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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-30-2008, 01:25 PM   #11 (permalink)
Master EcoModder
 
Join Date: May 2008
Location: Auburn, NH
Posts: 451

Wicked Wanda - '99 VW Beetle GLS
90 day: 29.59 mpg (US)

Green Monster - '99 Ford Explorer Sport
90 day: 16.73 mpg (US)

Dad's Taxi - '99 Honda Odyssey EX
90 day: 24.23 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
My next move would be an attempt at extending (lowering) the front air dam. Push the air around the sides instead of under. I googled by butt off trying to find an aftermarket air dam for the Cherokee and got nowhere. Years ago J.C.Whiteny used to sell universal front spoilers, but no longer.

An alternative would be to lower the whole vehicle.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-30-2008, 01:58 PM   #12 (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 DifferentPointofView View Post
Sweet Block I did something similar with clear plastic, but plexi works good too.

Is it just me or does the ZJ have the only good cooling system? I've never seen the needle get to the 210 degree mark. It usually hangs around between 180-190.

One thing that gets annoying is when you take it to autozone or something to get something and the guys ask why theres plastic over your grille. Then you say to heat the engine faster (less time in open loop) and create less drag. Then they ask whether or not you need a new thermostat and if yours is faulty OH!:

Maybe try using plexy over the headlight slots, they seem to be mini-parachutes Removed the roof racks yet? (if there is any)
So far with just the three blocks the temp has been rock solid at 190. Can't say I've heard the electric fan kick in either.

Covering the headlight slots isn't a bad idea. Just not sure how I would do it and make it look nice. I'm all about stealthy aero mods.

It does have the small stock roof rack. Which I have thought about taking off. But I don't really have a place to put it when it's off. I'd like to keep it for when I sell it eventually. If I leave it on is there an optimal location for the cross beams? Is there a low pressure zone towards the middle because of the flat roof?
__________________

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 05-30-2008, 02:03 PM   #13 (permalink)
EcoModding Apprentice
 
TheDon's Avatar
 
Join Date: Feb 2008
Location: Davenport,FL
Posts: 214

Pepper - '87 Mercedes Benz 300D
90 day: 30.42 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
I like the plexi glass idea. It would pop into my grill with no mods to the grill chrome. Where to buy a good sheet of it? I presume its of thin kind
  Reply With Quote
Old 05-30-2008, 02:27 PM   #14 (permalink)
EcoModding Lurker
 
adrive7's Avatar
 
Join Date: May 2008
Location: DC Metro
Posts: 48

Ranger - '08 Ford Ranger XL
90 day: 20.73 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to adrive7
Quote:
Originally Posted by FastPlastic View Post
It does have the small stock roof rack. Which I have thought about taking off. But I don't really have a place to put it when it's off. I'd like to keep it for when I sell it eventually. If I leave it on is there an optimal location for the cross beams? Is there a low pressure zone towards the middle because of the flat roof?
If you don't want to take it off, you could cover it with plastic to smooth out the airflow over it.
__________________
Ohio State Baja SAE
  Reply With Quote
Old 05-30-2008, 02:30 PM   #15 (permalink)
EcoModding Lurker
 
jeremy128's Avatar
 
Join Date: May 2008
Location: Virginia
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
I wonder how much a kammback would help?
  Reply With Quote
Old 05-30-2008, 02:39 PM   #16 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 10,987

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,325
Thanked 2,385 Times in 1,445 Posts
Just a general note, but its usually best to start with the front of the vehicle and work your way back aerodynamically. On such a dirty underside, the air is probably already sped up quite a bit at that point which will negate the benefit of this mod. It is a good mod non-the-less, but just an FYI.
__________________
Current project: Adding regenerative braking to the Mirage
  Reply With Quote
Old 05-30-2008, 03:07 PM   #17 (permalink)
Master EcoModder
 
Join Date: May 2008
Location: Auburn, NH
Posts: 451

Wicked Wanda - '99 VW Beetle GLS
90 day: 29.59 mpg (US)

Green Monster - '99 Ford Explorer Sport
90 day: 16.73 mpg (US)

Dad's Taxi - '99 Honda Odyssey EX
90 day: 24.23 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by FastPlastic View Post
So far with just the three blocks the temp has been rock solid at 190. Can't say I've heard the electric fan kick in either.

Covering the headlight slots isn't a bad idea. Just not sure how I would do it and make it look nice. I'm all about stealthy aero mods.

It does have the small stock roof rack. Which I have thought about taking off. But I don't really have a place to put it when it's off. I'd like to keep it for when I sell it eventually. If I leave it on is there an optimal location for the cross beams? Is there a low pressure zone towards the middle because of the flat roof?
Can you remove just the cross beams?

Are the fender flares easily removable? Those babies stick out like big air scoops. The early Cherokees didn't have them.
__________________
  Reply With Quote
Old 05-30-2008, 03:18 PM   #18 (permalink)
Giant Moving Eco-Wall
 
DifferentPointofView's Avatar
 
Join Date: Dec 2007
Location: The Dale, IL (or A-Dale)
Posts: 1,120

The Jeep! - '95 Jeep Grand Cherokee ZJ Laredo
90 day: 23.75 mpg (US)

The Caliber - '07 Dodge Caliber R/T
90 day: 30.6 mpg (US)

The 'Scort - '98 Ford Escort LX
Thanks: 0
Thanked 7 Times in 6 Posts
Quote:
Can you remove just the cross beams?
If it's anything like the ZJ, then yes, you can remove the cross beams and leave the long ones (what are they called again?) on there. but that requires removing the whole rack, in which once you've done this, you might as well leave it all off.

I have mine in my brothers bedroom I've got a thread on doing some of this stuff, but the problem is it's all for zj's.

I know that the ZJ has a small lip that pushes air down towards the pavement. don't know how far it pushes it.

The problem with putting an air dam on one of these is there is no longer an approach angle, and you end up scraping up everything with it.

With lowering it, I don't know where you'd get a lowering kit for a Jeep, or what Jeep owner would have the heart to lower it. But if you can find a lowering kit, for the price of the springs/shocks etc. you might as well find and buy a geo or beater civic to roll around in. There'd be better returns anyway.

A belly pan wouldn't be such a bad Idea, I've thought about it a few times, it'd keep stuff from getting as badly gouged on a big rock, and I finally found a nearby (17 miles) sign shop I could buy coroplast from. Might just give it a try
__________________


Yea.. I drive a Jeep and I'm on a fuel economy site, but you just wouldn't understand... "It's a Jeep thing!" *Jeep Wave*

Did I Use Too Many Abbreviations? Here's The Abbreviations List
  Reply With Quote
Old 05-30-2008, 03:19 PM   #19 (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 TheDon View Post
I like the plexi glass idea. It would pop into my grill with no mods to the grill chrome. Where to buy a good sheet of it? I presume its of thin kind
I just used a piece from a broken picture frame. So it is pretty thin, which makes it easy to curve around bends. If you want to be lazy you could just pick up a picture frame from Wal-mart $10. Otherwise if you have a local hobby store (Hobby Lobby around here). I've seen the same size sheet for about $6. Another reason I choose to do it this way, be it harder because you have 5-7 slots to fill. I can always pop one or two out if I start having heat problems.
__________________

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 05-30-2008, 03:27 PM   #20 (permalink)
Giant Moving Eco-Wall
 
DifferentPointofView's Avatar
 
Join Date: Dec 2007
Location: The Dale, IL (or A-Dale)
Posts: 1,120

The Jeep! - '95 Jeep Grand Cherokee ZJ Laredo
90 day: 23.75 mpg (US)

The Caliber - '07 Dodge Caliber R/T
90 day: 30.6 mpg (US)

The 'Scort - '98 Ford Escort LX
Thanks: 0
Thanked 7 Times in 6 Posts
Do you have other pics of the XJ? I'd like to see what we're working with here.

__________________


Yea.. I drive a Jeep and I'm on a fuel economy site, but you just wouldn't understand... "It's a Jeep thing!" *Jeep Wave*

Did I Use Too Many Abbreviations? Here's The Abbreviations List
  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 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com