EcoModder Forum Speed vs. MPG charts (post 'em if you got 'em)

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Quote:
 Originally Posted by fcporto 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

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EcoModding Apprentice

Join Date: Feb 2013
Posts: 190

Previous Car - '12 Chevrolet Cruze Eco MT
Team Chevy
90 day: 44.29 mpg (US)

535d XDrive - '16 BMW 535d M-Sport
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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.
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 07-16-2013, 02:14 PM #113 (permalink) Master EcoModder     Join Date: Dec 2012 Location: Pennsylvania Posts: 502 Woody - '90 Mercury Grand Marquis Wagon LS Last 3: 19.57 mpg (US) Brick - '99 Chevrolet K2500 Suburban LS Last 3: 12.94 mpg (US) M. C. - '01 Chevrolet Impala Base 90 day: 18.92 mpg (US) R. J. - '05 Ford Explorer 4wd 90 day: 17.93 mpg (US) Thanks: 930 Thanked 34 Times in 28 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.
 07-16-2013, 02:32 PM #114 (permalink) NightKnight     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 GroupDiesel 90 day: 53.91 mpg (US) Olga - '03 Volkswagen Jetta Wagon 90 day: 46.24 mpg (US) Thanks: 303 Thanked 311 Times in 186 Posts For the VW Mk4 TDIs: From MPG at MPH chart - TDIClub Forums
 07-31-2013, 11:49 PM #115 (permalink) EcoModding Apprentice     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) 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 08:12 PM..
 The Following User Says Thank You to Saskwatchian For This Useful Post: oldtamiyaphile (06-04-2014)
 08-01-2013, 10:23 AM #116 (permalink) Batman Junior     Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,463 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 55.97 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car - '14 Mitsubishi Mirage ES (base) 90 day: 61.17 mpg (US) Thanks: 4,000 Thanked 6,898 Times in 3,578 Posts Fixed the graph __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my \$800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. 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
 08-19-2013, 01:45 PM #117 (permalink) Mechanical engineer     Join Date: Jan 2009 Location: Kitee (Finland) Posts: 1,190 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: 24.67 mpg (US) Thanks: 245 Thanked 746 Times in 353 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
Batman Junior

Join Date: Nov 2007
Posts: 22,463

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

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 61.17 mpg (US)
Thanks: 4,000
Thanked 6,898 Times in 3,578 Posts
Quote:
 Originally Posted by MetroMPG
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
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my \$800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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

 The Following User Says Thank You to MetroMPG For This Useful Post: night9 (10-24-2013)
 06-04-2014, 03:01 PM #119 (permalink) Master EcoModder     Join Date: Dec 2007 Location: Upstate SC Posts: 1,088 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: 62.77 mpg (US) Thanks: 16 Thanked 672 Times in 300 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   __________________ aerocivic.com
 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)
 06-04-2014, 03:56 PM #120 (permalink) Administrator     Join Date: Dec 2007 Location: Germantown, WI Posts: 11,184 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: 2,486 Thanked 2,560 Times in 1,540 Posts That is incredibly impressive. Thanks for posting that info Basjoos. __________________ Current project: A better alternator delete