Most Fuel Efficient Speed?

[Jiggles]

Anyone know what the most fuel efficient speed to drive at on the ninjette is? I was testing my car (2000 Nissan Maxima) and it's most fuel efficient speed is between 35-45. I'm guessing the ninja is close to that, maybe a little faster. Time to go find out!

[Alex]

How are you testing it?

[saxnbass]

As fast as you can while keeping the revs as low as you can... sooo.... 10mph in 6th gear?

[DaBlue1]

It depends. With a 15/42 sprocket set up, the bike will be at approx 6k @ 60 mph indicated (55 actual). 6k on a stock Ninja has an A/F Ratio of approx 14.7:1, which is where fuel is more efficiently burned while cruising.

My mpg take a hit at speeds over 65 mph.

[EthioKnight]

Just do the posted speed limit...
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[Jiggles]

Originally Posted by Alex

How are you testing it?

I'm planning on testing it with my 650 since it has a MPG feature. I did the same with my car using a Scan Gauge II

I figure that the most fuel efficient speed would be similar across both the 250 and 650.

[exarch]

Mpg, whats that? Mph is where its at, just dont wring your RPMs out as much(shift faster) to accelerate. at speeds of 35-45 your probably gunna stop and go, therefore consuming more fuel. On the other hand 65-70 will use higher RPMs, therefore consuming more fuel. Its a lose/lose situation my friend. If the bike gets an 'average' of x mpg, lets say 50. Compaired to a cars 'average' of 30mpg, then who cares about a 2-3mpg difference in either direction? The way you drive wont effect it a whole lot(unless your trying to drag, but thats a whole nother story) just drive normally and be happy, unless you plan on hypermilling or some other crazy stuff, that and stay away from trucks n SUVs

Peraonally I dont pick a veichle based on mpg, I pick based on how practicle(or fun) it is. Although I wont use my SUV as a work car, its there for the kids.
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[exarch]

Originally Posted by EthioKnight

Just do the posted speed limit...
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Yes, please do, I have bad roadrage vs slow drivers(unless its snowing or raining hard) especially slow people that drive in the left lane next to another slow driver and your trapt doing 15mph under the speed limit...
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[Alex]

Originally Posted by Jiggles

I'm planning on testing it with my 650 since it has a MPG feature. I did the same with my car using a Scan Gauge II

Makes sense. Big fan of the scan gauge gadget.

[Jiggles]

@exarch

[Jiggles]

Yea I love the scan guage, I wish the 250 had a OBD II port

[EsrTek]

Originally Posted by Jiggles

Anyone know what the most fuel efficient speed to drive at on the ninjette is?

42

[exarch]

Originally Posted by Jiggles

@exarch

I know im way off point, but I just have a hard time understanding what the big deal is about a couple of mpg? Is it really worth all that trouble? I mean hec, your mpg will never be exactly the same unless your in a controlled enviroment. You cannot control traffic and traffic lights no matter how hard you try(which in return will effect your results every time) thats why I dont see a couple of mpgs making a real difference. If we were talking about a constant 10+ mpg change I would be able to understand that.
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[Jiggles]

You are reading too much into this. I just wanted to know what the most aerodynamically fuel efficient speed is, that's all.

[Jiggles]

Originally Posted by EsrTek

42

This appears to be true. As shown here going 42 mph offers infinite mpg

[exarch]

I know, but im just saying ittl never be exactly the same, ever(my dad used to do the same thing), do you plan on changing your everyday commuting route once you find the most fuel efficient way? If not, is it just out of curiousity?
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[exarch]

Originally Posted by Jiggles

This appears to be true. As shown here going 42 mph offers infinite mpg

Does that factor in the wind/rain aswell maybe its 45mph for the best results on a nice day. That or maybe the safest speed is the most fuel efficient speed(doing 42 in the snow, or doing 42 in a sharp right isnt very safe) otherwise the repair bill will cost more.than the gas bill.
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[exarch]

http://answers.yahoo.com/question/in...2211114AA1Shfx
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[blink]

well supposedly its 90 km/h in a car, not sure about I bike. as slow as you can in 6th gear would be a good guess, but im not a researcher lol

[Jiggles]

Looks like it's also 35-45mph on a bike, however, I haven't tried tucking yet

Link to original page on YouTube.

[Liist]

I've always thought it was generally in the highest gear with the least amount of throttle required to keep the engine at the same speed.

[KawiKid860]

I admire the random 0-60 in an mpg video. Dang why does the 650 have to be so much quicker to 60 than my 500

[Jiggles]

Haha well I had been doing 0-60 runs all day the previous day on my 250, had to give the 650 some lovin' too. And that isn't the fastest I'll be able to get it. I'm still kinda afraid to go WOT in first

[adouglas]

Most fuel efficient speed?

Zero. With the engine switched off.

(Sorry, somebody had to say it….)

[outasight20]

My guess would be between 50-55 MPH on the highway

[Whiskey]

Originally Posted by EthioKnight

Just do the posted speed limit...
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Why go that slow?

Outside of built up areas I treat those signs as a suggestion

As for maxing mpg I'd guess 6k rpm in 6th on a straight road (but where's the fun in that )

[nezumiamalek]

This guy implemented a good drag reduction system

[exarch]

Originally Posted by trixter

you sure about that?

Wired article about controlling traffic lights

Their is also a mobile phone app that 'actually works' that can do this aswell, and there are ways to minipulate some traffic lights aswell(such as flashing ur highbeams) but most of it is illegal and doesnt always work, also you would still have to stop even if you do manage to minipulate the light, unless you could minipulate it well in advance. So the stop factor will still be an unstable veriable
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[exarch]

Originally Posted by exarch

Their is also a mobile phone app that 'actually works' that can do this aswell, and there are ways to minipulate some traffic lights aswell(such as flashing ur highbeams) but most of it is illegal and doesnt always work, also you would still have to stop even if you do manage to minipulate the light, unless you could minipulate it well in advance. So the stop factor will still be an unstable veriable

Oh ya, also forgot to mention the wind resistance changes depending if someone is driving infront of you and what they drive. So always being at the front of the light to remain at a constant speed if the lights were always green for you still would have its drawbacks. And also.depends how close you are tailgating.
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sorry, meant to edit not quote myself. I fail
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[exarch]

Originally Posted by trixter

most of the drag is behind the rider. That is why racers have that humpback.



Fix this and you get more on the top end, more mpg, etc.

They did a nice study of this using a pickup, surprisingly driving with the tailgate down increases resistance, personally I would of thought it would decrease resistance.
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[exarch]

Lol, if I had a computer I prob would be looking that up right now, but takes way too long on a phone, especially cuz I get crappy service in this building.

However I have figured out 3 ways to get amazing gas milage, infact you will never have to fill up your bike again(would provide pics but takes up too much data to use my photobucket and no way to attatch a file from the phone)
#1 put pedals on your bike(although peddling around a 300lb+ bike wont be easy, unless you strip the bike down)
#2 buy a camal and a rope, he can pull you around in style(my favorite)
#3 swap out engines for an electric motor(if they can do it for cars, why not bikes?)
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[exarch]

Sweet, but getting back on topic I think the most common answer is RPMs not speed. I think the question is kind of like how many licks does it take to get to the center of a tootsie pop. 1, 2, 3, chomp, the world may never know. In the tootsie pop the common answer seems to be who cares, it tastes good, not how many licks... although, alot of cars/bikes do revolve around the posted speedlimit(I think someone posted that here, or maybe else where. Either way sounds good to me, Wether its true or not I have no clue)
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[alex.s]

fuel efficiency? wuts that?

[Jiggles]

Originally Posted by alex.s

fuel efficiency? wuts that?

Something that helps prevent u from running out of gas

[alex.s]

you mean like a gas gauge? that craps for sissys. just carry an extra can of gas with you in your pack.

[Jiggles]

Originally Posted by alex.s

you mean like a gas gauge? that craps for sissys. just carry an extra can of gas with you in your pack.

That is incredibly homosexual

[alex.s]

how? because you cant have some dude ride pillion grabbing your loafs?

[250rr]

Originally Posted by trixter

well this is beyond the scope of the original thread which is what speed on a ninja 250 and it seems 650 is the most efficient.

As for electric bikes here is a street legal one that has a 100 mile range. There are a few electric bikes out there its just the rest look more conventional.

Link to original page on YouTube.

"...being electric, this bike has no engine..."

Wow! I was about ready to rant about how that is bs because it has an electric motor, which is the exact same thing as an engine. Then, I googled it just to double check myself, and found out that technically it doesn't have an engine.

Carry on.

[Whiskey]

Originally Posted by exarch

They did a nice study of this using a pickup, surprisingly driving with the tailgate down increases resistance, personally I would of thought it would decrease resistance.
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There's something about it in this video

Link to original page on YouTube.

[Miles_Prower]

Originally Posted by Liist

I've always thought it was generally in the highest gear with the least amount of throttle required to keep the engine at the same speed.

Spot on I think...I definitely read that somewhere. Highest gear = most wheel revolutions per engine rotation. Lowest possible engine rotations without the engine bogging down. My car is 6th gear, 2k rpm, which is about 55mph. Will have to see what the bike is.