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Old 04-09-2015, 05:57 PM   #1
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Recalibrating a 08 Cummins 350DP to 400

Understand a 350 can be recalibrated to a 400. Has anyone out there had this done and what performance (MPG, power, torque, etc.) have you noticed. Thanks!
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Old 04-09-2015, 07:53 PM   #2
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Quote:
Originally Posted by glemo81540 View Post
Understand a 350 can be recalibrated to a 400. Has anyone out there had this done and what performance (MPG, power, torque, etc.) have you noticed. Thanks!
I recommend you discuss with your Cummins Coach Care dealer. Could be a simple flash install depending which engine you have.
Recommend Cummins before buying upgrade from another company.
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Old 04-09-2015, 08:02 PM   #3
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ISC or ISL?

Could even be an ISB.
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Old 04-09-2015, 08:08 PM   #4
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ISC or ISL?
Need to know what you're starting with.
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Old 04-10-2015, 01:50 AM   #5
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Should have stated the engine is an ISL.
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Old 04-10-2015, 02:20 AM   #6
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ISL from 350 to 400

Cummins Customer Service is who told me recalibration is possible!
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Old 04-10-2015, 08:11 PM   #7
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Somewhere on this forum I remember reading that the 350HP ISL was a lightweight engine/transmission combination designed for better fuel economy. In my case it did not work well. My MPG runs at 7.2.
I'll be interested in your experience if you get the upgrade done.

Have a nice day - Darrel
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Old 04-10-2015, 08:25 PM   #8
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Quote:
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Somewhere on this forum I remember reading that the 350HP ISL was a lightweight engine/transmission combination designed for better fuel economy. In my case it did not work well. My MPG runs at 7.2.
I'll be interested in your experience if you get the upgrade done.

Have a nice day - Darrel
That's not very good mileage as you say!
Our Magna (46,503+ EMPTY) towing the Odyssey with an ISX 650 is getting 7.1 overall. That includes the Grapevine, Tehachapi and stuck in traffic after a wreck.
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Old 04-10-2015, 08:31 PM   #9
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