[s-cars] 3071 turbo & Pastore RS2 code question

[Joe Pizzimenti]

It's about time you admitted it.

Now go lie down.

On 3/21/06, Dave Forgie <forgied at ae.ca> wrote:
>
> Apologies to all:  I must have been mistaken about the pinging because
> between all the goodies Dave D. lists below and the twin knock-sensors,
> there is obviously no way in H*LL that I should get any pinging with the
> obviously vastly superiour "pastore" software.  Must have been
> something else I heard.
>
> Of course, when I did change the software to MRC software and made no
> other changes,  the fact that the thing that I apparently didn't hear
> before because I am SO STUPID, went away, well, gosh, I don't know
> what to say.  Must have all been a dream.
>
> Oh, yeah.  The two other guys local to me with the same hardware and
> software (originally), they must have been dreaming that they heard
> pinging too.  I am sure that they will apologize as well.
>
> Dave F.
>
> >>> <djdawson2 at aol.com> 03/21/06 12:47PM >>>
> That statement would be true if there were no means to correct
> mixture.  However, those means do exist.
>
> 1) The MAF measures the mass of air... thin or dense, mass remains
> constant... and that's one way the ECU determines the fuel requirement.
> 2) The ECU incorporates a barometer... which identifies changes in
> altitude, and modifies A/F R.
> 3) The ECU takes input from the O2 sensor... and also changes A/F R based
> on those readings.
>
> Now, if we had an 034EFI system, installed and programmed it in a car at
> high altitude... trailered it to sea level and hit the dragstrip... THEN
> we'd have a meltdown.  Only one map (fuel,ignition,boost)... no compensation
> ability for altitude... no means to deal with denser air (not even a MAF).
>
> This is why I have stayed away from standalone engine management.  Hap's
> car will be an interesting "test mule" to see how the AEM system can deal
> with it.  Regardless, I would still expect him to have problems when he goes
> to sea level... and substantial additional programming will be required to
> make it work right down low.
>
> Dave
>
> -----Original Message-----
> From: Dave Forgie <forgied at ae.ca>
> To: s-car-list at audifans.com
> Cc: pkrasusky at ups.com
> Sent: Tue, 21 Mar 2006 13:25:31 -0700
> Subject: [s-cars] 3071 turbo & Pastore RS2 code question
>
>
> The "fact" part was about air at sea level being more dense than say air
> in
> Denver or maybe even Connecticut and that for a given amount of fuel,
> this will result in a higher (leaner) Air/Fuel ratio at sea level.
>
>
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