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Old 08-11-2016, 06:28 PM   #1
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Dt466 rpm

I've been scouring this site, and Google, and have been getting a lot of conflicting info.

What is the preferred cruising RPM for this engine? (Mechanical)

Mine does 2600 rpm (governed rpm) at 65 MPH. I feel like this is pushing the engine. But the previous owner only drove with the pedal to the floor and maintained 12mpg on flats. I read on other sites that a lot of over the road trucks are spinning 2400-2700 RPM at highway speeds, so I'm not terribly worried. But wanted to hear input.

I'm tossing around the idea of re gearing. But I really don't have a problem going 60-65
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Old 08-11-2016, 06:33 PM   #2
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I've not been on long trips yet. But 60 is comfortable to me, on the roads I've traveled... Spinning about 2250-2300 rpm

If I bump it up to 65, it feels like I'm pushing engine too hard at about 2500-2600 rpm.
Still having trouble holding pedal to metal... I'm just not acclimated to the bus size yet. And I'm still learning my machine
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Old 08-11-2016, 06:36 PM   #3
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We must have the same rear end, from what I've gathered I think it's a 4.44. Even though I originally thought it was 4.78. I'm comfortable at those speeds, and have no problem going pedal to the metal, but it sure sounds like the engine hates it. Maybe I'm just not used to diesel "sound"
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Old 08-11-2016, 06:40 PM   #4
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Originally Posted by bread519 View Post
We must have the same rear end, from what I've gathered I think it's a 4.44. Even though I originally thought it was 4.78. I'm comfortable at those speeds, and have no problem going pedal to the metal, but it sure sounds like the engine hates it. Maybe I'm just not used to diesel "sound"
I have yet to confirm my ratio... I'm just basing my observations on the roads I've traveled. No interstate highways yet.
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Old 08-11-2016, 06:43 PM   #5
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I had a 19 hour drive home so I've gotten a pretty good handle on how she runs on the highway
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Old 08-11-2016, 06:50 PM   #6
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Our DT360 is rated at 2700rpm on the engine block label. With 4.7 gears we make 60mph. Never do anything but pedal to the metal!
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Old 08-11-2016, 07:20 PM   #7
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I had a 19 hour drive home so I've gotten a pretty good handle on how she runs on the highway
Being only 30 minutes was a MAJOR sales factor on mine.
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Old 08-11-2016, 09:04 PM   #8
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There's no reason to push a 466 past 2600.
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Old 08-11-2016, 10:06 PM   #9
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My bus has a 4.78 rear differential. 2426rpm is 62mph, 2600rpm is 66mph.
I've had it up to 70mph but turning over 2700 rpm. 2400 rpm "sounded" the best so that's where I drove it averaging 12 mpg.

If I do a gear swap it will be to 4.11 giving me 71 mph at that same 2400 rpm.
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Old 08-12-2016, 02:29 PM   #10
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Quote:
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My bus has a 4.78 rear differential. 2426rpm is 62mph, 2600rpm is 66mph.
I've had it up to 70mph but turning over 2700 rpm. 2400 rpm "sounded" the best so that's where I drove it averaging 12 mpg.

If I do a gear swap it will be to 4.11 giving me 71 mph at that same 2400 rpm.
Have you looked into the cost for our bus? Or if the gear and pinion are readily available?
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