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Old 09-30-2012, 03:17 PM   #11
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Re: yet more 7.3 idi questions

Opus- yes i am sorry i did miss your point. And it was quite valid. It could have been read one of two ways, i read it wrong. Thanks
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Old 09-30-2012, 03:34 PM   #12
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Re: yet more 7.3 idi questions

Ha, no problem. The joy of communicating like this.
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Old 09-30-2012, 07:49 PM   #13
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Re: yet more 7.3 idi questions

i have owned several buses, and i would be scared to have a 7.3 liter in a full size skoolie.

I agree with the above poster that the cummins 5.9 is a much better choice.

The difference in price between a bus with an underpowered engine or a bus with what many consider a great engine is negligible. It's all about finding a bus when you want one.

I prefer to contact many school districts and ask when they are planning to auction off the buses. Direct from the school district is the best way to get a bus in my opinion. They tend to do excellent maintenance.
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Old 10-01-2012, 03:25 PM   #14
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Re: yet more 7.3 idi questions

While my build isn't finished yet, I have had T444E out on some decent hills. I've got a spicer 5-speed manual with a 1-1 top gear transmission and a 5.82 rear, and I can get the bus up to 65 at about 2700RPM. I can also climb most of the steep hills here in fifth gear without dropping below 45 mph.

The 45 mph mark is important, because it would mean shifting down to fourth. SO even with really low gearing you can still make hills. Granted, with a bigger engine, I'm sure I'd be pulling hills at 50, but it's what came with the bus and it runs fine ...

ETA: Oh, and it looks like I'm getting 10-12 mpg with that ...
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Old 10-01-2012, 05:30 PM   #15
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Re: yet more 7.3 idi questions

Quote:
Originally Posted by Hex
While my build isn't finished yet, I have had T444E out on some decent hills. I've got a spicer 5-speed manual with a 1-1 top gear transmission and a 5.82 rear, and I can get the bus up to 65 at about 2700RPM. I can also climb most of the steep hills here in fifth gear without dropping below 45 mph.

The 45 mph mark is important, because it would mean shifting down to fourth. SO even with really low gearing you can still make hills. Granted, with a bigger engine, I'm sure I'd be pulling hills at 50, but it's what came with the bus and it runs fine ...

ETA: Oh, and it looks like I'm getting 10-12 mpg with that ...
Even though the 444e is the same displacement as the 7.3 IDI, it's a different animal.
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Old 10-01-2012, 06:00 PM   #16
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Re: yet more 7.3 idi questions

Yep if it had a dt444e it would be in my driveway now. idi is non turbo mechanical injection. dt444e is turbo and electronic controlled. huge difference especially in torque.
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Old 10-01-2012, 06:03 PM   #17
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Re: yet more 7.3 idi questions

Huge difference in repair costs too. ;)
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Old 10-01-2012, 10:19 PM   #18
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Re: yet more 7.3 idi questions

Injectors for the 444e run about $250 each.
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Old 10-02-2012, 11:31 AM   #19
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Re: yet more 7.3 idi questions

Ahh, fair enough. I know just enough about the engines to be dangerous.
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