Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-14-2013, 05:43 PM   #111 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
Quote:
Originally Posted by fcporto View Post
Due to recent activity in this thread, I am re-posting my previous graph with some changes, namely:

1- new graph type, that takes into account the amount of Km made in each test run (and a rather colorful one...)
2- new data from recent runs
3- values are corrected for the computer average error (6.1%)

Mercedes C200 CDI (diesel), estate, manual gearbox
Did you try seeing if your numbers possibly yielded a higher correlation coefficient (R^2) using the "constant product" relationship formula, ie:

K = MPG × MPH ...and, thus, MPG = K / MPH

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-15-2013, 12:31 PM   #112 (permalink)
EcoModding Apprentice
 
Blue Angel's Avatar
 
Join Date: Feb 2013
Location: Ottawa, ON, Canada
Posts: 180

Cruze Eco MT - '12 Chevrolet Cruze Eco MT
Team Chevy
90 day: 44.29 mpg (US)
Thanks: 15
Thanked 58 Times in 37 Posts
Quote:
Originally Posted by PaleMelanesian
What rpm do you run at 60 mph? I'm at 2800.
Quote:
Originally Posted by Blue Angel
...If I remember right, it's reving almost right at 1500 @ 50 MPH, so at 60 it would rev about 1800 or so. It's a .61 6th gear with a 3.83 final drive and a 26.3" tall tire (215/55-17).
I worked it out mathmatically. Using 795 revs/mile for that tire (Source=TireRack), at 60 MPH the engine is turning 1857 RPM. It may turn just a tad slower in reality as I have my tire pressures set high, about 49 psi cold on the fronts (may or may not make a difference in revs/mile).

Nice tall highway gearing, for sure, but I find I spend most of my time in 6th even around town. Part of my commute goes through a windy slow stretch along the Ottawa river that has a few gentle grades here and there. Traffic depending, as long as I'm able to keep my speed above 33 MPH (~53 km/h, ~1000 RPM) or so, this little 1.4T lugs the car up through that section with little complaint.

Drop the engine below 1000 RPM or so and torque drops off significantly. I get the feeling cam phasing angles change below 1k RPM to prioritize smooth idling over torque output. I don't think the turbo is contributing at all at those low engine speeds.

For such a heavy car with a small powerplant I can't complain.
__________________
2012 Cruze Eco 6MT
If it's slow, it might as well be efficient!

  Reply With Quote
Old 07-16-2013, 03:14 PM   #113 (permalink)
Master EcoModder
 
101Volts's Avatar
 
Join Date: Dec 2012
Location: Pennsylvania
Posts: 491

Grandpa's Caprice (retired) - '84 Chevrolet Caprice Classic
Last 3: 20.76 mpg (US)

Woody - '90 Mercury Grand Marquis Wagon LS
Last 3: 19.57 mpg (US)

F.E. Brick - '99 Chevrolet K2500 Suburban LS
Last 3: 12.94 mpg (US)

Mom's Car - '01 Chevrolet Impala Base
90 day: 21.95 mpg (US)

R.J. - '05 Ford Explorer 4wd
90 day: 19.52 mpg (US)
Thanks: 876
Thanked 33 Times in 27 Posts
FYI, The site I linked on Page 11 has details for cars that are even fifty years old. It doesn't have every car ever manufactured listed, But there's a lot of info there. Whether or not it's all quite accurate, Who knows. But it did help steer me away from purchasing a 1991-1996 Roadmaster Wagon.
  Reply With Quote
Old 07-16-2013, 03:32 PM   #114 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 310 Times in 186 Posts
For the VW Mk4 TDIs:



From MPG at MPH chart - TDIClub Forums
  Reply With Quote
Old 08-01-2013, 12:49 AM   #115 (permalink)
EcoModding Apprentice
 
Saskwatchian's Avatar
 
Join Date: Apr 2012
Location: Saskatchewan
Posts: 114

Eric's Explorer - '01 Ford Explorer Sport 4x4
90 day: 19.05 mpg (US)

E's V - '07 Nissan Versa SL
90 day: 33.11 mpg (US)
Thanks: 12
Thanked 25 Times in 18 Posts
more numbers for the Versa

Since my last graph I have gone a few more km, upped the tire pressure from 32 to 40, replaced the two rear tires to match the fronts, replaced the doughnut with a full sized spare + added bunch of other gear (probably net change +60 lbs)



Click image for larger version

Name:	speed graph 2.jpg
Views:	1197
Size:	99.2 KB
ID:	13528

Blue is before (99 points, 1543 km total)
Red is after (81 points, 1884 km total)

In a way it is too bad I did so many changes at one time so it's hard to say what had what affect but the car handles a bit better now and I have much better piece of mind driving in remote areas while any change in milage appears to be a wash.

Oh and I did some more controlled tests on AC on -vs- AC off and it appears to affect my consumption by about 0.2 L/100km @ 100km/h. At $1.40/L I will gladly pay the 14¢/hour it takes to keep me cool and comfortable with the AC on in the summer.


EDIT: does anyone know why my my graph is so small?

2nd EDIT: Thanks Metro
__________________

Last edited by Saskwatchian; 08-01-2013 at 09:12 PM..
  Reply With Quote
The Following User Says Thank You to Saskwatchian For This Useful Post:
oldtamiyaphile (06-04-2014)
Old 08-01-2013, 11:23 AM   #116 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,771

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 66.29 mpg (US)
Thanks: 3,484
Thanked 6,282 Times in 3,251 Posts
Fixed the graph
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



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 08-19-2013, 02:45 PM   #117 (permalink)
Mechanical engineer
 
Vekke's Avatar
 
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,016

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 23.59 mpg (US)
Thanks: 199
Thanked 531 Times in 238 Posts
Measured fuel consumption data from Finnish car magazine called Tekniikan Maailma aka TM.

There are measured fuel consumption data at speeds from 60,80,100 and 120 km/h.

Work is not mine, but should be accurate. They usually use flow meters in fuel lines in their tests. Test are done year around so some test are at winter conditions. they have regular test route which they use. Speed limits are higher on summer so they claim it will even out the difference of cold weather.

https://spreadsheets.google.com/spre...4WnZjSUE&gid=3

Might require google account to use.

If you press the buttons it will sort the list from best to worse.

Melu = Noise
Kulutus = fuel consumption
kulutus kaupunki = city fuel consumption
kiihtyvyys=acceleration
Rengaskoko=tire size
rengasmerkki=tyre mark
välitykset= gear ratios

For rest details you can use google translate .
__________________


https://www.linkedin.com/in/vesatiainen/

Vesa Tiainen innovation engineer and automotive enthusiast
  Reply With Quote
Old 10-23-2013, 11:43 AM   #118 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,771

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 66.29 mpg (US)
Thanks: 3,484
Thanked 6,282 Times in 3,251 Posts
Quote:
Originally Posted by MetroMPG View Post
Some data confirming the earlier chart for this car: a new U.S. owner is reporting 49.5 MPG (fill-up calculation) for a brand new 5-speed Mirage over a 400 mile trip with an almost 60 mph average speed, including a 10-20 mph crosswind on the return leg.

That was with tires set at 32 PSI and no other mods. A/C was off, presumably.

Test drove a 2014 DE manual transmission today - ordered one (U.S.) - Page 2
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



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
The Following User Says Thank You to MetroMPG For This Useful Post:
night9 (10-24-2013)
Old 06-04-2014, 04:01 PM   #119 (permalink)
Master EcoModder
 
basjoos's Avatar
 
Join Date: Dec 2007
Location: Upstate SC
Posts: 1,059

Aerocivic - '92 Honda Civic CX
Last 3: 70.54 mpg (US)

AerocivicLB - '92 Honda Civic CX
Team Honda
90 day: 55.14 mpg (US)

Camryglide - '20 Toyota Camry hybrid LE
90 day: 57.22 mpg (US)
Thanks: 6
Thanked 590 Times in 277 Posts
I finally got out and did a series of steady state speed vs. mpg runs in the Aerocivic. Finding a sufficiently level road was a search (this region is called the Piedmont for good reason), but I found a 6 mile stretch of highway that paralleled a railroad right of way that was very level and had only a 53 foot height variation along the 6 mile stretch. Elevation of test road was 700 feet above sea level
Air temperature at time of test 91 degrees F.
2 runs in each direction at each speed. Remained in lean burn at all speeds tested.

I don't have a graph generating program on my computer so I'll just list the numbers. If anybody wants to plug them into a graph, go ahead.

50 mph 95mpg
55mph 87mpg
65mph 77mpg
70mph 71mpg


Attached Thumbnails
Click image for larger version

Name:	aerocivicspeedvsmpg.jpg
Views:	937
Size:	26.8 KB
ID:	15127  
__________________
aerocivic.com
  Reply With Quote
The Following 7 Users Say Thank You to basjoos For This Useful Post:
2000neon (04-22-2015), BabyDiesel (03-23-2015), Daox (06-04-2014), Daschicken (04-13-2017), MetroMPG (06-04-2014), mikeyjd (06-05-2014), PaleMelanesian (06-05-2014)
Old 06-04-2014, 04:56 PM   #120 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,136

CM400E - '81 Honda CM400E
90 day: 51.49 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: 2,445
Thanked 2,495 Times in 1,507 Posts
That is incredibly impressive. Thanks for posting that info Basjoos.

__________________
Current project: A better alternator delete
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
The BSFC chart thread (post 'em if you got 'em) MetroMPG General Efficiency Discussion 298 04-09-2020 09:16 AM
EM Blog: GM engineers feel MPG gauges should be in all cars MetroMPG Instrumentation 2 10-24-2013 05:56 PM
2011 Ford Fiesta SFE (29 city / 40 hwy MPG US) Nels General Efficiency Discussion 68 11-29-2011 12:46 PM
Field Weakening Experiment for Speed Increase TomEV Fossil Fuel Free 12 04-10-2008 04:53 PM
EM Sticker contest #2: guess Mom's MPG! ('97 Camry 4-cyl auto) ends Sun., Feb. 3 MetroMPG Hypermiling / EcoDriver's Ed 33 02-04-2008 10:30 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