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Turtle_n_Peeps's avatar
Turtle_n_Peeps
Explorer
Jan 25, 2015

The mysteries of Horsepower and other things explained

There seems to be a lot of confusion about the mysteries of engines by some on this site so I will post some links and add some text to try and clear some of this up. First some terms: Torque: A...
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wnjj's avatar
wnjj
Explorer II
Jan 27, 2015
davisenvy wrote:
2200 ft and rpm of the Tundra was screaming. Not sure exactly, but over 6k.


the web wrote:
Power: 381 hp @ 5600 rpm


1) If the Toyota was turning more than 6k rpm, it wasn't producing its 381hp anymore.

2) The 381hp is probably measured at an ideal temperature and at sea-level.

3) The Duramax's tune adds an unknown.

4) Manufacturers may over/under rate their engines.

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