[HELP] Calculate Horsepower

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[HELP] Calculate Horsepower

Postby Chiptls » Thu Sep 06, 2018 1:37 am

Hey guys! I'm pretty new to tuning and i have a little doubt and maybe you guys could clear it up for me.

I'm currently looking at how to calculate the maxium HP a vehicle can do

I've done some researching and appears that the formula is:

(RPM * Torque) / 7120 = HP

However looking at manufacturer specification for lets say,Honda Accord 2.2 ctdi, the maxium HP should be 140hp @ 4000rpm.

Looking at the Torque Limiter map (stock), 4000rpm is 314 nm.

So (4000 * 314 ) / 7120 = 176 HP which is not correct by manufacturer specifications.

Maybe im misunderstanding something?

Thanks in advance.
Best regards,
Ruben Teles

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Re: [HELP] Calculate Horsepower

Postby jurebv » Thu Sep 06, 2018 9:14 am

internal engine torque and wheel torque are not the same thing...there are losses

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