horsepower versus torque????

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I never have really understand the formula for figuring out horsepower can someone help me on this, and also any ideas or guesses on how Chevy(Isuzu) came up with such a high HP figure and such a relatively low Tq figure(relative to there HP rating)? Just curious.

 

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Just some stuff I remember- One horse power is 550 ft-lbs per second or 33,000 ft- lbsf per minute- no this is not torque. Push something at one foot per second with 550lbs force of drag and that is one horse power. Be patient, I'm building. If you were turning a wrench one FOOT from the bolt and it had a constant drag, one revolution would cover 6. 28 ft or Two times Pi 3. 14 x 2=6. 28 . That drag is the torque. The energy expended in the one revolution is the ENERGY. When it is going at one revolution per second (or any rate) that is a RATE of energy or POWER. SOOO- we can derive what we need. total distance of a point one foot from a shaft= 6. 28 x Rounds. The energy expended is total distance traveled times the force. Thats why one foot was picked- in this case the force is torque. With the number of rounds in a unit time (say minute) we can get ENERGY RATE or the POWER. Here goes HORSEPOWER=(torque x RPM x 6. 28)/33,000 Reducing the numbers HP=(T x RPM)/5252. I did this in simple steps- I think that only one of the things here will tie it together- sorry if it was so long. I also did not refer to a formula book. I just derived them as I went so if you see a fuax pas please correct.

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P. Campbell 1998. 5 ISB 2500 auto green/driftwood

 

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The point- I forgot to mention toque and horsepower are very closely tied-leaving the only other variable the rpm you make it at. If you make your peak power way high in RPM the torque readings are low and the other way works if you make your power at 900 RPM the torque is very large. Normally peak torque and peak HP do not occur at the same time. For gasoline engines there are general "rules" that an engine follows for some reason --inherent in its design/cycle.

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P. Campbell 1998. 5 ISB 2500 auto green/driftwood