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340HP 6.7L Cummins Question


Phil and Micky

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Some people say you need at least 1hp for every 1,000 pounds of weight on a diesel pusher. A 40-foot DP could get over 34,000 lbs pretty easily nowadays but it depends on the rig and it also depends on what it is you're towing.

 

Modern DPs generally go above that figure; sometimes well above, at least for the top-of-the-line models. We have a 36' DP that tops out at 22,500 lbs and was fitted with a 240hp 5.7L Cummins. But the original owner put a Banks Stinger package on it and that boosts the hp up to around 290hp (according to Banks) and greatly increases torque. We tow a pretty light Jeep Wrangler with a soft top and sides, half doors and 4cyl engine (3100lbs) and our rig gets reasonable fuel mileage (10.4mpg over a 2,000 mile trip Dec/Jan) and still manages to pass the big trucks on the hills.

 

It also depends on how you drive. If you're patient and do 200 miles a day it might be just fine. If you drive 400 miles a day or get upset when an 18-wheeler passes you on a mountain grade then not so much...

 

WDR

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Some people say you need at least 1hp for every 1,000 pounds of weight on a diesel pusher. A 40-foot DP could get over 34,000 lbs pretty easily nowadays but it depends on the rig and it also depends on what it is you're towing.

 

Modern DPs generally go above that figure; sometimes well above, at least for the top-of-the-line models. We have a 36' DP that tops out at 22,500 lbs and was fitted with a 240hp 5.7L Cummins. But the original owner put a Banks Stinger package on it and that boosts the hp up to around 290hp (according to Banks) and greatly increases torque. We tow a pretty light Jeep Wrangler with a soft top and sides, half doors and 4cyl engine (3100lbs) and our rig gets reasonable fuel mileage (10.4mpg over a 2,000 mile trip Dec/Jan) and still manages to pass the big trucks on the hills.

 

It also depends on how you drive. If you're patient and do 200 miles a day it might be just fine. If you drive 400 miles a day or get upset when an 18-wheeler passes you on a mountain grade then not so much...

 

WDR

WDR,

Thank you for the quick reply. It looks like the combined weight of coach and toad will come in at about 31K.

 

Thoughts?

Phil

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Depends on what you call good. It does get better MPG then others. It will get you up any hill pulling a toad. Usually faster then any 80K lb semi truck.

But slower then the 400-600 HP MH engines.

It does take less gal for a oil change then other diesels.

 

Probably many more MH from 26' to 40' have that engine 5.9-6.7L then any other engine out there.

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