Originally Posted by ThEGr33k (Post 2126365)

Right then... The MCN test our this weak, the 4 Jap bikes vs the BMW S1000RR.

The problem? Power, basically MCN have tested them on a Dyno (apparently) and the lines and numbers they have come out with are interesting to me, but not in the usual "wooo thats nice aint it" kind of way, its in the "how the hell can that work?" kind of way.

Right then, people might know that the Torque (ft-lb) and Power (BHP) are directly related and you can convert torque at a certain RPM to BHP at that same RPM simply by doing torque x RPM / 5252=bhp and bhp/rpm x 5252 = torque.

So from that you will know that if two completely different bikes have the same torque at the same RPM they will have the same power. and visa versa.

Now look at this picture:

http://forums.sv650.org/attachment.p...1&d=1261012247

What looks off to you? Well either the power line for the BMW is way off or the torque line is. Why? Well as above, if the BMW has a power line above the other bikes, its torque line should be also... is it? Nope. So, which one is wrong? Id guess power line, and that the torque is pretty much bang on. Which means that if the torque at 11,800rpm (where the power graph says peak power is) is about 72ft-lb (hard to tell with scale of graph) the power will be 75*11,800 / 5252 = 162BHP.

So what if the power line is right? Well 183 / 11800 x 5252 = 81.45 ft-lb at 11,800 RPM, now that is pretty unlikely imo, a Desmo RR Motogp replica dont even make that at that sort of RPM!

So what do you think? How on earth did this get past them at MCN (he he)?

cheers for reading.

Originally Posted by johnnyrod (Post 2126601)

A mistake in MCN? No way! I'm mildly surprised they don't all make 1,000,000+BHP and corner on rails

Originally Posted by sinbad (Post 2126631)

The graphs don't correlate with one another at all, it's not just the BMW. According to that, the R1 and CBR both continue to make close to peak power at 12k rpm even though the torque has dropped to nought by then.

It's like the two charts were made from two lots of very different dyno runs, or two seperate people guessed them. (Or one incredibly dumb person).

Originally Posted by Alpinestarhero (Post 2126706)

so perhaps we should send a link to this thread to the editor of MCN?

maybe he can get someone to explain whats gone wrong in the Mathematics and Statistics deparment at MCN Towers :lol:

"ah, yes, well, t'trouble you see was we forgot to carry t'one"

Originally Posted by ThEGr33k (Post 2126761)

lol Hope that t' is not a hit at my accent :rolleyes:

Originally Posted by Alpinestarhero (Post 2126804)

na, its just my generic "number crunching" accent :smt041 in my head its a nice soft irish accent