HP Torque, Weight etc

[Tev62]

Power = (2*Pi*N*T)/60.

Where N= RPM /60 to get revs per second.
T=Torque

This formulae stands for a given rev value of course but it does highlight the simple relationship (in formulae form) of Torque and Power.

A common strategy of motorcycle manufacturers is to lighten up engine components, pistons, con rods, valve train, etc. and just increase the maximum red line with little real torque increase. Then they shout from the rooftops about how much extra power they have over their competitors. But given most riders do not sit at 11,000RPM most will never see that extra power. Now if a manufacturer can increase his torque lower down the rev range we can all feel that and possibly use it, especially on heavier motorcycles.

Hi Tev, is that so ? then if you look at a power and torque curve of some engine in a narrow rpm band, where the power curve is flat without peaks or much change, and the torque curve has a big kink or two ... or the opposite? Both cases are frequently seen in such charts. Since all the other multipliers in the equation are just constants ... how would you explain this ?

Hi Tev, is that so ? then if you look at a power and torque curve of some engine in a narrow rpm band, where the power curve is flat without peaks or much change, and the torque curve has a big kink or two ... or the opposite? Both cases are frequently seen in such charts. Since all the other multipliers in the equation are just constants ... how would you explain this ?
It is normally the torque curve that is fairly flat and the power curve climbing with speed. Don't forget that this calculation is only in a certain RPM. A torque curve can have a dip but the power curve still climbing because the revs are still increasing too on the given chart.