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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-15-2011, 01:56 PM   #31 (permalink)
Master EcoModder
 
slowmover's Avatar
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,407

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,368
Thanked 706 Times in 534 Posts
I'm keeping your work as reference for my truck. Might you be so kind as to give truck-to-ground dimensions, as in body height (FF & RR), axle height, etc? A sort of ballpark ground belly-pan height might also be useful. I imagine mine sits higher -- even as a 2WD.

__________________
2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-15-2011, 04:14 PM   #32 (permalink)
EcoModding Apprentice
 
graydonengineering's Avatar
 
Join Date: Jul 2011
Location: Tucson, AZ
Posts: 147

Frontier 2wd 2.4L 5 speed - '98 Nissan Frontier XE
90 day: 27.87 mpg (US)
Thanks: 34
Thanked 53 Times in 27 Posts
Quote:
Originally Posted by slowmover View Post
I'm keeping your work as reference for my truck. Might you be so kind as to give truck-to-ground dimensions, as in body height (FF & RR), axle height, etc? A sort of ballpark ground belly-pan height might also be useful. I imagine mine sits higher -- even as a 2WD.
Sure thing, I will take some measurments later on and post them. Bear in mind, this is a 2wd that has been lowered about 2" front and rear and as a result, if your truck has not been lowered, the slope to go from center belly to the underside of the differential will be more pronounced. With 2" lowering blocks to stuff the rear axle futher into the body work, the slope was quite minimal. I lowered the truck for improved handling (faster corner coasing) and reduced drag. I messed around with low profile bump stops for a while and finally just removed the stops all together to get suspension travel that is just shy of stock configuration travel.

I belive I am reeping the benefits of the lower stance much more now with the belly pan in place.
__________________
-Miles

Best 15-mile commute city/highway mix: 37.7 mpg
Best tank so far: 31 mpg

Last edited by graydonengineering; 08-22-2011 at 03:23 PM..
  Reply With Quote
The Following 2 Users Say Thank You to graydonengineering For This Useful Post:
aerohead (08-17-2011), slowmover (08-17-2011)
Old 08-22-2011, 03:54 PM   #33 (permalink)
EcoModding Apprentice
 
graydonengineering's Avatar
 
Join Date: Jul 2011
Location: Tucson, AZ
Posts: 147

Frontier 2wd 2.4L 5 speed - '98 Nissan Frontier XE
90 day: 27.87 mpg (US)
Thanks: 34
Thanked 53 Times in 27 Posts
Just a little update, I have not had time to do any major work lately and ran out of chloroplast again but I did delete the wipers over the weekend. I rain-xed the glass which should be good enough for a sprinkle. I scratched a reference line on the wiper and stud so I can put it on in the right position the first try and threw it under the seat for a rainy day. Now if I could just make a cover for the wiper arms indents in the cowl cover it would be about as good as it could get.

After much debate with myself (I'm not talking to myself, I'm on my bluetooth I swear!) I could not settle on any tape or weather stripping I would be willing to use on my paint. I ordered some bulk black vinyl made for outdoor use which I will use for covering the big gap between the bed and the cab and also use it for some lower grill blocking. I could also use a strip on either side of the windshield to smooth the weather stripping transition that is currently about 1/4" x 90 degrees. I can cut it out in any shape I want so I can hopefully make it look more factory that way.

My MPG has been very solid at over 30. As far as I can guess, I am averaging about 31.5 mpg on my current tank! That is certainly better than I could have done before the belly pan and on track to be a new record. I am now getting about 100 more miles per tank than I used to. Yay for mods!
__________________
-Miles

Best 15-mile commute city/highway mix: 37.7 mpg
Best tank so far: 31 mpg
  Reply With Quote
The Following User Says Thank You to graydonengineering For This Useful Post:
BamZipPow (08-22-2011)
Old 09-04-2011, 03:52 PM   #34 (permalink)
EcoModding Apprentice
 
Join Date: Jul 2010
Location: Tucson, AZ
Posts: 245
Thanks: 111
Thanked 156 Times in 63 Posts
Quote:
Originally Posted by graydonengineering View Post
Just a little update, I have not had time to do any major work lately and ran out of chloroplast again but I did delete the wipers over the weekend. I rain-xed the glass which should be good enough for a sprinkle. I scratched a reference line on the wiper and stud so I can put it on in the right position the first try and threw it under the seat for a rainy day. Now if I could just make a cover for the wiper arms indents in the cowl cover it would be about as good as it could get.

After much debate with myself (I'm not talking to myself, I'm on my bluetooth I swear!) I could not settle on any tape or weather stripping I would be willing to use on my paint. I ordered some bulk black vinyl made for outdoor use which I will use for covering the big gap between the bed and the cab and also use it for some lower grill blocking. I could also use a strip on either side of the windshield to smooth the weather stripping transition that is currently about 1/4" x 90 degrees. I can cut it out in any shape I want so I can hopefully make it look more factory that way.

My MPG has been very solid at over 30. As far as I can guess, I am averaging about 31.5 mpg on my current tank! That is certainly better than I could have done before the belly pan and on track to be a new record. I am now getting about 100 more miles per tank than I used to. Yay for mods!
Nice work on the belly pans graydone. I fabbed pans for the entire length of my 25 foot RV and have not seen an increase yet, but I suspect I've got the frontal air restricted too much creating a bigger bow wave maybe. Nice job on covering the differential with the floating coroplast, I'm going to try something similar with the RV. After seeing your photos for boxing off the wheel wells I like that idea and will try that as well.

Since I've got dual rear wheels I'm hoping that fairings on the duallies and up front, along with the rest will show some gains for these mods. I'm going to wait a while for those mods, though, I also live in Tucson and I'm tired of working in this heat.

I have a thought for you. Now that you're seeing good results from this, have you thought about a boat tail? The boat tail on my RV resulted in an average gain so far of 25% +. I'm guessing this vehicle was so horrible aerodynamically you might not see gains that high with the Frontier, but I bet it would be worth your while.

If you added a receiver type hitch, you could build the tail so it mounts via the hitch receiver, so you could remove it easily and quickly. To be the most effective, you'd probably need to add a cab-high shell to your truck, but those are pretty inexpensive. Anyway, just a thought. Keep up the good work.
  Reply With Quote
Old 09-04-2011, 10:08 PM   #35 (permalink)
EcoModding Apprentice
 
graydonengineering's Avatar
 
Join Date: Jul 2011
Location: Tucson, AZ
Posts: 147

Frontier 2wd 2.4L 5 speed - '98 Nissan Frontier XE
90 day: 27.87 mpg (US)
Thanks: 34
Thanked 53 Times in 27 Posts
Quote:
Originally Posted by orbywan View Post
Nice work on the belly pans graydone. I fabbed pans for the entire length of my 25 foot RV and have not seen an increase yet, but I suspect I've got the frontal air restricted too much creating a bigger bow wave maybe. Nice job on covering the differential with the floating coroplast, I'm going to try something similar with the RV. After seeing your photos for boxing off the wheel wells I like that idea and will try that as well.

Since I've got dual rear wheels I'm hoping that fairings on the duallies and up front, along with the rest will show some gains for these mods. I'm going to wait a while for those mods, though, I also live in Tucson and I'm tired of working in this heat.

I have a thought for you. Now that you're seeing good results from this, have you thought about a boat tail? The boat tail on my RV resulted in an average gain so far of 25% +. I'm guessing this vehicle was so horrible aerodynamically you might not see gains that high with the Frontier, but I bet it would be worth your while.

If you added a receiver type hitch, you could build the tail so it mounts via the hitch receiver, so you could remove it easily and quickly. To be the most effective, you'd probably need to add a cab-high shell to your truck, but those are pretty inexpensive. Anyway, just a thought. Keep up the good work.
Thanks for your compliments! I too am sick of the heat and I am putting off major mod work for now. At least till the highs are well bellow 100. I do have a cap on the truck now that is very smooth and the same height as the cab with windowless sides. I have considered adding a boat tail, maybe a simple one. Maybe something that would work with an open tail gate and open canopy. Right now, I still have more work on my belly dam and some rear wheel skirts. After all that, I will have to see how it goes.

What part of Tucson do you live? I am on the far east in Rita Ranch. If you want to check the truck out in person some time, send me a pm. I work near the airport.
__________________
-Miles

Best 15-mile commute city/highway mix: 37.7 mpg
Best tank so far: 31 mpg
  Reply With Quote
Old 09-06-2011, 09:27 PM   #36 (permalink)
EcoModding Apprentice
 
Join Date: Jul 2010
Location: Tucson, AZ
Posts: 245
Thanks: 111
Thanked 156 Times in 63 Posts
Quote:
Originally Posted by graydonengineering View Post
Thanks for your compliments! I too am sick of the heat and I am putting off major mod work for now. At least till the highs are well bellow 100. I do have a cap on the truck now that is very smooth and the same height as the cab with windowless sides. I have considered adding a boat tail, maybe a simple one. Maybe something that would work with an open tail gate and open canopy. Right now, I still have more work on my belly dam and some rear wheel skirts. After all that, I will have to see how it goes.

What part of Tucson do you live? I am on the far east in Rita Ranch. If you want to check the truck out in person some time, send me a pm. I work near the airport.
I'm on the west side around Grant and Oracle. When it cools off I'll send you a PM and maybe we can get together and compare notes. Thanks.
  Reply With Quote
Old 09-12-2011, 09:26 AM   #37 (permalink)
EcoModding Apprentice
 
HighMPG's Avatar
 
Join Date: Sep 2011
Location: California
Posts: 145

Super Duty - '12 Ford F250 Super Duty XLT Long Bed Super-Cab
90 day: 15.29 mpg (US)
Thanks: 22
Thanked 7 Times in 6 Posts
Nice!
__________________

Good Bye Insight Hello 6.7 Diesel Truck!
**My First Hybrid Insight**
  Reply With Quote
Old 04-16-2013, 01:18 AM   #38 (permalink)
EcoModding Lurker
 
Join Date: Mar 2013
Location: North Alabama
Posts: 23

Old Blue - '99 Nissan Frontier XE
90 day: 27.39 mpg (US)

Sube2 - '12 Subaru Legacy
90 day: 25.56 mpg (US)
Thanks: 4
Thanked 5 Times in 3 Posts
This thread may be dead, but I thought I'd give it a try.....
I'm very interested in this because I have a '99 Frontier. I noticed on the first page that the front wheel well fender was blocked off. Isn't that where the air intake is routed to (drivers side)? Is that a problem or have you modified the intake?
  Reply With Quote
Old 04-16-2013, 05:28 PM   #39 (permalink)
Master EcoModder
 
slowmover's Avatar
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,407

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,368
Thanked 706 Times in 534 Posts
Yeah, the OP hasn't posted in a year. Plenty of good posts/threads and hope he'll contribute again.

__________________
2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
  Reply With Quote
Reply  Post New Thread


Thread Tools




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