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Torque over horse power

Paul_G

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I am curious why the torque number would be so much greater than the horse power number? The last time I had it on a chassis dyno it was making 365 Ft# and 255 Horse at the wheels. Torque peaked about 3100 RPM, horse peaked about 4100 RPM on the dyno graph.

It is a 72 360, Holley 670, Eddy RPM Air Gap, Hooker long tubes, MSD ignition.
 
Well many engines make more torque then HP and it depends on the build also. And torque will peak at a much lower rpm then HP will. Look at many stock HP and Torque ratings like the 426 Hemi.....425 hp and 490 ft lbs.
340.....275 hp and 340 ft lbs
440-6pk.....390 hp and 490 ft lbs. Just to give an idea. Ron
 
Mine was 480 Torque and 415 RWHP Chassis Dyno. Stopped pulling at 4850. In the basement as I like it.
 
A little off topic BUT

Torque is what initially moves you,
HP is where the MPH & RPM's factored in comes from,
a combination of gear ratio {10:1 1st gear trans low gear x rear gear}
& proper torque converter stall speed, for your specific weight, camshaft/gear ratio,
will help you move the car more easily, especially a much heavier car,
more weight the less stall speed will effect it more, to an extent
{unless you have a trans-brake}
lighter cars won't be able to stall as high, even with the exact same stall speed,
you'd need a little looser converter to achieve the same effective stall speed,
need a converter, with the best stall speed, is in "about your peak torque RPM"...

that's really over simplifying it allot, but it works pretty well...

Until you start getting over like 700-800hp {or more} or so
& much higher engine RPM's,
then the peak torque #'s are less than the HP #'s
& intersect at about 5800rpm {ballpark #'s}
 
Torque is a rotational force around a pivot ( like when you've using a breaker bar with the socket on a bolt). Horsepower is the rate of work, for our purposes, HP = torque X RPM \ 5252.
 
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