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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-14-2008, 01:28 AM   #21 (permalink)
Master EcoModder
 
orange4boy's Avatar
 
Join Date: Aug 2008
Location: Canada
Posts: 1,209

The Golden Egg - '93 Toyota Previa DX
90 day: 31.91 mpg (US)

Chewie - '03 Toyota Prius
90 day: 57 mpg (US)

The Spaceship - '00 Honda Insight
Thanks: 81
Thanked 252 Times in 144 Posts
Off topic end.

Thanks. That's about what I get with my Previa 2.4L when warmed up. I would have loved to do those load tests before and after but I only got my mpguino lately.

__________________

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-14-2008, 10:02 PM   #22 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,375

Blackfly - '98 Geo Metro
Team Metro
90 day: 65.31 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 2,005
Thanked 4,723 Times in 2,364 Posts
Thanks for the input, guys. I imagine this is going to be a work in progress for a while.

I chipped away at the basics a little more this evening: you can now enter weight & A in either Metric or Imperial units. Added a few more explanations & links to the notes as well.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 12-19-2008, 12:44 PM   #23 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,375

Blackfly - '98 Geo Metro
Team Metro
90 day: 65.31 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 2,005
Thanked 4,723 Times in 2,364 Posts
I've made a new page "EcoModder tools". The aero/rr/power/mpg calculator is now linked there as well as a units conversion tool (for mpg --> L/100 km etc.)

You can access it via the "Tools" link in the navigation at the top of every page.

Expect the toolbox to grow & evolve to include more stuff.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 12-19-2008, 12:50 PM   #24 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 10,164

CM400E - '81 Honda CM400E
90 day: 39.62 mpg (US)

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

Daox's 04 Civic - '04 Honda Civic DX
90 day: 41.58 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)
Thanks: 1,660
Thanked 1,952 Times in 1,197 Posts
I likey. Now they just need icons/pics.
__________________
Current project: Heating the manual trans with engine coolant
  Reply With Quote
Old 12-19-2008, 01:08 PM   #25 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,375

Blackfly - '98 Geo Metro
Team Metro
90 day: 65.31 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 2,005
Thanked 4,723 Times in 2,364 Posts
Functionality first, then fancyness.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 12-19-2008, 07:46 PM   #26 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,275

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 153 Times in 108 Posts
If this spreadsheet is valid, I must be doing a bang-up job of improving my aerodynamics and improving engine efficiency by slowing down engine RPM.

Last summer I went to Nashville, TN and back. Slightly cool weather - roughly 70 degrees F. Out and back to same fuel pump so delta y = 0.

I had the full aero treatment: "fastback" bed fairing, air dam, and side skirts.

The trip was entirely an Interstate run and set the cruise on 1700 RPM (70 MPH).

Thev truck weighs 7000 lb. Figure Crr of 0.011 for worn 235-85x16 E-Rated tires pumped up to 100 psi Estimate frontal area at 41 sq. ft. 95% drivetrain efficiency for an overdrive manual. Summer No. 2 diesel.

I got a documented 28.1 MPG over that trip of 600 miles. Playing the variables to duplicate that performance says my Cd is 0.30 and my engine efficiency is 35%.

Am I that good? I figure a open-bed pickup to have a Cd of 0.45 and a diesel engine to have 33% efficency.
__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
Old 12-19-2008, 09:14 PM   #27 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,375

Blackfly - '98 Geo Metro
Team Metro
90 day: 65.31 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 2,005
Thanked 4,723 Times in 2,364 Posts
Quote:
Originally Posted by Concrete View Post
I'm up for anything as long as there is a field for a flat load fudge factor
GPH, like I used is probably not appropriate

watts or Horsepower is probably more acceptable
- what do you think?
Got your PM - haven't forgotten about this.

I'll work it in this weekend, probably as watts to start. (Can always do conversions to other units, if people want.)
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 12-19-2008, 11:44 PM   #28 (permalink)
Sequential
 
Concrete's Avatar
 
Join Date: Jun 2008
Location: Kansas
Posts: 177

The Truck - '00 Chevy S10 Extended Cab
90 day: 22.47 mpg (US)
Thanks: 0
Thanked 21 Times in 6 Posts
Darin,
Thanks
looking forward to it!


Big Dave,
from what you describe and some of Aeroheads data
I bet you are really doing that well

those are great results & it seems you are in the ball park on your numbers
of course it is hard to argue the particulars without a test facility
but even matching +/- a few percent in each entry is good work
__________________
Concrete
Start where you are - Use what you have - Do what you can.
  Reply With Quote
Old 12-20-2008, 09:33 AM   #29 (permalink)
Master EcoModder
 
Funny's Avatar
 
Join Date: Apr 2008
Location: Massachusetts
Posts: 408

Eco-Fit - '13 Honda Fit Base
90 day: 37.06 mpg (US)
Thanks: 29
Thanked 18 Times in 18 Posts
Perhaps you could also utilize this online tool for gear calculations and adjustments. That is for those of us who are interested in swapping transmissions and gears.

Gear Calculation Tool

I am so excited with all these numbers! God, I am such a nerd!
__________________
American by right
Ecomodder by choice
Hypermiler by necessity

  Reply With Quote
Old 12-20-2008, 01:43 PM   #30 (permalink)
EcoModding Apprentice
 
Join Date: Sep 2008
Location: Upstate NY
Posts: 190

GreenMile - '00 Mazda Protege ES
90 day: 34.45 mpg (US)
Thanks: 0
Thanked 5 Times in 3 Posts
I thought I should point you towards an existing spreadsheet that is the culmination of years of research (I believe it is someones PhD thesis) that is availible on the web.

Just search for Pamvec on google, it should turn up an excel file. It is extremely customizeable for many things that you have already included but also for things like: various drivetrains (hybrids, electric etc), driving models, can specify design goals, or just input known variants. When I used it to model my current car it nailed its MPG rating and I used it to model hypothetical cars.

__________________
http://benw385.vox.com/
'Blog' on the open source electric motorcycle project.

Please come visit and comment!
  Reply With Quote
The Following User Says Thank You to Blue Bomber Man For This Useful Post:
kennybobby (10-04-2012)
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
CdA list Daox Aerodynamics 152 03-18-2017 12:06 PM
Top 5 most fuel efficient tires (Lowest Rolling resistance: LRR) blackjackel General Efficiency Discussion 144 01-25-2016 11:39 PM
Calculating Rolling Resistance SVOboy EcoModding Central 2 02-15-2012 08:43 PM
Sources of Aerodynamic Drag in Automobiles and Possible Solutions SVOboy Aerodynamics 12 02-17-2010 02:09 PM



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com