Quote:
Originally posted by scargo70
Also if there oversquare is there undersquare?
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Yup. There are plenty of square and slightly undersquare designs out there.
Torque and HP are linked in the formula:
HP = torque * (RPM / 5252)
So, suppose your engine makes 300lbs/ft at 1500rpm. The HP at that rpm is
= 300 * 3000/5252
= 171HP
Perhaps you noticed that horsepower and torque are equal at 5252 rpm. Neat, huh? Check some HP/Torque graphs and you'll see they always meet there. Physics at work.
From this function you could derive that making more torque at higher rpm is the secret to making higher horsepower. The key is to make sure that the torque curve does not fall off, and you'll get to big HP numbers as the rpm's rise. From the formula we see that HP will get bigger with rpm, but a falling torque curve will eventually cause HP to drop off too.