[Diy_efi] New to list, have a question about speed density and turbos

[Adam Wade]

--- Startled Jackrabbit <bluefire211 at yahoo.com> wrote:

> My car can reach full boost before I am at full
> throttle, IE, I might reach it at 80% throttle.  The
> ECU will think that this is the maximum airflow,
> although I know much more will enter the engine at
> 100% but the pressure will not increase, thus I will
> lean out.

I'm more than a little confused.  If the pressure
remains the same, then the same amount of air will be
entering the engine each intake cycle, throttle
position notwithstanding.

Why would it lean out if the intake manifold pressure
is not changing?  And if the pressure is not changing,
how can the rate of acceleration change?  The way you
describe it, that last 20% of pedal travel makes no
difference whatsoever in how the car runs.

=====
| 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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