M6 @ 205MPH (330kph)

[ae86_16v]

http://video.google.com/videoplay?do...&q=suzuki+gsxr

[RC45]

Well since we have a thread going about how innacurate BMW speedos are.. 10 to 12% over...

205mph on the clock is really only 180ish.

Not that impressive :p

[ae86_16v]

Originally Posted by RC45 Well since we have a thread going about how innacurate BMW speedos are.. 10 to 12% over... 205mph on the clock is really only 180ish. Not that impressive :p

[nthfinity]

Originally Posted by RC45 Well since we have a thread going about how innacurate BMW speedos are.. 10 to 12% over... 205mph on the clock is really only 180ish. Not that impressive :p

well, we can definately tell if we know the final gear ratio/tire size (wich is findable) since we know the RPM, and hes in top gear looked about 7400-7500 rpm adjusting from the view of the passenger

[Vansquish]

also have to account for tire growth at that kind of speed.

[dangerously_cool]

That's still a pretty cool video. I like the M6.

[RC45]

Originally Posted by nthfinity Originally Posted by RC45 Well since we have a thread going about how innacurate BMW speedos are.. 10 to 12% over... 205mph on the clock is really only 180ish. Not that impressive :p well, we can definately tell if we know the final gear ratio/tire size (wich is findable) since we know the RPM, and hes in top gear looked about 7400-7500 rpm adjusting from the view of the passenger

 
Tire Size [inches]: Diameter - 26.8" 
  Transmission Gear Ratio:     1: 0.833 
  Rear Axle Gear Ratio:          1:3.62
  Maximum Engine Speed (RPM): 7400    
 
  Top Speed (mph):     195.7mp

Assuming the revs are accurate - thats 5% over reading - sort of nullifies the magazine artcicle about how inaccurate BMW speedos are.

[Just_me]

There is another video were the same M6 drive 336km/h according to the speedo. BMW claim that M5 has a topspeed of 328km/h and they could be right. Hopefully they are going to test the car around Nardo.
Alpina B5 Touring has a topspeed of real 319km/h according to the latest Nardo test.

BTW BMW speedo isnt more inaccurate than other carbrands.

[Shinigami]

I wonder how quickly the owner will crash his car...

[RC45]

Originally Posted by Just_me BTW BMW speedo isnt more inaccurate than other carbrands.

Not according to the BMW Techs on this board...

And the articles publsihed supporting this claim.

You obviously missed out the whole "top speed" discussion.

[ZfrkS62]

Originally Posted by RC45 Originally Posted by nthfinity Originally Posted by RC45 Well since we have a thread going about how innacurate BMW speedos are.. 10 to 12% over... 205mph on the clock is really only 180ish. Not that impressive :p well, we can definately tell if we know the final gear ratio/tire size (wich is findable) since we know the RPM, and hes in top gear looked about 7400-7500 rpm adjusting from the view of the passenger Tire Size [inches]: Diameter - 26.8" Transmission Gear Ratio: 1: 0.833 Rear Axle Gear Ratio: 1:3.62 Maximum Engine Speed (RPM): 7400 Top Speed (mph): 195.7mp Assuming the revs are accurate - thats 5% over reading - sort of nullifies the magazine artcicle about how inaccurate BMW speedos are.

The revs would be accurate, certainly. I am still a bit confused as to why BMW would allow such a variance. I'll have to talk with our FSE about it or maybe the instructor when i go to class in Feb.

[Just_me]

Originally Posted by RC45 Originally Posted by Just_me BTW BMW speedo isnt more inaccurate than other carbrands. Not according to the BMW Techs on this board... And the articles publsihed supporting this claim. You obviously missed out the whole "top speed" discussion.

I listen to the Nardo-test but there is noway a M5 are going to have a slower topspeed than Alpina B5 Touring. Also I dont know why I should listen to your expertise instead of BMW.

This is from BMW and the topspeed is theoretical. "When to change gears"
1 gear: 71,5 km/h
2 gear: 107,4 km/h
3 gear: 157,7 km/h
4 gear: 204,6 km/h
5 gear: 245,8 km/h
6 gear: 284,8 km/h
7 gear: 341,9 km/h

[dash]

Guys if those bike were running at their top speed than this 330km/h is quite possible. GSX-R 1000 (that was K4 model I guess) goes a bit over 300km/h I'm not sure about CBR 1000RR but Suzuki can reach 300km/h.
Speaking of inaccurate speedos seems like Enzo has very very accurate speedo because I seen a test on Nardo track where Enzo showed 355km/h and all the measure instruments from technicans also showed 355km/h. Pretty impressive huh?

[kompak]

well..i think the tyres wouldn't last longer if he takes a lot of time to reach that speed..
time is important...
wonder what happened to the tyres?

[RC45]

Originally Posted by Just_me Originally Posted by RC45 Originally Posted by Just_me BTW BMW speedo isnt more inaccurate than other carbrands. Not according to the BMW Techs on this board... And the articles publsihed supporting this claim. You obviously missed out the whole "top speed" discussion. I listen to the Nardo-test but there is noway a M5 are going to have a slower topspeed than Alpina B5 Touring. Also I dont know why I should listen to your expertise instead of BMW. This is from BMW and the topspeed is theoretical. "When to change gears" 1 gear: 71,5 km/h 2 gear: 107,4 km/h 3 gear: 157,7 km/h 4 gear: 204,6 km/h 5 gear: 245,8 km/h 6 gear: 284,8 km/h 7 gear: 341,9 km/h

Dude -- and I mean that as bluntly as possible.

It is not "listening to my BMW expertise" - it is math.

The engine spins, turns gears in the transmission that then in turn spins a drive shaft which inturn spins a diff that spins a tyre.

The tyre is a known radius (and thus circumference) and due to the ratio of the gears we can calculate how fast the tyres turn at given engine rpms.

Simple.

Not debatable.

These are the speeds the car will run at given rpm.

And it wasn't my expertise about the inacurate nature of BMW speedos.

It was Car & Driver.

http://www.caranddriver.com/article....rticle_id=1907