Horse power

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XB08 · #1 Post by **XB08** » Tue Feb 10, 2009 12:27 pm

Can anyone guess wich one has the best power to weight??? That for a stock bike not custom made.

XB08 · #2 Post by **XB08** » Tue Feb 10, 2009 12:53 pm

So many out there think that the V-max is king, Wrong. It's not much better then my Buell .

2009 V-max .288
My Buell .257
2009 BMW K1300R .362

and I would have to say the winner will be .

2009 MV Aqusta Brutale 1078 .377

I look at only nake bikes and you might find one that is better.

#3 Post by **Wrider** » Tue Feb 10, 2009 1:26 pm

Suzuki Hayabusa comes in at .406
08 CBR1000RR comes in at .368
Oh and for comparison to the V-Max the B-King comes in at .380

XB08 · #4 Post by **XB08** » Tue Feb 10, 2009 1:35 pm

I must have figure it wrong, I Div weight into hp. I know there are some really high HP bike out there .

RhadamYgg · #5 Post by **RhadamYgg** » Tue Feb 10, 2009 1:45 pm

And when the B-King is in B mode - it really is reasonably tame. Perky is what I'd call it in A mode.

But then again, I haven't really twisted the throttle in either mode.

RhadamYgg

TEvo · #6 Post by **TEvo** » Tue Feb 10, 2009 6:17 pm

power to weight is ratio = weight / hp (weight divided by hp).

I think there are two important factors to consider when calculating:

Curb (wet) weight. Most manufacturers specify a dry weight (no battery, no gas, no coolant, no lubricant, maybe helium in the tires...). Add all that back in plus the weight of the rider and...

Second, need to calculate using using rwhp (rear wheel horsepower, measured on a dyno). Which typically is ~ 15% lower than the mfr. claims specified as brake horsepower (bhp, measured at the crank).

It's a tossup between any of the Big Four 1000cc supersports (CBRGSXRYZFZXR1000s) or the 1300/1400cc so-called "hypersports" (ZX-14R, GSX1300R Hayabusa).

That said, I think the Ducati Desmosedici RR has the most impressive power to weight ratio. However, although it is technically a stock bike, it is limited production and you need to uncork it by having the "off-road only" ECU and exhaust system installed (it comes crated with the bike).

Magna · #7 Post by **Magna** » Fri Feb 13, 2009 7:20 am

Am I calculating this wrong? My 1997 Honda Magna is 505 lbs and according to the manufacturer 88 HP. That results in 5.80 if it is the weight divided by the HP.

#8 Post by **Big B** » Fri Feb 13, 2009 7:27 am

other way around. 88/505 = .174

TEvo · #9 Post by **TEvo** » Fri Feb 13, 2009 7:27 am

That sounds right to me. 1:5.74 (1hp per 5.74 lbs of vehicle weight)

Consider a BMW 335i cage with ~ 330bhp but a ~ 3500lb curb weight has a 1:10.6 ratio. Or a $200K Lamborghini Gallardo with ~ 525bhp and 3800lb curb weight is 1:7.24.

You have a mighty impressive power to weight ratio.

PacificShot327 · #10 Post by **PacificShot327** » Fri Feb 13, 2009 7:37 am

TEvo wrote:power to weight is ratio = weight / hp (weight divided by hp)

Switch that one around. That's the weight to power ratio, commonly applied to aircraft to measure climb performance in comparison to other units. Power-to-weight ratio is hp/weight.

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