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- Path: sparky!uunet!news.claremont.edu!ucivax!ofa123!Larry.Mc.Donald
- From: Larry.Mc.Donald@ofa123.fidonet.org
- Newsgroups: rec.autos
- Subject: Re: horespower/torque
- X-Sender: newtout 0.02 Nov 17 1992
- Message-ID: <n0f01t@ofa123.fidonet.org>
- Date: 19 Nov 92 11:19:00
- Lines: 30
-
- <bf0w+@andrew.cmu.edu>
- (Brett Earl Forejt) sez:
-
- > i was wondering, and have always wondered. Just what does horespower
- > and torque translate to? i mean does horsepower give you top-end and
- > torque bottom, or what? I have looked at torque and hp curves, and i
- > still am confused.
-
- > Example, what would the difference between a car with 100 hp and
- > 100 ft-lbs, and the same car with 200 hp and 100ft-lbs? or the same car
- > with 100hp and 200ft-lbs?
-
- You'll notice that the horse and and torque specs are always given
- at a particular RPM, usually not the same RPM for each spec. If most
- car companies had the decency to print torque and horsepower graphs
- instead of just quoting the best figure at optimum RPM, you'd have a
- better idea of what actually is. Very basically, the horsepower is
- (torque * RPM * some_constant) so you can see that the peak torque
- figure doesn't need to be the same as the peak horse. Usually, as the
- torque curve peaks out, it will flatten out a bit before heading back
- down, like the top of a circle, so the horse rating is taken as far up
- the torque curve as possible. Much more useful would be to get the
- actual plotted curves. A few firms do release these.
-
-
-
- ... Larry Mc Donald, N6ZMB, Fullerton, Calif. (cough, cough)
- ___ Blue Wave/QWK v2.10
-
- --- Maximus 2.00
-