[Diy_efi] RE: Diy_efi digest, Vol 1 #413 - 12 msgs

[Adam Wade]

--- William Shurvinton <shurvinton at orange.net> wrote:

> Is this 'Shannon load' or other load?

Haha!  ;)

When I talk of load, I am talking of how much power is
absorbed by the driven device, and how quickly.

> If I goose the throttle in first I can accelerate at
> around 1g on a dry road. It's not a static case, but
> it certainly is load and I would expect every HP I
> have paid for to be torturing my tyres.

It seems to be, from my experience, much easier to
measure changes steady-state than delta.  Which is why
tuning problems are more obvious in higher gears, in
my experience; with more drag loading the car, you're
dealing with a characterstic instead of a transient,
if you follow me.

> OK logging that burst wouldn't enable you to tune
> from it, but on an eddy current dyno where you can
> put full load on what would you do to maximise
> lower gear acceleration?

Regardless of how the power ends up being distributed
(friction, acceleration, wind drag), best power is
best power.  If you tuned every load/speed cell in the
map for best power, you might not get the very best
possible gas milleage, but you should have optimized
the power output everywhere, and thus see it in
improved times down the road in lower gears as well as
higher ones.


=====
| Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
|   http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/   |
| "It was like an emergency ward after a great catastrophe; it  |
|   didn't matter what race or class the victims belonged to.   |
|  They were all given the same miracle drug, which was coffee. |
|   The catastrophe in this case, of course, was that the sun   |
|     had come up again."                    -Kurt Vonnegut     |

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