EcoModder Forum Equivalent MPG of cycling - garage feature?

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Equivalent MPG of cycling - garage feature?

The plan from the start has been to add a Garage feature for cyclists. There are 2 approaches we could take (or both, I guess)
• A simple comparison, showing the proportion of biking vs. driving
• Peakster suggested factoring bike (or any hpv) distance travelled in a way that gives "combined" MPG with your car(s). EG. if you got 40 MPG last month in your car, and covered 100 miles, but you also rode 100 miles commuting by bike, your total transportation FE for the month is 80 MPG.
• Another approach is if your bike computer calculates/estimates energy output, you could just do the math and figure out equivalent FE like I did with the ForkenSwift "MPGe".

Quote:
 I was trying to figure how to come up with a MPG equivalent for the bike, like you did for the ForkenSwift. I have a power meter that gives me the following data: kJ ave watts time distance miles Ave speed
The MPGe formula would simply be distance (mi) / gallons equivalent.

Here's a conversion site that will give you the US gallon equivalent of gasoline in kJ (and lots of other conversions): http://www.onlineconversion.com/energy.htm

1 kilojoule = 0.000,007,589,6 gallon [U.S.] of automotive gasoline

So if you rode 100 miles and the computer said you used 11,300 kJ then your MPGe is...

100 miles/ (11,300 kJ * 0.000,007,589,6 kJ/gal)

or 100 miles / 0.08576248 GALe

= 1166 MPGe

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 12-13-2007, 04:30 PM #2 (permalink) Batman Junior     Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,451 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: 67.41 mpg (US) Thanks: 3,983 Thanked 6,874 Times in 3,565 Posts PS - anybody want to check my math? Also, I just kind of picked the kJ figure for going 100 mi. out of a hat, based on one reference I saw after a quick google. It could be wrong. __________________ 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
 12-13-2007, 04:44 PM #3 (permalink) Dartmouth 2010     Join Date: Nov 2007 Location: Hanover, NH Posts: 6,447 Vegan Powa! - '91 Honda CRX DX Team Honda 90 day: 66.52 mpg (US) Thanks: 92 Thanked 122 Times in 90 Posts How many people actually have meters that calculate wattage though? Powertap! __________________ EcoModder's best: Donate to EM | Window clings | EM Shirts | Better Gas Mileage | MPG Tracking More fun sites: Green Home Improvement | crxMPG | Benjamin FT Jones | Vegan Recipes | Car-free Living
 12-13-2007, 04:45 PM #4 (permalink) Batman Junior     Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,451 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: 67.41 mpg (US) Thanks: 3,983 Thanked 6,874 Times in 3,565 Posts And how accurate can they be? What do they measure - heart rate? Body temp? __________________ 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
 12-13-2007, 04:48 PM #5 (permalink) ECO-Evolution     Join Date: Nov 2007 Location: Central Texas Posts: 1,482 Iron Horse (retired) - '97 Iron horse Intrepid Ninja - '08 Kawasaki 250R 90 day: 76.23 mpg (US) Thanks: 17 Thanked 44 Times in 33 Posts Very nice. I don't know how many will have the computers that will figure kJ so it would probably just be best to use some form of the combine FE. I'm trying to picture how that would work. I guess you would have another column in the garage that has transportation index? Would it be on the rolling 90 day average also? __________________ "Judge a person by their questions rather than their answers."
 12-13-2007, 04:53 PM #6 (permalink) Batman Junior     Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,451 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: 67.41 mpg (US) Thanks: 3,983 Thanked 6,874 Times in 3,565 Posts I like the combined FE idea too. I figured it would just be for the year. That would be easiest, to start. It makes for another cool top 10 list, plus it would show in your individual garage. __________________ 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
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Quote:
 Originally Posted by MetroMPG And how accurate can they be? What do they measure - heart rate? Body temp?
Some are pretty accurate. Here's the poop.
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 12-13-2007, 05:06 PM #8 (permalink) Dartmouth 2010     Join Date: Nov 2007 Location: Hanover, NH Posts: 6,447 Vegan Powa! - '91 Honda CRX DX Team Honda 90 day: 66.52 mpg (US) Thanks: 92 Thanked 122 Times in 90 Posts Powertap actually calculates energy output, that's why they cost 1000 USD and not many people have them, __________________ EcoModder's best: Donate to EM | Window clings | EM Shirts | Better Gas Mileage | MPG Tracking More fun sites: Green Home Improvement | crxMPG | Benjamin FT Jones | Vegan Recipes | Car-free Living
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Quote:
 Originally Posted by SVOboy How many people actually have meters that calculate wattage though? Powertap!
Thats what I was thinking too. I would like to have a month by month bike mileage chart like this:

http://www.bike-pgh.org/resources/submit-your-miles

Route slip has a nice graph based on week to week mileage (it also shows the amount of climbing too, based off of google maps):

If you want to put a more environmental spin on the graph. You could say total mileage by bicycle X,XXXmiles = XX.X gallons saved = X,XXX lbs of CO2 saved.

Last edited by igo; 12-13-2007 at 05:59 PM..

 12-13-2007, 05:54 PM #10 (permalink) Batman Junior     Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,451 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: 67.41 mpg (US) Thanks: 3,983 Thanked 6,874 Times in 3,565 Posts It's easy to forget how intense cyclists can be until you read something like that. Then again, I'm sure they'd say the same thing about FE nuts after seeing someone who posted a inverview with the inventor of the ScanGauge. __________________ 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