Quote Originally Posted by Jayyk31 View Post
Curious about the "power at rear wheels" pid. Where does the info come from and what does EFI Live use to calculate it? I logged it last night and got readis from 0-650. Is this pid accurate?
This pid is the power left over to accelerate the vehicle (F=m.a) after all friction has been overcome (powertrain fiction, road/tire resistance, air resistance).

This pid calculates P=m.v.a where a = dv/dt and m is vehicle mass.

The accuracy of this pid goes up as the log sample rate increases (i.e. 40/s vs 10/s).

To properly use this pid requires an understanding of Physics, which I'm sure you have (doesn't everyone...?)

If you log this pid on the way up (accelerating) and then log it on the way down (coasting down) on the same road under the same conditions, you can calculate FWHP to a reasonable estimate by subtracting.