Quote:
Originally Posted by Fundguy1
Quote:
Originally Posted by trey100
The formula is correct but a car's torque can peak below 5252 and still have a higher HP number. Depends on how that torque falls off as RPMs rise. For instance if you have a car that "peaks" at 406 lb ft at 1850 rpm but still has 375 lb ft or torque at 7,500 rpm, then in that case
HP = 375 x 7500/5252 which is 535 HP.
You can't look at torque and HP at 2 different RPMs and compare them. They are happening at different points. To calculate HP across the rpm range, you look at the torque throughout the rpm range and calculate the corresponding HP at each rpm. Graphing that gives you the HP curve.
This is why HP and torque curves always intersect at 5252 rpm. Regardless of the torque value the equation will always give you a HP equal to the torque value.
An S2000 has a relatively flat torque curve all the way up high in the rpm range. Therefore the horsepower curve is close to a line in shape compared to say an M3 that has a drop off in torque up high and therefore has a rounded off hp curve.
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This is the correct calculation for the US. I don't know why you guys are interjecting other international standards for measurement. That wasn't the OP question nor was it asked. The OP asked how a car could have higher torque than horsepower vs the other way around.  |
The OP did not ask that. He asked why it couldn't have a higher HP than torque.
The short answer is - it could.
My response was to the part I quoted. Just correcting it. That quote said cars with a peak torque below 5252 will have a HP number lower than the torque. I was clarifying that as long as there wasn't a steep drop off the HP could still be numerically higher with a peak torque below 5252.