LEAFguy
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Sat Nov 20, 2010 5:51 pm

If you're interested, I addressed this topic awhile back on my blog.

The short of it is this - the electric motor can run at 10,390 RPM max (according to Nissan(click LEAF Technical data under Documents)). Based on that, reduction gear ratio, and tire diameter, the LEAF is capable of roughly 94 MPH. If going downhill when a speed run is attempted, I suppose it might be possible for the tires to drive the motor, vs. the other way around, thus exceeding the aforementioned max speed. Plus, as previously mentioned, we don't know the error of the LEAF speedometer.

LEAFfan
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Sat Nov 20, 2010 10:12 pm

tcimpidis wrote:
LEAFfan wrote:
mwalsh wrote: I can say affirmative on that one. With that kind of torque, I should be able to take a vette off the line easily. I heard it will feel like a V6, but with instant torque. ICEs don't have instant torque.
Ummm... I don't think so. First of all, front wheel drive cars are at a real disadvantage during acceleration due to weight transfer. Second, the Vette has so much torque at idle rpm anyway and revs so quickly that it can light up the tires to well over 40. Its problem off the line is usually that it has TOO much torque. I've owned one - I know.

Also, I have not seen it mentioned anywhere here but I would believe the 98 mph speed much more readily if it was off a GPS. We have no idea how accurate the Leaf speedometer is at that speed and thus an indicated 98 might actually be 90, 91 or who knows...

Tom
I highly doubt that the speedo will be off by 7 or 8 mph. I've NEVER seen one off that much. I could believe anywhere from +4-+1, but the only speedo I've ever had that was calibrated perfectly was a VDO gauge on my VW Rabbits. My Civic GX is off by 1 at 75 and that's only because I put different tires on it.
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garygid
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Sun Nov 21, 2010 10:52 am

Production speedometers in cars are required by law to read high, usually at least 1.5% to 2% high depending upon the country.

As I recall, the EU is higher than the USA.

The CAN bus "Speed" usually has the "correct" speed.

I think that odometers are required to be "correct", right?
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TimeHorse
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Tue Dec 14, 2010 9:40 am

LEAFguy wrote:If you're interested, I addressed this topic awhile back on my blog.

The short of it is this - the electric motor can run at 10,390 RPM max (according to Nissan(click LEAF Technical data under Documents)). Based on that, reduction gear ratio, and tire diameter, the LEAF is capable of roughly 94 MPH. If going downhill when a speed run is attempted, I suppose it might be possible for the tires to drive the motor, vs. the other way around, thus exceeding the aforementioned max speed. Plus, as previously mentioned, we don't know the error of the LEAF speedometer.
The amount of acceleration a car can obtain through downhill slope is less than it's free-fall terminal velocity.
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garygid
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Tue Dec 14, 2010 10:31 am

Apparently Governmental rules/laws require car speedometers to display higher than your actual speed, something like "at least" a percent or two.

In the EU I think it is "at least 2% high". My Prius reads 2 mph high (about 3%) when going around 65 and 70.

So, reading 2 to 4 mph high at 90 should be expected.
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leafme
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Tue Dec 28, 2010 8:27 pm

indyflick wrote:Here's an interesting video of a LEAF accelerating to 98 MPH (157 KPH) on a highway somewhere in the EU.
Cool post. Thanks. One subtle point most Americans will not notice in this video is that drivers move to the right to allow the faster cars to pass. In America everyone seems to think they are the only one on the road and stay in the left lane even with others right on their tail.

LEAFfan
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Wed Dec 29, 2010 12:53 am

garygid wrote:Production speedometers in cars are required by law to read high, usually at least 1.5% to 2% high depending upon the country.

As I recall, the EU is higher than the USA.

The CAN bus "Speed" usually has the "correct" speed.

I think that odometers are required to be "correct", right?
I can tell you...if the speedo is off, so is the odo. My Scangauge II proved that.
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garygid
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Thu Dec 30, 2010 12:46 am

How did SGII prove that odo and displayed speed errors are correlated?

On my Prius, at 69 indicated, the SG says 67.

So, the indicated odo could be correct, right?
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TomT
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Thu Dec 30, 2010 11:00 am

Many also do not realize that, as tires wear, the speedometer error also increases due to a smaller tire circumference which makes the indicated speed higher. Tire pressure will also play a small role.
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markuss64
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Re: Video of LEAF traveling at 98 MPH (157 KPH)

Wed Jul 03, 2013 2:25 pm

Hallo everyone, I drive very often at 160km/h here in Italy. The speed is self limited by Nissan, in downhill can't go faster and the power indicator is at 3 or 4 dots. Going that fast significantly reduces the range by half... abt 80km. Not much sound from engine, just wind & tires. Ciao!

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