[Diy_efi] Dyno tuning question

[Adam Wade]

--- Stephen M Andersen <steve.andersen at dol.net> wrote:

> However, how do you compensate for Acceleration
> Enrichment which may/will not be applied under these
> conditions, vs. tuning in an acceleration "sweep" on
> an inertial dyno?

On an eddy current dyno, you could do "sweep" runs
with varying load.  On an inertial dyno, you're stuck
with a single load (the mass of the drum).  Neither is
truly ideal, but either should be able to get you
reasonably decent "starting point" results.  You want
to add enough additional fuel to JUST prevent any
stumble, and no more (as a general rule), and have
that taper off as MAP stabilizes.

> Wouldn't the actual "act" of accelerating deviate
> from the steady state tune due to this?

There's no way to do it steady-state.  However, you
CAN do sweep tests with any load setting you like (you
can even set for an exponentially-increasing load, to
duplicate the conditions found with actual air drag
during acceleration).

=====
| 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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