[pietran30]

For the challenger rt 6 speed dodge claims 376 hp at approx 5200 Rpms and 410 ft-lbs of torque. If you do the mathematical calculations for hp based off of the torque:

[(410 ft-lbs x 5200 Rpms) / standard value of 5252] = 405 hp...?

Anyone know how dodge calculates HP on their cars?


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Edit: Doing the math for other cars I'm finding that this formula could not possibly be correct... Any help here lol?

 

[Yahooligan]

They calculate it the same way as everyone else. The mistake in your thinking is that peak torque doesn't happen at the same point as peak HP.

 

[pietran30]

They calculate it the same way as everyone else. The mistake in your thinking is that peak torque doesn't happen at the same point as peak HP.

Ugh Duh! I should have thought about that lol. Thanks for the clarification.


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[pietran30]

Still though, if you substitute 410 ft-lbs @ 4200 Rpms in the equation above, u end up with only 328 hp... Sooo?


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[Yahooligan]

Still though, if you substitute 410 ft-lbs @ 4200 Rpms in the equation above, u end up with only 328 hp... Sooo?


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Yeah...because peak HP doesn't happen when peak torque does. As you know, HP is a calculation based on torque and RPM. The only time you'll have torque = HP is at 5252 RPM.

 

[pietran30]

Yeah...because peak HP doesn't happen when peak torque does. As you know, HP is a calculation based on torque and RPM. The only time you'll have torque = HP is at 5252 RPM.

Dude you are really making me slap my forehead lmao.


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