Minimum MPG - Kawasaki Versys Forum
 
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post #1 of 10 (permalink) Old 09-16-2012, 07:32 AM Thread Starter
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Talking Minimum MPG

Somewhere we had a discussion about minimum MPG, but I can't find that, so here's a new thread

So, I finally did the "minimum mpg on a V650" Autobahn run. In the interest of science, of corse! One warm summer evening, I was using the oppurtuinty of a 300 km Autobahn journey that I had to do anyways. Traffic was neglible.

My setup is a 2008 Versys running without a windshield (it was really hot during the day), a large top box, hand guards, and a high GPS mount. I'm a tall/slimish guy (1,90m/85kg) dressed in textile with a flappy high-visibility-vest over it. Not optimal to achieve the highest possible top speed, but we're interested in low MPG, so full throttle = full throttle. My versys is equipped with a speedohealer and GPS, and I know that the speed reading in stock is too high and distance traveled as shown by the versys is mostly accurate, which I accounted for to obtain in the following numbers I also verified the distance using google maps.

Tires were BT023 with 2 mm or so remaining (1.6mm being the legal minimum in Germany), so I had to replace them later anyways (going fast kills rear tires).

So, at first, I did my regular cruising speed of 150 km/h for 200 km between two Autobahn pump stations, resulting in an average consumption of 6.21 l/100 km, that's 37.88 mpg at 93.2 mph over 124 miles for our non-metric friends

The next pump station was 71 km (44.1 miles) away, so I went "full throttle" until there. There was only a short construction site with speed limit and a minimum of slower traffic on the way. My top speed was only around 180 km/h (112 mph) due to the lack of a windshield. I've seen 195 kph (121mph) on the tacho before with a windshield (and 211 kph=131 mph without speedohealer).

Thus, 6.17 litres for 71 km equals 8.69 l per 100 km.
Or, in "imperial" units as converted by google, 27.1 mpg.

That's a 45% higher fuel consumption at 180 than at 150, which is a 20% higher speed. Which is almost quadratic as a scientist would expect: 1.2^2=1.44.

In other words, I wasted 1,76 liters of fuel = 3 euro = $3.93 to save 4 minutes and 44 seconds.

--
In general, going that fast is not worth it. The faster you go, the less time you save by going even faster.
And not only does it waste fuel, it also eats up rubber, especially the rear tire.
It's uncomfortable as hell - don't even think about doing this without hearing protection.
The traffic ahead of you has no chance to correctly estimate your speed, especially at night.
So this was a one-off show for me, other instances of high speed were only for a few minutes for the thrill of it, or the get rid of annoying vehicles.

btw, the current fuel price in Germany is 1.709 Euro per litre, so somewhat around $5.92 per gallon (cheapest gas, 10% Ethanol 95 Octane).

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post #2 of 10 (permalink) Old 09-16-2012, 09:21 AM
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Good info... thanks!

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post #3 of 10 (permalink) Old 09-16-2012, 06:25 PM
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Now that is interesting. Gotta say that 27 MPG is damn good for full throttle fun. That will make me feel better the next time I am having some fun at 3am coming home from work.
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post #4 of 10 (permalink) Old 09-17-2012, 10:52 AM
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And here I am all disappointed when I get 45 mpg...

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post #5 of 10 (permalink) Old 09-17-2012, 06:41 PM
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Just watched the NHRA Nationals at Indy. Commentator said that Top Fuellers and Funnies go thru 10 gallons of nitro, EACH complete run, including the burn-out.

Buddies who flew the F101 VooDoo told me that the "fuel-dump" procedure was to 'go around the horn' with the throttle to afterburner without lighting them. Apparently that p*ssed fuel out like it was going out of style!


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post #6 of 10 (permalink) Old 09-17-2012, 06:59 PM
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Quote:
Originally Posted by fasteddiecopeman View Post
Just watched the NHRA Nationals at Indy. Commentator said that Top Fuellers and Funnies go thru 10 gallons of nitro, EACH complete run, including the burn-out.

Buddies who flew the F101 VooDoo told me that the "fuel-dump" procedure was to 'go around the horn' with the throttle to afterburner without lighting them. Apparently that p*ssed fuel out like it was going out of style!

I once talked to a guy who flew a MiG-21 out of Reno, after he took off you could still hear him until he was well out of sight, at which point the sound just disappeared (When he came out of burner I'd assume).

He returned about 20 minutes later. I asked him how much fuel he had used on such a short flight.

"All of it." He said.
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post #7 of 10 (permalink) Old 09-18-2012, 04:38 AM Thread Starter
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Glad you like it

And here's a pic of the setup:

2008 Kawasaki Versys
1994 Honda NTV 650
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post #8 of 10 (permalink) Old 09-18-2012, 05:03 AM
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Interesting stats. I did 30 miles yesterday at the pace and then 43 miles Balls out on the crooked roads. Top speed 101mph, average moving 56 mph. MPG 46

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post #9 of 10 (permalink) Old 09-18-2012, 02:04 PM
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85 mph average across I-90 in S Dakota. Bitchin' head wind while fully loaded with lugage.

MPG = 26
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post #10 of 10 (permalink) Old 09-18-2012, 06:30 PM
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Just "topped-up" after 201.5 kms, and used 7.53L, mostly around town stuff. Works out to 75+mpgImperial, 60 mpgUS.

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