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Old 06-04-2021, 12:44 PM   #1
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Horsepower bump available for ISB 6.7?

Hi Guys: I am purchasing a new 2021 Tiffin Red 360 with the Cummins ISB 6.7 Diesel Engine. Is there a software horsepower upgrade for this model to 450 HP?

I know you can upgrade the 380 to 450 HP, not sure on the 360.

Jim P.
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Old 06-04-2021, 12:46 PM   #2
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Jim,


What transmission. That may be limiting factor other than engine longevity and cooling system capacity.
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Old 06-04-2021, 12:53 PM   #3
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Quote:
Originally Posted by wolfe10 View Post
Jim,


What transmission. That may be limiting factor other than engine longevity and cooling system capacity.

Allison 3000 Transmission.


Jim
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Old 06-05-2021, 09:37 AM   #4
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The literature shows up to 360 HP 800 ft/lb torque. As mentioned earlier the transmission rating for torque and cooling capacity would be the other limiting factors. With your engine serial number a Cummins shop can tell you definitively.
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Old 06-06-2021, 08:11 AM   #5
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450hp Cummins is an ISL, you are not going to get that from the ISB. ISL is 8.9 ltr.
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Old 06-08-2021, 10:17 AM   #6
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450hp Cummins is an ISL, you are not going to get that from the ISB. ISL is 8.9 ltr.
Ohhh, you can get that from a ISB. Turbo, injectors o-ring the head and studs, fuel system , emissions delete and a tune.

But it will cost $20k to do and probably sit broke down more than it runs
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Old 06-09-2021, 05:58 PM   #7
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Jim, maybe you should reconsider your purchase if you are already thinking about more power?
Is there a similar coach available with a Cummins ISL? The ISL is rated at 1200-1250 ft lbs vs 800 for the ISB. That's a 50% increase!
Also, look at the torque rating not the horsepower.
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Old 06-11-2021, 05:34 PM   #8
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You could get even more but the op asked about a flash, not gonna happen.

Quote:
Originally Posted by Wild Card View Post
Ohhh, you can get that from a ISB. Turbo, injectors o-ring the head and studs, fuel system , emissions delete and a tune.

But it will cost $20k to do and probably sit broke down more than it runs
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