school bus races.. but they ruin a lot of nice busses
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Old 04-27-2016, 09:06 PM   #35
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Having been a marine mechanic for over 25 years, I can testify that all manufacturers have proprietary parts and they're all high. On my DT408 the rubber connection from the aftercooler pipe to intake was over $80.00. Worth every penny though. With a split in it the bus wouldn't get out of its own way from bleeding of all its boost. After replacing it, it looked for hills to eat😀!!
Aftermarket support varies and is usually tied more to the truck market (in our case medium duty). If serviced and not allowed to overheat, most won't use their rigs enough to require a rebuild on the engine. Fortunately, the parts we'll most likely need like brakes, tires, filters, etc are easily sourced via aftermarket.
That being said, my International is the first of its kind I've personally owned and can tell you, it was worth the wait. The 408 is a bit of an oddball (a de-stroked 466) but runs like a sewing machine. Coupled with the MT643 it's near bulletproof.
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Old 04-27-2016, 09:15 PM   #36
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Having been a marine mechanic for over 25 years, I can testify that all manufacturers have proprietary parts and they're all high. On my DT408 the rubber connection from the aftercooler pipe to intake was over $80.00. Worth every penny though. With a split in it the bus wouldn't get out of its own way from bleeding of all its boost. After replacing it, it looked for hills to eat😀!!
Aftermarket support varies and is usually tied more to the truck market (in our case medium duty). If serviced and not allowed to overheat, most won't use their rigs enough to require a rebuild on the engine. Fortunately, the parts we'll most likely need like brakes, tires, filters, etc are easily sourced via aftermarket.
That being said, my International is the first of its kind I've personally owned and can tell you, it was worth the wait. The 408 is a bit of an oddball (a de-stroked 466) but runs like a sewing machine. Coupled with the MT643 it's near bulletproof.
for the internationals and the cummins there is quite a bit of aftermarket support as the Diesel-truck guys got in on the action...

AND also dont always try to look up parts for a school bus.. as the older conventional busses like a lot of us are buying are simply a Box truck with a bus instead of a box..

an International S-3800 was the "school bus" chassis version of a 3800 truck.. so finding parts for a 3800 truck such as wheels, tires, transmissions, belts, hoses, fuel injectors, turbo parts, etc will fit the S-3800.. now things like windshield wipers and light bulbs? not so much (unless its for the hood mounted lights).. as those are parts for the Body which were many..

so for those newbies you may think your whole bus is an "international" but you may find that just the chassis was international and the bus body may be Thomas, bliuebird, carpenter, wayne, crown, superior, etc there will be a tag inside the bus above the driver seat that will tell you who made the body on the bus...

-Christopher
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Old 04-28-2016, 05:42 AM   #37
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so for those newbies you may think your whole bus is an "international" but you may find that just the chassis was international and the bus body may be Thomas, bliuebird, carpenter, wayne, crown, superior, etc there will be a tag inside the bus above the driver seat that will tell you who made the body on the bus...

-Christopher
Unless, of course, it *is* an International Bus (Ward, Amtran, IC Bus) But even then, I go by the model number. It's an International 3000RE, and when I talk to the local International bus dealer or questing for parts online, I use that information.
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Old 04-28-2016, 07:21 AM   #38
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Unless, of course, it *is* an International Bus (Ward, Amtran, IC Bus) But even then, I go by the model number. It's an International 3000RE, and when I talk to the local International bus dealer or questing for parts online, I use that information.
true that.. ive always wondered how to figure out what some of the busses are.. ie I saw a wierd looking Blue-bird yesterday.. dog-nose bus but just said blue bird all over it.. kind of a wierd shape.. so id have no idea what the chassis is on it.. it's new enough it was still carrying kids.. but in a few years its someone's future Skoolie..

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Old 04-28-2016, 07:52 AM   #39
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I remember reading somewhere that when IC Bus builds the chassis for another coachmaker, they add that maker's logo instead of the International shield. It's possible it could have been a new 3800-series
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Old 04-30-2016, 09:18 PM   #40
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My general attitude is "if you can't open it, you don't own it."

So, when it comes to bus transmissions and engines, that, to me, means older, non-electronically controlled stuff. I'm no neo-luddite. Computer control has great potential, but practically as it relates to skoolies, Cat and allison are deliberately designed to be hard to work on. They want licensed, certified, lawsuit-weary techs to work on them. The result is two things: these engines and transmissions are slightly more efficient and very slightly cleaner, and are finicky and difficult to shadetree mechanic. Proprietary tools, licensed software, expensive adapters, on and on.

Cummins has a slightly better reputation... that in my experience is not deserved. YMMV. The older internationals I've monkeyed with have been pretty straight forward.

So, the question is kind of a style question: Are you a shadetree mechanic? Are you going to burn vegetable oil? Are you going way "out there"? Or do you never open the engine bay? Want to put it in "D" and go 80 on the highway without another thought?

Personally, I'd love an auto with a lockup torque converter... but the hoops I've seen folks on these boards jump through to get allison to "allow" them to use the two lockup gears on the equipment that they own is ridiculous, and doesn't work for my "way out in it" backwoods diy style. I just don't trust things I can't open if they break. Slow, dirty and old school is how I roll.
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