Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-01-2015, 09:29 AM   #1
Junior Member
Join Date: Oct 2014
Posts: 5
Thor Challenger Question

In the May 2015 MOTORHOME magazine article discussing the feature difference between a gasser vs. diesel, the writer states MH in the 38 foot range would strain a bit with a fully loaded MH. I've never read that anywhere before and was wondering how true that was. This could be a major game changer for the market I'm shopping in.

Guamboy87 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-02-2015, 12:07 AM   #2
Community Moderator
Scarab0088's Avatar

Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2012
Location: San Diego, CA
Posts: 10,655
I submit that the Author was off-base to describe a Ford F53 (the only gas Class A Chassis currently available) as "straining a bit" for a 38' RV. Every RV builder is using the chassis for their RV's up to and including the 39 footers.

That includes, TMC, Newmar, Fleetwood, Forest River, Winnie...etc.

That chassis has 6 GVWR's and 9 wheelbases, offering 320HP in the 6.8L V10, and coming in 2016, will have the 6speed TorqShift transmission currently used in the Super Duty truck line:
2016 Ford Stripped Chassis F-53 Motorhome | See All The Stripped Chassis F-53 Motorhome Highlights | Ford.com

These chassis' have a GCWR of 30,000lb and haul these Class A's around with little problem.

In fairness, it should be understood that driving these RV's is not like driving a Diesel Pusher with a 9- plus liter engine. The engine WILL rev up to over 4,000RPM to climb steep hills. They will roll down the freeway at normal speeds like 70-75, but will turn over 1,500RPM. These points are normal and the engines are designed to do it.

Best luck

Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
Scarab0088 is offline   Reply With Quote
Old 06-02-2015, 09:40 AM   #3
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,446
Just because several manufacturers are offering it does not mean it's not "straining a little". At the end of the day, it comes down to horsepower, weight, and chassis design. The primary drawback is that the increased weight and drag that comes with a larger size requires the engine to work nearer its peak output more of the time. On a gas engine like the Ford V10, that means higher RPMs to get more horsepower. It also means the leaf spring suspension is carrying a heavier load, so its needs to stiffened up for it. At some point it makes better sense to use a low-reving diesel engine, air suspension, and a chassis designed from the ground up to handle weights well upwards of 35k lbs. Many DPs easily handle GVWRs of 45k or more. Could you build a gas-engine chassis to do that? Sure, but that's not where the F53 shines. It is designed to provide a range of GVWRs, with the sweet spot around 20k-22k. It can go lower and also higher, but higher is "stretching it" near its design limits. Not overloaded yet, but working hard to do the job.

So, there is nothing wrong with a 38-39 foot gas rig, but you would probably like that same rig on a diesel pusher chassis much better. Quieter, for one thing, and smoother riding, and likely with a bit better fuel economy as well.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
A/C & Gas Heater Maint Question Bilgerat Fleetwood Products Owner's Forum 0 03-11-2015 06:46 PM
Question about Atwood water heaters corne73 RV Systems & Appliances 21 04-02-2014 07:28 AM
TV F150 tire question RyRo70 Trailer Towing and Tow Vehicles Discussion 24 04-01-2014 10:05 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:35 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.