[Diy_efi] Area under torque curve?

[Mike Diehl]

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?

     > 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?

     > Reasonable power in a
     > reasonable rpm-range makes an engine reasonable ;-)

Sounds... reasonable. <whack!>

     > If you really want some "area", you should look at the average power
     > in a range that reflects your gear ratios, somewhere around RPM of
     > maxP. Than you almost know at which points you should change gears for
     > max acceleration and what performance to expect.

I was alluding to this in my original post.  Thanx for expanding on it.

-- 
Mike Diehl
'87 MR-2, 7A-Ge, Hand-bent headers
'96 4-Runner, Bone Stock
'90 Corolla, disguised as a Geo Prism.

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