[Diy_efi] Area under torque curve?

[Greg Hermann]

At 6:55 PM 1/3/03, Mike Diehl wrote:
>On Friday 03 January 2003 05:49 pm, Marcell Gal wrote:
>     > The torque curve is informative since it is flatter than the power
>     > curve (and it's like VE).
>
>So, if I could get either the torque or power curve, which would be more
>useful in tuning?  And would the torque curve be a good/close approximation
>to VE, or is it only *like* VE?

It's a decent approximation. The VE peak is a bit higher than the torque
peak, VE is relatively lower than torque below the peak and relatively
higher above it. The differences are because friction increases with rpm.

Greg
>
>     > A common misconcept that high torque is more important than high
>     > power. Power accelerates car, not torque. (One can simply make a low
>     > rpm motor with extremely high torque).
>
>I'm still trying to wrap my brain around this.  I understood that power
>indicated how much work an engine could do.  If so, this would indicate how
>FAST a car can go.  Torque is how much force is applied to the car which
>would indicate how QUICK the car is.  What am I missing?

Gearing.



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