Torque and HP have a direct mathematical relationship. If you know one,
you can calculate the other. What people are really refering too when they
talk about gaining torque vs. gaining HP is moving the power band of an
engine.
Here are the formulas and an explanation:
Horsepower = TORQUE x RPM ÷ 5252
Torque = HP x 5252 ÷ RPM
Horsepower comes from torque. Torque comes from the pressure of combustion
in the cylinder because combustion pressure causes the piston to turn the
crankshaft which is measured as torque. The trick is to generate high
enough pressure on each stroke and to do it often enough (RPM) to produce
the horsepower needed.
Example: What torque is required to generate 329 HP at 6000 RPM?
T = 329 x 5252 ÷ 6000 = 288 foot pounds @ 6000 RPM
Example: What torque is required for 296 HP at 4880 RPM?
T = 296 x 5252 ÷ 4880 = 319 foot pounds @ 4880
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:56:01 EDT