Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 12-02-2008, 07:56 PM   #1
Senior Member
 
Capt Joe's Avatar
 
Workhorse Chassis Owner
Join Date: Mar 2000
Location: Panama City, FL
Posts: 208
While reading the thread on "Hypermiling", I got to thinking about ways to drive my MH to increase my fuel milage.

While on the road, I generally have my instantanious MPG readout active. This really gives me a quick indicator of just what a little bit of pressure on the gas pedal does to you fuel burn as well as what even a slight incline does as well...and, we've all seen the pictures of the indicators while coasting down a hill and showind MPG as much as 75mpg and higher...much higher.

Well, that got me to thinking about accelerating from a stop in our heavy RVs. Most of the time, I take the slow and smooth acceleration route and many times I see the instantanous MPG readout down in the 3 mpg or lower range even while trying to feather the gas pedal real easy. Then at times, I'll just keep up with the traffic and don't really notice a whole lot lower MPG numbers...and the low numbers seem to be there a lot shorter time.

So, which way of driving should give the best fuel economy...in the long run...., the slow and steady or the harder more rapid getting up to speed? Now I'm not talking about putting the pedal to the metal or anything like that, just keeping up with most of the traffic, which is pretty easy to do in my 32V Brave with the 8.1 and Allison but I do have to put my foot into it a bit.

Any thoughts, especially any with test or data to back up your thoughts, will prove, IMHO, to be interesting and hopefully beneficial.

Discussion, please....
__________________

__________________
Capt Joe

2004 Winnebago Brave 32v on W20 w/8.1L and Allison
Capt Joe 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 12-02-2008, 07:56 PM   #2
Senior Member
 
Capt Joe's Avatar
 
Workhorse Chassis Owner
Join Date: Mar 2000
Location: Panama City, FL
Posts: 208
While reading the thread on "Hypermiling", I got to thinking about ways to drive my MH to increase my fuel milage.

While on the road, I generally have my instantanious MPG readout active. This really gives me a quick indicator of just what a little bit of pressure on the gas pedal does to you fuel burn as well as what even a slight incline does as well...and, we've all seen the pictures of the indicators while coasting down a hill and showind MPG as much as 75mpg and higher...much higher.

Well, that got me to thinking about accelerating from a stop in our heavy RVs. Most of the time, I take the slow and smooth acceleration route and many times I see the instantanous MPG readout down in the 3 mpg or lower range even while trying to feather the gas pedal real easy. Then at times, I'll just keep up with the traffic and don't really notice a whole lot lower MPG numbers...and the low numbers seem to be there a lot shorter time.

So, which way of driving should give the best fuel economy...in the long run...., the slow and steady or the harder more rapid getting up to speed? Now I'm not talking about putting the pedal to the metal or anything like that, just keeping up with most of the traffic, which is pretty easy to do in my 32V Brave with the 8.1 and Allison but I do have to put my foot into it a bit.

Any thoughts, especially any with test or data to back up your thoughts, will prove, IMHO, to be interesting and hopefully beneficial.

Discussion, please....
__________________

__________________
Capt Joe

2004 Winnebago Brave 32v on W20 w/8.1L and Allison
Capt Joe is offline   Reply With Quote
Old 12-03-2008, 03:43 AM   #3
Senior Member
 
Chickadee's Avatar
 
Newmar Owners Club
Join Date: Dec 2007
Posts: 2,027
Capt. Joe: Hey, thanks for the post. I've wondered the same thing. I too keep an eye on the "Fuel Inst." (MPG readout). Ain't to encouraging pulling upgrade when readout drops down to 3 mpg, BUT, WOW!...it's fun on those downgrades when showin 75, 85, 95 and into the hundreds mpg's. Guess there must be MORE upgrades in this country than downhills, since that dang "AVE mpg" doesn't improve much. Maybe better route planning would help...eh? (...let's see now...ofcouse everyone knows headin North into Canada and Alaska HAS to be UP-hill....then headin South must be downgrade. But this country is mostly laid out East & West....soooooo, awwwww, I'll NEVER get it figured out ) Steve
__________________
2014 Newmar 3103 BAYSTAR/Triton V10 w. Banks/05 Honda Element toad
Chickadee is offline   Reply With Quote
Old 12-03-2008, 03:46 AM   #4
Senior Member
 
read & learn's Avatar
 
Newmar Owners Club
Join Date: Sep 2006
Location: Edgewater, NJ-Now touring the USA
Posts: 955
If you really want to see what hypermiling is all about google it. There are some very safe ways of increrase mpg.
ex: look ahead for red lights and start to coast and try not to have to stop completly as it takes more fuel to get back up to speed from a complete stop than a rolling slow down.
Remember there are many unsafe things that hypermilers do.
__________________
2005 KSDP 3910-----2007 Jeep Liberty

THE MIND IS LIKE A PARACHUTE, IT MUST BE OPEN TO WORK
read & learn is offline   Reply With Quote
Old 12-03-2008, 03:58 AM   #5
Senior Member
 
tmar10's Avatar
 
Fleetwood Owners Club
Appalachian Campers
Ford Super Duty Owner
Carolina Campers
Join Date: Jan 2008
Location: Four Oaks, NC
Posts: 502
We knew we were buying fuel loving beasts when we signed on the dotted line. My driving habits have not changed with the increase in fuel costs or changing economy. I drive at a reasonable and safe speed, use a little common sense and fill up before I reach a 1/4 tank.
__________________
Thomas & Betty w/Bailey & Gypsy (our fur-bearing masters)
07 Bounder 35e (F53)
07 Nissan Frontier or 2010 FLSTC toad
tmar10 is offline   Reply With Quote
Old 12-03-2008, 05:13 AM   #6
Senior Member
 
Capt Joe's Avatar
 
Workhorse Chassis Owner
Join Date: Mar 2000
Location: Panama City, FL
Posts: 208
I certainly agree that we knew about the fuel guzzling properties of our RVs and I have not really changed my driving habits very much either.
I have always tried to drive in a manner that will return a reasonable economy. I think that while there are other things going into the price of fuel, the laws of supply and demand do figure into the equation and I certainly do feel a responsiblity to do my part by burning less fuel thereby decreasing demand in helping to keep the price down from the $4 per gallon we were paying on our trip to the Keys back in June. Getting ready, suppose to leave this afternoon, for a 1000 miler (with a change due to our sister in laws father's death yesterday will probably now turn into a 1400 miler) and the current gas prices will certainly make it a lot less expensive. No complaints...As I use to tell my boat customers..."If you are going to play, you GOTTA PAY".
Which brings me back to my original question... Is it better to use the egg between my foot and gas pedal to get up to cruising speed or be a bit more aggressive in acceleration to get to cruising speed more quickly?
Inquiring minds want to know....
__________________
Capt Joe

2004 Winnebago Brave 32v on W20 w/8.1L and Allison
Capt Joe is offline   Reply With Quote
Old 12-03-2008, 11:55 AM   #7
Senior Member
 
RedneckExpress's Avatar
 
Vintage RV Owners Club
Join Date: Jul 2006
Location: Sauvie Island, OR
Posts: 2,353
Send a message via ICQ to RedneckExpress Send a message via AIM to RedneckExpress Send a message via MSN to RedneckExpress Send a message via Yahoo to RedneckExpress
Personally, I use the egg method. You're also reducing the strain on the automatic from heat generation cause by spinning the torque converter in the open position, or at least it is in my case, a 5.9L V8 Gas engine can only accelerate 11-12k lbs so fast.... It takes me a mile or two to get up speed on most occasions. Been more than one time where I'm having to merge into the slow lane at 45 mph. Those acceleration lanes always seem to get shorter every time they build a new interchange....
__________________
'92 Dodge W250 "Dually" Power Wagon
'74
KIT 1106 Kamper Slide-in Truck Camper
'06 Heartland Bighorn 3400RL Fifth wheel
Follow along with me in the The Journey of
RedneckExpress is offline   Reply With Quote
Old 12-03-2008, 12:54 PM   #8
Senior Member
 
RVDriver's Avatar
 
Join Date: Nov 2003
Location: Maplewood, MN, USA
Posts: 204
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">So, which way of driving should give the best fuel economy...in the long run...., the slow and steady or the harder more rapid getting up to speed? Now I'm not talking about putting the pedal to the metal or anything like that, just keeping up with most of the traffic, which is pretty easy to do in my 32V Brave with the 8.1 and Allison but I do have to put my foot into it a bit. </div></BLOCKQUOTE>

Capt Joe,

After you overcome rolling friction, (RV will Coast) any hard accelerating would result in no additional increase in mpg. IMHO Enough pressure on gas pedal to obtain crusing speed should be all thats required. (in other words) "If you are not gaining speed, and MPG readout is decreasing you are wasting fuel". Yes it will drop to 3 or so mpg, but if you are gaing speed at 3 mpg don't apply more pressure on the gas pedal.

Now that said, the only time I have mine on "Instant Read Out" is by mistake, I always drive wilth "Average Read Out" BUT I really watch it when going up an incline!
__________________
Bruce and Dyanne
RVDriver is offline   Reply With Quote
Old 12-03-2008, 02:44 PM   #9
Senior Member
 
Workhorse Chassis Owner
Join Date: Jun 2006
Location: Northwestern Montana
Posts: 3,138
I accelerate from stops with the egg method, unless going onto an interstate or freeway on ramp. Going too slow to merge into traffic is really dangerous. Also I do not place too much stock in the MPG shown on the readout in either instantanious or average, it is known to be in accurate. Agree with RVDriver above, as long as you are gaining speed, don't acellerate, unless of course you are drag racing with a Ford
product.


Dieselclacker
__________________
Dieselclacker
dieselclacker is offline   Reply With Quote
Old 12-03-2008, 03:14 PM   #10
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,699
Although not directly addressing the original question, this horsepower calculator is informative to play around with and realize the effects of inclines, which may then be compared to acceleration rates. Just compare the HP requirement of a-say- 6% grade at 50mph to HP requirement to accelerate from 0 to 50mph.
__________________

__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Reply



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
ISC350, bucking under load/acceleration & speed limited Agent White Cummins Engines 7 12-03-2008 03:55 PM
A/C leaves the vents during acceleration TigeDuner Winnebago Industries Owner's Forum 3 03-25-2008 03:57 AM
acceleration pulsing on w22 lsukev Workhorse and Chevrolet Chassis Motorhome Forum 3 06-19-2007 05:00 PM
Acceleration with the Cummins 400...wow footdoc Newmar Owner's Forum 11 03-14-2007 04:37 PM
A/C and Fuel Economy MH-General Discussions & Problems 8 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.