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Old 05-11-2016, 02:53 PM   #1
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ISB 6.7

Is the Cummins ISB 6.7 any stronger than the 6.7 found in pickup trucks?

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Old 05-11-2016, 05:36 PM   #2
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The 6.7 in my 14 Ram is 375HP and 800 FP torque. It would not be hard to get much more.

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Old 05-11-2016, 05:45 PM   #3
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My ISB 6.7 is 340 HP, so I guess it's lower than a truck version.
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Old 05-11-2016, 06:46 PM   #4
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It depends on what year and model engine. My 2010 has 350 hp and 650 ft/lb torque.
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Old 05-12-2016, 09:35 AM   #5
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Does stronger mean more horsepower & torque, or better reliability?

The 6.7L comes in several horsepower & torque ratings, tied to the application needs and the transmission to be used with it. You get what the engine was configured for in that installation, so check the specs for that particular one.

In terms of physical strength, the engine block is the same but there may be minor internal differences, plus there are usually substantial differences in cooling system, fuel lines and filters, alternator, a/c compressor and other components that make up the power plant as a whole. So no, it's not "the same engine as a pick-up truck".
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Old 05-12-2016, 09:43 AM   #6
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Originally Posted by Algonquin View Post
My ISB 6.7 is 340 HP, so I guess it's lower than a truck version.
The chassis/coach, manufacturer may have specified the HP , based on the transmission , a 2500 series Allison lists 340 HP , 700 FtLbs torque, as max.
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Old 05-12-2016, 01:18 PM   #7
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There are slight differences between the pickup version and the industrial version, but they are essentially the same basic design. Power output is controlled by many variables, including different hard parts inside the engine, as well as the external electronic controls. As pointed out by Skip, the rest of the driveline could be the limiting factor.

The term "stronger" is up to interpretation.
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Old 05-17-2016, 01:52 AM   #8
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It's a Cummins so it's a great engine and so is the transmission attached to it. As stated by others, the rest of the drive train are the limiting factors, the various flavors of Allison trans mission are designed to take only so much hp so they limit the output of the engine to match it. If you want more power replace the transmission with a Allison 3000 or 4000 then you can unleash the power of the Cummins.

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