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 > Your search for 'cummins isb' found 47 matches.

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  Subject Author Date Posted Forum
RE: What to do? Gas/diesel

I have had two P30 chassis class A's. One was an '82 fleetwood southwind 34', the other was a 1994 georgie boy pursuit 28'. The '82 had pretty good power and got about 6mpg. The '94 was LAZY when it came to power. Nowhere near the power of the '82. It also got about 6-7mpg. The heat of the engine and manifolds between the driver and passenger SUCKS. It would literally burn the side of your foot unless you were wearing boots. Fan noise, no exhaust brake, hydraulic brakes and no air ride are all things you'll deal with in a gas coach. I decided to sell the gas and try diesel. Wow, what a difference this is. Engine is now out back. I don't have to hear it or feel the heat. The driving went from white knuckle lumber wagon, to smooth and comfortable two finger driving as others have described. This thing climbs and descends hills with ease. I love the power of the DP and the exhaust brake. The air ride and brakes are the cherry on top. I have one large 13'6" slide that makes it feel like a mansion compared to one without a slide. The deal I found was a 1999 holiday rambler endeavor with the 5.9 275hp cummins ISB. The deal also came with a 2006 honda CRV tow behind, all set up for towing with brakes and the whole setup ready to go. I paid $32k for the whole thing. Oil changes are 17 quarts(less than $75 oil change and that lasts 10-15k miles). Change it once a year and you're good. I also have a 90 gallon fuel tank and onan 7500 quiet diesel generator that can run everything on board all at the same time. All the power you could ever want and it's pretty quiet. I have my RV loaded heavy with all my goodies. And I pull a trailer with all the sand toys that weighs about 6k. All of this and I am pulling down a hand calculated 9.63mpg. Holiday rambler endeavor's get my vote!
glamisorbust 03/26/15 10:16am Class A Motorhomes
RE: 275 hp Cummins

I also have a 5.9 275 cummins ISB in my '99 endeavor. I have been wondering the same thing. I ran into a gentleman at a gas station a few months ago that had a 5.9 cummins in his truck and swore up and down you could put a programmer into an RV with the same engine. He called it a smarty JR and said it cost about $500. He also said that the engine would go from a 275 hp to a 325 hp(or more) with just adding the programmer. Not sure if this is true, but might be worth buying if it actually works.
glamisorbust 03/21/15 11:48am Class A Motorhomes
RE: If you only had $40k to spend.........

Keep your eyes peeled and the deal of a lifetime will come your way. I started looking about this time last year, and by august 2014 the deal I was waiting for came my way. A gentleman wanted to sell his RV and toad together, would not separate them. So I purchased an immaculate 1999 holiday rambler endeavor DP with a 2006 Honda CRV toad for $32k. This was the whole package, towbar, brake system on toad, etc. Good thing I was also in need of a second vehicle!!! Mine has one large slide and air brakes, air ride, 5.9 cummins ISB, 7500 onan quiet diesel generator, all the options. We have used it 6 times since august(mostly week long trips) and we absolutely love it. A dream to own something this nice!
glamisorbust 03/19/15 09:58am Class A Motorhomes
RE: Fleetwood Excursion

I happened to glance at a 2015 Fleetwood Excursion 33D. It has a 300HP Cummins ISB 6.7L diesel engine. The coach I own has a 340HP Workhorse 8.1L gas engine. Both have the Allison 6 speed transmission. I'm no mechanic or engineer, but I can subtract. Would I not be losing 40 horse power? Would that some how be gained back because it is a diesel? Yes because you will be gaining a lot of torque at very low RPM. It would be a night and day difference driving. Not to mention its a pusher so it will be a quieter ride for you with the engine in the back.
mrkoje 03/08/15 12:06am Class A Motorhomes
Fleetwood Excursion

I happened to glance at a 2015 Fleetwood Excursion 33D. It has a 300HP Cummins ISB 6.7L diesel engine. The coach I own has a 340HP Workhorse 8.1L gas engine. Both have the Allison 6 speed transmission. I'm no mechanic or engineer, but I can subtract. Would I not be losing 40 horse power? Would that some how be gained back because it is a diesel?
Two Hands 03/07/15 05:46pm Class A Motorhomes
RE: What would you buy for a $175,000?

This is only 33' short by 7' of your wish, but what a deal: http://www.happydazerv.com/default.asp?page=xInventoryDetail&id=864742&p=1&vc=class%20a%20diesel&s=Year&d=D&vt=motorhome&fr=xallInventory In case the link doesn't work, it's a 2013 Fleetwood Excursion 33D The only problem is that it is a Cummins ISB-6 which is what is in a pickup truck and non-sleeved. Need to go to an ISC or bigger to get sleeves and more power. It will be a little under powered. but itis a good deal for someone that can over look the engine. Does that mean I need to sell my 42' with the same engine that gets 10mpg and goes down the freeway just fine and up every hill thrown at it? And it still can pull 10,000lbs. Wonder how this forum got so many Cummins engineers on it. And Freightliner should be sued for ordering rigs not capable ( according to some here) of performing as they are pushing the engines too hard. Somewhere along the line the measure of a MH capability is how fast it goes up a hill. For what it's worth the engines (ISB) were in many different platforms before they were ever put in a pickup truck.
et2 02/13/15 06:23am Class A Motorhomes
RE: What would you buy for a $175,000?

This is only 33' short by 7' of your wish, but what a deal: http://www.happydazerv.com/default.asp?page=xInventoryDetail&id=864742&p=1&vc=class%20a%20diesel&s=Year&d=D&vt=motorhome&fr=xallInventory In case the link doesn't work, it's a 2013 Fleetwood Excursion 33D The only problem is that it is a Cummins ISB-6 which is what is in a pickup truck and non-sleeved. Need to go to an ISC or bigger to get sleeves and more power. It will be a little under powered. but itis a good deal for someone that can over look the engine.
shaneperch 02/11/15 06:13pm Class A Motorhomes
RE: Which engine for a used Winnebago Journey?

In similar sized engines like the Cat C-7 vs the ISC, I would take the Cummins. When it comes to the Cat C-7 vs the Cummins ISB, I would definitely by the Cat. It's a well built engine and is definitely more powerful. Just make sure what transmission the two have. The Cat should be mated to the Allison 3000, but the smaller ISB might be mated to the Allison 2500. The Allison 2500 would always be a deal breaker because you can never uprate the power on the engine because the trans is maxed out at torque and HP.
DSDP Don 02/04/15 09:01pm Class A Motorhomes
RE: 2007 Monaco Cayman XL 37 pbd ???

"bcforce"....You'll be very disappointed with that coach. Our friends have that EXACT model. Here are the issues. -It has the 4 airbag chassis (Roadmaster R4R)and is VERY rough riding. I worked on our friends and added Koni shocks, adjusted the ride height and brought the air pressure down to the minimum for their weight and the coach is still rough riding. So much so, it knocks the clothes off the rear bedroom closet rod on every trip. -That coach has the recalled trailing arms and they would need to be replaced if it hasn't been done already, about $3500.00. -The 07 Cayman came with the Allison 2500 transmission and Cummins ISB engine. The engine has modest power and will move the coach along well (about 45 mph in the mountains towing a small toad). Typically, if more power is desired, the ISB can be uprated, but in the case of this coach, the transmission is already at it's max. Most savvy buyers will look for the Allison 3000, so upgrades can be made at a later time. -The Cayman, as well as most other Monacos in those years had paint issues. Unless it's been stored inside, the clear coat along the roofline is probably already failing. The 37' was very roomy with the four slides, but I think you'll be disappointed with the all the issues above.
DSDP Don 01/15/15 11:25am Class A Motorhomes
RE: Typical Fuel Mileage You Get With Your Gas or Diesel Class A

300HP Cummins ISB 6.7 Palazzo, 24K lbs 35ft long, 11.6MPG running 63 - 65mph towing Jeep wrangler on pretty flat roads. Going to play with Allison mode button this coming season on a long trip. Heard stories of 13+MPG in that mode... Very unlikely that the Allison transmission in economy mode will give you that kind of MPG. Flat roads= best MPG. Economy mode makes little to no difference on flat roads (i.e. you are in high gear in either mode all the time). Yes, economy mode will aid MPG in rolling hills and mountains, but you will not do better than on flat ground in those conditions. I used my econo mode thinking i was being smart, and then i tried it without it and it was better without it. Not sure why, seemed liked it just changed the shift points, so it didnt kick down as fast climbing hills. Once we hit CO I ended up shifting manually a lot. Using my RPM gauge as a guide as well as my engine display.
Fleetwood Couple 01/04/15 09:54pm Class A Motorhomes
RE: Typical Fuel Mileage You Get With Your Gas or Diesel Class A

300HP Cummins ISB 6.7 Palazzo, 24K lbs 35ft long, 11.6MPG running 63 - 65mph towing Jeep wrangler on pretty flat roads. Going to play with Allison mode button this coming season on a long trip. Heard stories of 13+MPG in that mode... Very unlikely that the Allison transmission in economy mode will give you that kind of MPG. Flat roads= best MPG. Economy mode makes little to no difference on flat roads (i.e. you are in high gear in either mode all the time). Yes, economy mode will aid MPG in rolling hills and mountains, but you will not do better than on flat ground in those conditions. And that information did come from another Palazzo owner I know personally and he drove his across the country. Somewhere on the order of 8000 miles last summer. So, he might be telling a fish story, but we will see. His Palazzo is the 33.2. Mine is a tad bit heavier 35.1. Might be plausible with what he's got. But mine, last season's best was 11.6 from NC to Florida on I 95. So yeah, pretty flat! But yeah, 11.6 is not bad considering I had a 6.0 F350 pulling a 40ft 16K lb fiver before this and the best I could squeeze out of that was 8MPG, if I was lucky. 4:30 gears, but it pulled like a scalded dog! :)
93mastercraft 01/03/15 06:10pm Class A Motorhomes
RE: Typical Fuel Mileage You Get With Your Gas or Diesel Class A

300HP Cummins ISB 6.7 Palazzo, 24K lbs 35ft long, 11.6MPG running 63 - 65mph towing Jeep wrangler on pretty flat roads. Going to play with Allison mode button this coming season on a long trip. Heard stories of 13+MPG in that mode... Very unlikely that the Allison transmission in economy mode will give you that kind of MPG. Flat roads= best MPG. Economy mode makes little to no difference on flat roads (i.e. you are in high gear in either mode all the time). Yes, economy mode will aid MPG in rolling hills and mountains, but you will not do better than on flat ground in those conditions.
wolfe10 01/03/15 03:48pm Class A Motorhomes
RE: Typical Fuel Mileage You Get With Your Gas or Diesel Class A

300HP Cummins ISB 6.7 Palazzo, 24K lbs 35ft long, 11.6MPG running 63 - 65mph towing Jeep wrangler on pretty flat roads. Going to play with Allison mode button this coming season on a long trip. Heard stories of 13+MPG in that mode...
93mastercraft 01/03/15 02:47pm Class A Motorhomes
RE: Typical Fuel Mileage You Get With Your Gas or Diesel Class A

I have a 2007 chevy 2500HD with a duramax. I used to have a 5th wheel toyhauler and loaded it up with sand toys. I never got more than 9mpg running 65mph. I sold the hauler and bought a gas class A, chevy P30 454 engine. Never got better than 8 pulling a trailer. 9mpg not pulling. Now I have a DP with cummins ISB 5.9 275HP and get about 8mpg pulling a heavy trailer. Not pulling I get about 10, running 65mph.
glamisorbust 01/03/15 10:52am Class A Motorhomes
RE: Slide issues

I'm with Wayne on this. You might want to consider a different chassis in particular with consideration of your desire to tow a heavy vehicle. The Freightliner chassis the Palazzo is built on utilizes a Cummins ISB engine paired with an Allison 2500MH transmission. Although adequate for the size coach the Allison has a gross weight limit of 33,000 Lbs. I don't know how much an empty Palazzo weights but you really don't want to over stress the transmission. Over heat it a few times with a heavy load and you might be facing an expensive rebuild. If you can find a coach within your budget with an ISC version engine and 3000MH transmission I think you might be a bit happier. Just because the builder installed a 10K hitch doesn't mean you are good to that weight. Run the numbers to ensure you will be within all the various limits. I am a bit surprised Thor installed a hitch of that size. Most rigs built on this chassis have a 5K hitch such as a Tiffin Red or a Coachman Cross Country.
Dale.Traveling 12/18/14 03:10am Class A Motorhomes
RE: Economy mode on an Allison Transmission

We have a 2014 Thor Palazzo with an Allison MH2100 and a Cummins ISB. With the mode switch on and on flat ground with the cruse control set I was able to get 15 MPG. With the mode switch off I was at 12 - 13 MPG.
msturtz 12/07/14 12:25am Class A Motorhomes
"Battery boost" question

Looking for an explanation………. Last week we decided to go camping. Motorhome had not been started in a month. Also, the previous 2 nights got into the low 20s so decided to plug block heater in (Cummins ISB). Got all loaded up and after about 2 hrs. attempted to start the engine. Turned key and had 2 “growls” and then engine would not turn over. Waited about a minute or so and tried again, nothing. I then depressed the “bat boost” switch and tried to start again but had the same results, nothing. I checked the operation of the “bat boost” contactor and it was working as I could hear it energize when the switch was depressed. The house batteries were fully charged as I leave the motorhome plugged in. Put a battery charger on the chassis batteries for about an hour and tried the above again with the “bat boost” but still had nothing. I then decided to call my road service. After a few minutes a tech came on the line and I explained all of the above to him. He then wanted me to try one more thing. He said get in the motorhome and hold the “bat boost” switch down for 1 minute but do not try to start. After 1 minute he told me (still depressing the “bat boost” switch) to try to start the engine. Turned the key and the engine turned over and fired right up. He could give me no explanation as to why the “bat boost” switch had to be held down for a minute so he apparently had run into this situation previously. So, perhaps someone can enlighten me as to what transpired for that minute the “bat boost” switch was held on and the house/chassis batteries were “shorted” together to allow the engine to turn over. Thanks, Richard
Scrooge39 11/28/14 07:09am Class A Motorhomes
RE: Newbie Questions on 6th day of first trip...

This morning before my Tuesday apt, I thought I would give it a start to see if anything has changed. Really nothing has changed, but rather than just crank it after the glow plug light when off, I left the key in that position before starting and the trans light stayed lit for about 10 seconds, and then goes out. So the trans light stays lit (warning message and the icon light) before the engine is even running. Not that this helps me determine anything, but I thought I would throw it out there, it might be interesting to someone. I wonder if I can get a trouble code off the transmission somehow in that short period of time. I do not know if one is even generated. Below are the details of the MH. The MH is a 2104 Winnebago Journey 36M, Freightliner chassis, 6 speed Allison trans 3000 MH, Cummins ISB XT 6.7 L Turbo Charged Diesel with 360 HP, and 3,600 miles on the odometer. Not sure what else I could tell you about it. I am not a handy automotive guy. The engine seems fine, always has (knock on wood). Even the trans seems to run fine (knock on wood again). Can't say whether the after treatment works or not. Not sure how I would know whether it is or is not working. I have not lost any engine power at all in all this. Thanks, Tom
sloman2001 11/09/14 10:24am Class A Motorhomes
RE: ISB 300 Power loss / Turbo Failure

Start with the filters, this is the most basic thing to do when you start loosing power, especially if the problem came on after refuelling. Also check the air filter, never know. 250 codes is a lot of codes. Ask them which codes, otherwise this is a shot in the dark. Then ask them what are the codes related to. At least, if they are not sure, ask them to clear the codes and run the engine or test drive the MH, then recheck the codes. You have the same engine as mine, cummins ISB 300 HP 2003. Might be turbo sticking but I doubt it because this problem would likely cause an intermitent problem, sometimes it would stick, sometimes it would let go and work again. The second thing on the turbo could be the electric motor that drives the VGT, variable vane, or the position sensor that tells the ECM what is the position of the turbo VGT. The VGT sensor can be replaced, if they do not have the sensor, they can take the one from the EGR to test it, same sensor. The electrical motor could stop working completly or could be intermitent. The wires to the turbo could also be at fault. If it is electrical, you should have a code that says low voltage/low current or no voltage to VGT. A test can be done. If they are not able to make the VGT working with a test equipment, try this: While someone is turning the Key in the ON position but not starting the engine, as the key comes on, you should feel two cycle on the VGT, just put your hand on it. If you feel nothing, then there is a problem either with the motor or the wires, hope not the ECM. If you have the DC electrical motor on the VGT, the motor is not servicable, according to cummins. Common cause to electrical motor is they get coolant bypassing the seal in the VGT mechanism, very poor design from cummins and very poor in solving recurent problems. Turbo must be replaced as an assembly if motor is shot. The last price quoted from cummins to me was $3500.00. I would say it takes about 4 hours to replace. I could have a rebuilt one for $2000.00 and the other for $2600.00. I am checking right now to see if a VGT assembly can be bought separatly from the turbo. Good luck, keep us informed.
Kidoo 10/21/14 04:03pm Class A Motorhomes
RE: Is 360 hp enough for for 38-40 ft class A

I have a 38' DP with a Cummins ISB 275 5.9 and it has enough power. I pull 6-8% grades at 40-45mph no problem. Would more power be nice? Sure would, but for the price I paid I am extremely happy!
glamisorbust 10/20/14 12:37pm Class A Motorhomes
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