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Old 12-01-2008, 07:15 PM   #1
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Chassis Evolution:

MaxxForceTM engine brings diesel choice to popular Workhorse platforms

LOUISVILLE, Ky. — (Dec. 2, 2008) -- New Workhorse choices in diesel power have brought more fuel efficiency and pulling power into what was once the exclusive province of gas motor homes. A front diesel engine option is now available for two proven and popular Class A motor home chassis — the Workhorse W20 and W22.

Called the W22D and W20D, the 22,000 and 20,500 lb. GVWR diesel-powered chassis will now give RV buyers more new choices for the platforms that have become known for their exceptional ride, handling and performance. The W20D will make its debut at the Workhorse Booth, No. 2018, in the East Hall at the National RV Trade Show in Louisville Dec. 2 to 4. Two major motor home manufacturers will also display models built on the W20D.

This evolution of the groundbreaking W20/W22 gas platforms marks the latest appearance of a Navistar MaxxForce engine on the motor home scene. This time it’s the MaxxForce™ 7, a 230 horsepower 6.4L V8 powerplant that puts out a hefty 620 lb.-ft. of torque to provide exceptional pulling power while achieving superior performance, reliability and fuel economy. Navistar also touts the MaxxForce 7 as a quiet diesel designed to greatly reduce the noise and vibration of the engine, providing an exceptional driving experience for the RV owner. Couple the MaxxForce 7 with the six-speed Allison transmission and the RV owner will experience a new level of driving ease.


2009 W Series D Platform

The turbo with charge-air cooler is tuned to reduce noise, improve fuel economy and make MaxxForce 7-powered vehicles responsive and easier to drive. The MaxxForce 7 will provide a True Diesel™ emissions solution for 2010 that uses only diesel fuel, not both diesel and urea as required by SCR emissions control. Instead, advanced EGR and proprietary “In-Cylinder’ technology is used to meet 2010 emissions standards without additional after-treatment or negative impact on fuel economy.

“In today’s economic environment, product differentiation becomes even more critical to manufacturers,” said Workhorse Vice President of Marketing and Product Planning Tony Monda. “Navistar’s MaxxForce™ engines provide a one-two punch — differentiation and fuel economy. Even though prices have dropped recently, consumers are very sensitive to the issue.”

“The W20 and W22 are our most popular chassis. People love the maneuverability that comes with their 50-degree wheel cut along with the stable, comfortable ride these platforms provide. Now they also have the power and efficiency of the MaxxForce™ engine. This advancement brings diesel benefits well into the price range of the smaller gasoline coaches that are becoming more prominent.”

Both Workhorse and MaxxForce are affiliates of Navistar, “These new platforms typify the benefits of the great synergy we are developing within Navistar,” said Monda. “With this excellent engine now married to some of our most well-received chassis, the RV market is beginning to see some exciting new product developments.”

Service on the W20D and W22D chassis can be performed at more than 500 Workhorse Service Centers across the U.S. and Canada, while the MaxxForce engine will be serviced at RV participating International Truck and Engine Service dealers.

Workhorse Custom Chassis
Workhorse Custom Chassis is an affiliate of Navistar International Corporation (NYSE: NAV), a holding company whose subsidiaries and affiliates produce International® brand commercial and military trucks, MaxxForce™ brand diesel engines, IC brand school and commercial buses, and Workhorse® brand chassis for motor homes and step vans. It also is a private-label designer and manufacturer of diesel engines for the pickup truck, van and SUV markets. The company also provides truck and diesel engine parts and service. Another affiliate offers financing services. Additional information is available at www.Navistar.com/newsroom.

For additional information about Workhorse visit Workhorse.com.
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Old 08-29-2009, 07:56 PM   #2
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I like everything about these new Workhorse (FREDs) FRont Engine Diesel class A chassis, except I think they went too small with the fuel tank. That 40 gallon fuel tank is my only beef. I know a couple of guys that tow big 5th. wheels with 1 ton Ford pick-up trucks equipped with the 6.4L MaxxForce 7 Navistar engine and they like the power and quietness of this engine. Unfortunately, that 40 gallon fuel tank is a non-starter for me and I expect to buy a new class A within the next 24 months. Chuck60
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Old 09-12-2009, 01:44 PM   #3
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40 gallon? The gas W22 has a 75 gallon tank. Did they make the diesel smaller?
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Old 09-13-2009, 01:13 PM   #4
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Quote:
Originally Posted by RV Roamer [Gary] View Post
40 gallon? The gas W22 has a 75 gallon tank. Did they make the diesel smaller?
Although that's the published quantity as of the writting of that article, there is a rumor that the capacity will be more upward of 60 or more gallons.

The reason why the smaller tank is I believe they are saving weight. It is expected that a W20D will get somewhere on the order of 14 MPG or approximately a 500 mile range. This is well within by daily fueling expectations. A 60 will extend that range quite a bit. I hoping that we'll see a 75.
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Old 09-14-2009, 01:46 AM   #5
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Driver, they need a minimum of 60 gallons. A 500 mile fuel range is not nearly enough for me. When we leave Wyandotte, Mi for Florida, my first fuel stop is at the Flying J in Resaca, Georgia. Also, when we are driving from Wyandotte, Mi. to Scottsdale, Az., the last thing I want to do is stop for fuel every 450-500 miles. There is no guarntee that the typical W-20D is going to get 14.0 MPG, especially the 38'+ Winnebago class A sitting on the HD W-20D. No way is that monster of a class A with multiple slides is going to get 14.0 MPG. 10-11 is more like it! I do hope that Workhorse C.C. makes the change to a larger fuel tank, because if they don't, informed and knowledgeable Rvers, won't buy them for that very reason. Once again, other than the fuel tank issue, I think it is a solid (FRED) FRont Engine Diesel chassis. And Freightliner could use a little competition! JMHO, Chuck60
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Old 09-14-2009, 06:35 AM   #6
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There is no guarantee that the typical W-20D is going to get 14.0 MPG, especially the 38'+ Winnebago class A sitting on the HD W-20D. No way is that monster of a class A with multiple slides is going to get 14.0 MPG.
Chuck60, The W20D was not engineered to compete in that market segment. Any W20 gas or diesel would be overloaded when used on a 38 foot motorhome if based on a W20 (20,500) weight range. I know I had one, a 2001, 37G Adventurer on a W20.

Workhorse has readied a W22D class chassis and it would not take long at all to deliver those if they were ordered. I think the 22K weight range would be ideal offering manufacturers the capability to build ~35 foot motorhomes. I would expect that a W24 weight range may also be possible when the 8.1L engine inventory is exhausted but we’ll have to speculate on that at a later date.

Given the current types on the W20D like the Serrano and Vista, these motorhomes have 190" wheelbases, 32 feet or less and are designed to be light weight and aero shaped as much as possible.


2009 Four Winds Serrano 31V


2009 Winnebago Vista 30W

These are the first 2 examples of Workhorse Front Engine Diesel powered motorhomes. The key ingredient for each is light weight and a 190" wheelbase. Given the light weight it is likely that 14 MPG can be achieved.

Sitting here at Ocean Lakes FCG in Myrtle Beach, A Triple E rolled in here on a FRED and that machine's engine was loud from the outside. The MaxxForce 6.9L V8 engine is a lot quieter than the Cummins 5.9L I6.

Customers that are considering a front engine diesel when presented an A-B comparison just on the sound issue alone may choose the quieter V-8 engine. I have been told that inside a W20D powered vehicle, under most all throttle positions, the MaxxForce 7 unexpectedly presents a non-diesel like sound and can be easily compared to a gas engine.

As 2010 rolls out front engine diesels may gain more market share however what is going to be key in people's minds, as you initially commented, is that fuel capacity is going to be a deciding factor between A or B. RVers dry camp and use generators, a 30 gallon tank offers no reserve for these folks as they would be breaking camp to refuel more often.

Engine requirements, weight considerations and MPG calculations are one thing however the over all RV package is another. With my 75 gallon tank running my generator I can expect at least 50 hours of run time at full load and more if being conservative. A 30 gallon tank would only be able to provide 20 hours of run time.
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Old 09-14-2009, 11:36 AM   #7
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Driver, now I want you to check out the Winnebago "Sightseer" 37L, which happens to be 38'3" long, has (3) slides, a 248" wheel base, built on a HD W20D or one could call it a W22D, complete with 40 gallon fuel tank. Now come on, you can't see what is wrong with this picture? That son of a gun is bigger than my Allegro Bay 37DB, has an extra slide, a longer wheel base, heavier engine and generator, and is equipped with a 40 gallon fuel tank compared to my 75 gallon tank. This is a big class A with a small tank! I just want Navistar/Workhorse to realize they have made an engineering mistake and fix it! A couple of years from now, you and everyone else is going to say, "ya know, the Bagman/Chuck60 was right all along"! Chuck60.
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Old 09-14-2009, 01:47 PM   #8
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Quote:
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This is a big class A with a small tank! I just want Navistar/Workhorse to realize they have made an engineering mistake and fix it!
Bagman, It certainly won't take a couple of years for me to agree with you! You're right! A W20, under a 37 foot motorhome with a 248 inch wheelbase is a big rig alright and I'm going to check to see if that's in fact a W22D and not a W20D. I believe it is. W20s just don't run 8,000 pound fronts and 15K rears.
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Old 09-14-2009, 02:05 PM   #9
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Driver, it is the Heavy Duty W20D or W22D, but still a 38'3" class A with (3) slides, 248" wb and 40 gals. of fuel, just doesn't make it. Here is what I would like to see: The std. W20D with a 60 gal fuel tank and the heavier version W22D with a 90 gal. tank. Then Workhorse could not only claim a 6.4L MaxxForce 7 engine that is quieter and vibrates less than the Cummins 6.7, it also should have more power when taking off from a standing start due to the V-8 configeration, along with Stabil-Ride suspension and a 90 gallon fuel tank and a chassis like that would have many features that the Freightliner FRED doesn't have! You have to give potential class A buyers a good enough reason to make the big change. Back 6,7,8 years ago, many of us were flocking to the Workhorse W20 & W22 because of two reasons. They were the 8.1 Chevy Big Block Vortec engine and the Allison 1000 5 speed transmission. The migration to Workhorse was massive and if they want to achieve the same results with their new FRont Engine Diesel chassis, they have to give the customer a better mouse trap (analogy). Personally, I like Navistar Trucks and I like Workhorse Custom Chassis, but they have to get it right! Regards, Chuck.
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Old 09-20-2009, 01:53 PM   #10
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14 MPG?? Real world?? I doubt it. Maybe in an "up to" scenario - like the time we got 10MPG in our Vectra (36RD - C7) towing at 65. So what if it was downhill for 120 miles with a 40 MPH (literally) tailwind!

14 is what we average in the View ('08 with the V6 MB diesel) which is 10,000# lighter and has a better aero profile. (And, yes, we are a two motorhome family.)
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