Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-20-2016, 01:43 PM   #1 (permalink)
Should I turn here...?
 
Join Date: Jan 2014
Location: Port Angeles, WA
Posts: 53

Silver Civic - '96 Honda Civic CX
Thanks: 1
Thanked 17 Times in 6 Posts
Another Hopeless Case. Ram Van 3500.

Hey all. I haven't posted much on here for a long time, since I was trying to crack 50mpg with my pizza delivery Civic. I've hit 48, so I'm getting close.

But.

We bought a van. '02 Ram Van 3500 extended. Basically the biggest van we could find. And it gets 12 miles to the gallon. We're planning on using it for road trips and such, so any degree closer to 20mpg will be fantastic.

I finally got the interior set up mostly how we want it (fixing the rear heater/ac was a bear); so now I can work on fuel economy.

Currently I'm working on a giant air dam and side skirts. Other ideas welcome. It's got all the "bad" stuff: automatic, 4.10, the big V8, etc.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-20-2016, 02:29 PM   #2 (permalink)
Moderator
 
Vman455's Avatar
 
Join Date: Feb 2012
Location: Champaign, IL
Posts: 1,852

Pope Pious the Prius - '13 Toyota Prius Two
Team Toyota
SUV
90 day: 51.65 mpg (US)

Tycho the Truck - '91 Toyota Pickup DLX 4WD
90 day: 23.79 mpg (US)
Thanks: 197
Thanked 1,653 Times in 870 Posts
I would look to commercial trucks for inspiration--smooth wheel covers, the side skirts you mentioned, and perhaps some sort of folding tail like they use.
__________________



  Reply With Quote
The Following User Says Thank You to Vman455 For This Useful Post:
Joggernot (01-21-2016)
Old 01-20-2016, 03:50 PM   #3 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 4,150

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 42.9 mpg (US)
Thanks: 1,784
Thanked 1,919 Times in 1,246 Posts
You're rated 12 mpg combined. Jumping that pig up to 20 just isn't happening: I tried with an MT Xterra and only got 2-3 above combined.

A used axle with a better gear ratio can probably pay for itself, and figuring out a way to get that 46RE to lock up will probably be a good move. After that, keep the revs down and DWB, DWB, DWB. The main thing is actually reframing the way you think about it. Instead of seeing it as a low mpg failure compared to your Civic, ask what you're getting for your 12 (14? 15?) mpg. It's probably a lot. Sure, you want to improve mileage, but if you're getting the full utility out of it then it's a win.

PM me the last 8 of your VIN and I'll see what info I can dig up.
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
Old 01-20-2016, 05:08 PM   #4 (permalink)
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Cedar Rapids, IA
Posts: 1,766

The Karen-Mobile - '05 Dodge Magnum SXT
Team Dodge
90 day: 26.72 mpg (US)

Fiat Dakota - '00 Dodge Dakota SLT RWD Quad Cab
90 day: 16.67 mpg (US)

The Red Sled - '01 Dodge Durango SLT 4WD
90 day: 16.96 mpg (US)
Thanks: 799
Thanked 682 Times in 437 Posts
Quote:
Originally Posted by Fat Charlie View Post
A used axle with a better gear ratio can probably pay for itself, and figuring out a way to get that 46RE to lock up will probably be a good move. After that, keep the revs down and DWB, DWB, DWB. The main thing is actually reframing the way you think about it. Instead of seeing it as a low mpg failure compared to your Civic, ask what you're getting for your 12 (14? 15?) mpg. It's probably a lot. Sure, you want to improve mileage, but if you're getting the full utility out of it then it's a win.
x2 - Maybe you could find a taller rear end for your van? Belly pan?

One other thing you might want to do, is to affix plexiglass sheets to the rear of your van, so as to get rid of the gentle rounded edges in favor of something more like this (like Vman455 was mentioning):



The edges don't have to be quite as long as what's on that semi trailer above.
__________________
The Fiat Dakota


The Karen-mobile


The Red Sled
  Reply With Quote
Old 01-20-2016, 05:56 PM   #5 (permalink)
Should I turn here...?
 
Join Date: Jan 2014
Location: Port Angeles, WA
Posts: 53

Silver Civic - '96 Honda Civic CX
Thanks: 1
Thanked 17 Times in 6 Posts
Quote:
Originally Posted by Fat Charlie View Post
You're rated 12 mpg combined. Jumping that pig up to 20 just isn't happening: I tried with an MT Xterra and only got 2-3 above combined.

A used axle with a better gear ratio can probably pay for itself, and figuring out a way to get that 46RE to lock up will probably be a good move. After that, keep the revs down and DWB, DWB, DWB. The main thing is actually reframing the way you think about it. Instead of seeing it as a low mpg failure compared to your Civic, ask what you're getting for your 12 (14? 15?) mpg. It's probably a lot. Sure, you want to improve mileage, but if you're getting the full utility out of it then it's a win.

PM me the last 8 of your VIN and I'll see what info I can dig up.
Yeah, the point of the van is to haul massive amounts of cargo (one of its intended uses is to facilitate a move), so I don't expect it to get 20mpg. I'm just looking to save a few bucks over doing nothing.

I got the airdam on yesterday, I'll post pictures soon.
  Reply With Quote
Old 01-20-2016, 09:03 PM   #6 (permalink)
Master EcoModder
 
Join Date: Sep 2012
Location: Motor City
Posts: 261
Thanks: 0
Thanked 192 Times in 123 Posts
My 2001 full size GMC van with a 5.0 V8 could pull down 20 MPG on the highway, if I kept the speed to 60 MPH. More like 17 at 70 MPH. That's pure highway though.

That said....
BOATTAIL!

Last edited by ennored; 01-20-2016 at 09:28 PM..
  Reply With Quote
Old 01-21-2016, 12:18 PM   #7 (permalink)
Should I turn here...?
 
Join Date: Jan 2014
Location: Port Angeles, WA
Posts: 53

Silver Civic - '96 Honda Civic CX
Thanks: 1
Thanked 17 Times in 6 Posts
I got this put on the other day. I'm also going to do matching side skirts and then paint them flat black.

Should I do skirts behind the back wheels as well? Also, will the perforations make a material difference?

Quote:
Originally Posted by ennored
My 2001 full size GMC van with a 5.0 V8 could pull down 20 MPG on the highway, if I kept the speed to 60 MPH. More like 17 at 70 MPH. That's pure highway though.

That said....
BOATTAIL!
I MAY be able to boattail it eventually, but all the mods I do have to pass the wife's aesthetic approval. Maybe I can fabricate a boattail that will double nicely as a small camping awning, and convince her that way...
Attached Thumbnails
Click image for larger version

Name:	IMG_20160120_152613881.jpg
Views:	259
Size:	144.5 KB
ID:	19503   Click image for larger version

Name:	IMG_20160120_152637696.jpg
Views:	199
Size:	138.5 KB
ID:	19504  
  Reply With Quote
The Following 2 Users Say Thank You to 96CX For This Useful Post:
mazdamx640 (01-29-2016), wdb (02-01-2016)
Old 01-21-2016, 01:10 PM   #8 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2012
Location: Utah
Posts: 118
Thanks: 1
Thanked 33 Times in 24 Posts
I am reminded of the old Xplorer campers. I don't know if those aeromods amounted to any measurable increase in highway mileage, but they sure looked cool -- kind of.
  Reply With Quote
Old 01-21-2016, 04:16 PM   #9 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 13,020
Thanks: 20,857
Thanked 6,362 Times in 3,950 Posts
airdam

Ahmed Feysal did a Master's Thesis doing CFD on a Dodge pickup.
His research showed a drag increase when the airdam had between 6"and 3"ground clearance.At 3"clearance (for racing only!) he got a 1% drag reduction,which would be hard to see at the gas pump.
If the van behaves like the pickup,you may see an mpg penalty.
CAR and DRIVER modded a Ram Van in he 1970's.If I remember correctly,the only thing which helped them was a mirror delete.
Mirrors from a Tesla S would show an MPG increase.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 01-21-2016, 10:46 PM   #10 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Tampa, FL
Posts: 1,652

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 190
Thanked 387 Times in 279 Posts
Im from a big family, so growing up we had the same van but a '93 model. Definitley look at semi's for inspiration as already suggested. Maybe creating your own peices around the top and sides to give a sharp break for the air to detach, much like the rear of a prius. I would also completely cover those rear wheels, they ride inboard of the body quite a bit if memory serves me.

__________________




  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com