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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-20-2008, 01:10 PM   #41 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
Quote:
Originally Posted by nascarnation View Post
Thanks for the info Jeepers.
Hopefully I have not derailed FastPlastics thread too far...
Glad we can help out a fellow Jeeper. It's Nice to see I'm not the only one with a Jeep on these forums. Sadly I've been busy the past couple of days so haven't had time to do any work on the Jeep. Plus haven't been driving enough for mileage readings. Man I wish I had a scan gauge . So it's nice to see the thread still moving.

__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-20-2008, 03:28 PM   #42 (permalink)
EcoModding Lurker
 
Join Date: Mar 2008
Location: Speedway, Indiana USA
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
To me the Jeep is like a sledge hammer.
Crude but effective and pretty unbreakable.

The aero sucks but it's not heavy for its size (1000 lbs less than a TrailBlazer). I really think with the right tuning it could do a lot better on mileage.
  Reply With Quote
Old 06-22-2008, 09:14 AM   #43 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
Ok for those of you following this thread. Recently I did some highway driving to my buddies wedding about 60miles away. Sadly I didn't have time to fill up right away after getting back in to town. So all I have is estimates on what I got for highway mileage.

I traveled 190.1miles on 9.496Gallons. 120 of those were highway. If you use my previous high of 16.44MPG in town you will get the following numbers.

70miles in town / 16.44 MPG = 4.258 gallons for highway
9.496gallons - 4.258 in town gallons = 5.238 gallons
120 highway miles / 5.238 gallons = 22.91MPG highway

If you use the last tank which for what ever reason was quite a bit lower 15.25MPG in town.

70miles in town / 15.25 = 4.590 gallons
9.496 gallons - 4.590 in town gallons = 4.906 gallons for highway
120 highway miles / 4.906 gallons = 24.46MPG highway
__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Old 06-22-2008, 03:30 PM   #44 (permalink)
Red
Master EcoModder
 
Red's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 713
Thanks: 1
Thanked 9 Times in 9 Posts
Kewl
  Reply With Quote
Old 07-10-2008, 05:41 PM   #45 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
The start of the underbody tray.

Ok so I had some time today to work on the Jeep. I decided to start working on the under body, hopefully to smooth the ruff under belly of the Jeeps. I'm following the input of many of you and starting at the front and working my way back. So far all I got done today was make the brackets to hold the panel on. But It's progress anyway. The panel is going to be about 12X38in and should push most of the air down under the front axle.

Any suggestions on what to make it out of? I have a good size sheet of steel but its hard to cut and weighs a lot. I was thinking about using a sheet of galvanized steel used for air ducts in houses. I know it's a little light weight but it's easy to work with and I think if I would roll the edges it would probably hold up pretty well.

Another question is should I wrap the sheet around the sides of the brackets? Or just the under side? Or should the panel angle as much as possible towards the wheel wells?
Attached Thumbnails
Click image for larger version

Name:	FrontUnderBodyTray1.jpg
Views:	936
Size:	73.8 KB
ID:	1127   Click image for larger version

Name:	FrontUnderBodyTray2.jpg
Views:	549
Size:	67.5 KB
ID:	1128   Click image for larger version

Name:	FrontUnderBodyTray3.jpg
Views:	597
Size:	55.6 KB
ID:	1129  
__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Old 07-10-2008, 05:46 PM   #46 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: Missouri
Posts: 28

Boy Blue - '93 Jeep Cherokee Country
90 day: 18.55 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Glad to see this after our own exchange. This'll be inspiration for sure

I was wondering about your airdam, if you plan to only have it within the bounds of the front wheels, or will it wrap to shield the front wheels at all?
__________________
Jeep: 25+ mpg or bust
  Reply With Quote
Old 07-10-2008, 11:58 PM   #47 (permalink)
Master EcoModder
 
gascort's Avatar
 
Join Date: Jun 2008
Location: Saint Louis, MO
Posts: 548

Gascort RIP - '93 Ford Escort Wagon
90 day: 43.01 mpg (US)

WifesCruze - '11 Chevrolet Cruze LT
90 day: 31.1 mpg (US)
Thanks: 14
Thanked 24 Times in 16 Posts
The brackets look good. I'm interested to see what your results are; you're starting with a pretty rough underbody!
I like your idea of the ductwork - metal (24 gauge I think). Would be pretty durable for your jeep stuff, but light and easy enough to work with. I quoted it out at local heating and air conditioning shops at ~1/square foot. Depending on how my coroplast holds up, it may get replaced with that stuff. As for right now, and during testing, I'm glad to be using free material with $10 in duct tape, $10 in screws/washers, and $10 in spray paint.
__________________
Gasoline, Wind, Solar, Gravity Hybrid-to-be! http://www.scientificmethodfueleconomy.blogspot.com/
  Reply With Quote
Old 07-11-2008, 01:00 AM   #48 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
Quote:
Originally Posted by DoctorP82 View Post
Glad to see this after our own exchange. This'll be inspiration for sure

I was wondering about your airdam, if you plan to only have it within the bounds of the front wheels, or will it wrap to shield the front wheels at all?
I think I'm going to keep it within the bounds of the front wheels. Making it kind of a light weight skid plate.
__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Old 07-11-2008, 03:43 PM   #49 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
Air Flow Patterns Before/After Skid Plate

Thanks to thirdman for finding the Flow Illustrator. I decided to give it a whirl using the under body of my Jeep and the new skid plate I'm working on. It's a very basic flow pattern (2D for starters) and not perfectly to scale or anything. But I think it gives the general idea anyway.

Let me know what you think and if I need to adjust anything.

__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Old 07-11-2008, 04:16 PM   #50 (permalink)
Red
Master EcoModder
 
Red's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 713
Thanks: 1
Thanked 9 Times in 9 Posts
Cool, I'd say see if you could extend it a bit more towards the bottom of the axle tube since it seems like you are still getting some flow over and above the axle

  Reply With Quote
Reply  Post New Thread


Tags
low pressure kills mpg's

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aeromods V1.0 trikkonceptz Aerodynamics 50 10-14-2011 12:30 PM
Glides like a Brick Wall (Jeep Cherokee, GMC Pick-up) DonEaston Aerodynamics 22 10-26-2008 05:17 PM
jeep aero mod ideas johnpr Aerodynamics 22 08-27-2008 08:45 PM
mpg + jeep - thinking cap help? tkmd EcoModding Central 6 04-28-2008 10:15 PM
Off-Road Test: '08 Jeep Grand Cherokee (Rally Race) RH77 The Lounge 4 02-25-2008 04:59 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com