Question 1

Why is the constant 5252 used?

Accepted Answer

It arises from unit conversions between torque in lb-ft, rotational speed in rpm, and power in horsepower.

Question 2

Is this relationship always exact?

Accepted Answer

It is a mathematical relationship assuming consistent units and rotational speed. Real engine output includes efficiency and measurement differences.

Question 3

Can I compare engines using this?

Accepted Answer

You can compare using consistent torque and RPM measurements. Always consider where in the RPM range the torque is measured.

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