Community Forums

jimmy braden · 09-26-2018, 01:03 PM

Yeah, tend to agree it will be marginal with a toad. 5.9s really need to be wound up, keep it closer to the HP peak than the torque peak (bc they dont make a lot of torque - 860max). ANd every now and then, you see a 5.9 grenade. IMO, even the 6.7s are marginal now with DEF/DPF and usually more mass in current models.

Terry L T · 09-26-2018, 03:07 PM

When I was doing research before buying a d/p the rule was 1 hp per thousand pounds. So 24,000 plus toad 3,000 equals 270 HP. It is torque that counts. I have a neighbor that bought a new Holiday Rambler with the small Cummins and he is very unhappy, but he is a car guy (likes performance).

Dutch Star Don · 09-26-2018, 03:26 PM

I think the size of the coach is important. At 31', the 275HP will probably do a respectable job as long as you don't attach a heavy toad. Learn where it's power band is and drive accordingly when climbing hills.

Gary RVRoamer · 09-26-2018, 04:35 PM

The figure of merit for motorhome horsepower is 1 hp per 100 lbs of loaded coach weight. The rv manufacturers select engines on the basis, using the coach GVWR. Personally, I prefer to add in the towed weight if you expect to tow a car (or trailer), since that's what you really haul up hills.

1/100 lbs won't give you hot performance, but it gets the job done. Your family car probably has 5x or more that much, e.g. 1 hp per 20 bs of loaded weight.

Roger G · 09-26-2018, 05:38 PM

A Breeze is essentially a 3/4 scale Class A. It's smaller than most any competitors comparable coach. I've never driven one but I would think the perceived power would be similar to a full size coach in the 37-40 foot range with a 360 hp engine.

A Traveler · 09-26-2018, 05:57 PM

Quote:

Originally Posted by edgray

Unless I'm not seeing correctly, something about those "specs" does not seem right to me. The total of the GAWRs (front and rear) appears to be LESS than the GVWR of the coach. Not sure how Tiffin can rate the coach for more weight than the sum of the axle ratings...

GAWR is 23,500 pounds - 8,500 + 15,000 = 23,500.
GVWR is 24,500 pounds.

You didn’t add correctly.

wrapperman · 09-26-2018, 07:18 PM

Quote:

Originally Posted by Terry L T

When I was doing research before buying a d/p the rule was 1 hp per thousand pounds. So 24,000 plus toad 3,000 equals 270 HP. It is torque that counts. I have a neighbor that bought a new Holiday Rambler with the small Cummins and he is very unhappy, but he is a car guy (likes performance).

I agree with Terry L. It is the torque that counts the most. You have plenty of torque to keep you from slowing down, especially at 1600 RPMs. What you need to check out is how many RPMs is it turning at 50, 60 and 65 MPH. If you are only turning 1600 RPMs at 50 you should be okay. Torque is basically what keeps you from slowing down but it does get complicated trying to figure it out.
The torque will go down after 1600 RPMs while the HP goes up until 3200 RPMs. Gearing converts HP to torque but like I said, it's complicated.

dmatt13 · 09-26-2018, 07:35 PM

Thanks everyone. I'm not sure I want to pay that kind of money for a diesel only to be limited to what I can tow, store, etc. Of course this is not a car/truck where I want quick acceleration but I don't want to regret my choice after laying down that kind of coin!

winniman · 09-26-2018, 07:37 PM

My previous rv was a Winnebago 37g with the v10 ford gas engine. My current rv is a 2000 370 Coachmen Santara with the 24 valve, 5.9 cummins. Im not sure if it is the 275 hp or 300 as I cant find any info to tell me one way or the other. All I know is both coaches were the same length at 37 plus feet. The diesel definitely has more power on the hills, and for towing. It also weighs at least three or four thousand pounds more. My gross weight is just under 27000 lbs. Im happy with the power. Its an rv, not a sportscar.

Ray,IN · 09-26-2018, 09:10 PM

Quote:

Originally Posted by winniman

My previous rv was a Winnebago 37g with the v10 ford gas engine. My current rv is a 2000 370 Coachmen Santara with the 24 valve, 5.9 cummins. Im not sure if it is the 275 hp or 300 as I cant find any info to tell me one way or the other. All I know is both coaches were the same length at 37 plus feet. The diesel definitely has more power on the hills, and for towing. It also weighs at least three or four thousand pounds more. My gross weight is just under 27000 lbs. Im happy with the power. Its an rv, not a sportscar.

Take a photo of your engine data-plate, then call or visit any authorized Cummins repair shop, aske them to decode your engine CPL number and other numbers.

edfirebird68 · 09-26-2018, 11:06 PM

Quote:

Originally Posted by gary rvroamer

the figure of merit for motorhome horsepower is 1 hp per 100 lbs of loaded coach weight. The rv manufacturers select engines on the basis, using the coach gvwr. Personally, i prefer to add in the towed weight if you expect to tow a car (or trailer), since that's what you really haul up hills.

1/100 lbs won't give you hot performance, but it gets the job done. Your family car probably has 5x or more that much, e.g. 1 hp per 20 bs of loaded weight.

proven truth!

oh yeah and cummins quick serve is free to noncommercial users up to 5 engines! all the info and parts lookup u need all using data plate info

agilabs · 09-27-2018, 03:47 AM

Quote:

Originally Posted by Sundancer268

I have 230 HP 5.9 12 valve and I go any where I want to go. Sometimes only 25 MPH, but I get there. My coach is 23000 pounds plus and I tow a 3000 pound car. I am never in a hurry so I don't worry about the HP, I just get in the right lane and let the world go by. Sometimes I have to pull out and pass a Semi-Truck that is going slower than I and sometimes they pass me.

I don't know about most of the folks on here, but I don't want to be doing 20-30mph climbing a hill. But I will also drive 1000 miles a day to get where I'm going. Wife and I made it from Seattle to with Florida in 3 days...

speed racer · 09-27-2018, 06:37 AM

What you need to know is torque moves the weight and HP keeps it moving. I will admit that the 275HP cummins is not a stump puller but it will do a better job than the V10.

desertdd · 09-27-2018, 06:50 AM

My first motor home was a 36 ft Discovery with a 5.9 Cummins. We pulled a 20 ft cart trailer with a Geo Tracker and a ATV. The little 5.9 actually did quite well and got us where we wanted to go. That is until the #53 block cracked from one end to the other.