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post #1 of 3 (permalink) Old 03-13-2013, 01:13 AM Thread Starter
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HP Torq RPM formula

Noticed post compairing equipment and HP or Torque variences. Im an old Diesel tech that has used this formula for years .
HP= torq x rpm / 5252
Torq = hp x 5252 / rpm
RPM = hp x 5252 / Torq.

If you know any 2 varables you can calculate the third.

I have seen post where torq was stated as the same for 2 different dyno runs but the HP changed. This is likely the result of RPM point being diffrent .
Meaning that either torq or rpm measurement point must differ, else the hp should be the same.

Thought this might help when comparing components & HP claims. Torque and RPM mathimatically equate to Horsepower.
just my $ .02


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post #2 of 3 (permalink) Old 03-13-2013, 07:26 AM
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Good info!!
On occasions, I use this:
The angle of the dangle x the motion of the ocean = the torque of the pork.
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post #3 of 3 (permalink) Old 03-13-2013, 09:10 AM
prodrag1320
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Quote:
Originally Posted by kenrena1 View Post
Noticed post compairing equipment and HP or Torque variences. Im an old Diesel tech that has used this formula for years .
HP= torq x rpm / 5252
Torq = hp x 5252 / rpm
RPM = hp x 5252 / Torq.

If you know any 2 varables you can calculate the third.

I have seen post where torq was stated as the same for 2 different dyno runs but the HP changed. This is likely the result of RPM point being diffrent .
Meaning that either torq or rpm measurement point must differ, else the hp should be the same.

Thought this might help when comparing components & HP claims. Torque and RPM mathimatically equate to Horsepower.
just my $ .02
your math is correct,when we still had our dyno,we messed with it a bit.the results were closebut not right on
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