Torque over horse power

[Paul_G]

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.

 

[383man]

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

 

[Dennis H]

Mine was 480 Torque and 415 RWHP Chassis Dyno. Stopped pulling at 4850. In the basement as I like it.

 

[Budnicks]

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}

 

[WileE]

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.