Auto learn code

[rr]

This is great, are you using a wide-band O2, or are you just doing
cruise areas?

As far as the MAT, the v-8 f-body guys have been moving them
further upstream from the manifold. It's claimed that it helps after
sitting in traffic (at a light?), and then taking off (heat build-up).

A v-6, '92 f-body has the MAT in the aircleaner housing which is
located opposite the battery.

BobR.

Scot Sealander wrote:

> Well, spent the weekend out driving around with the auto learn
> code installed in the ECM.  It works!  After a lot of driving around in
> various load/speed settings, the VE table is coming together.
>
> An observation.  I think the manifold is a terrible place to put
> the MAT sensor....  (The learn code also stores the MAT sensor
> readings, to compare the VE numbers recorded at different MAT temps.)
> At low airflow (like idle) the MAT temp is quite high.  The more
> the airflow, the lower the MAT gets.  But I think the MAT air temps
> are a lot higher than actual air temps.  As today, at 20 to 30
> degrees F colder than Saturday, the VE numbers are different, esp at
> idle.
>
> I am using a air temp density table that is close to the theoretical
> air density change with temp.  This may not work with a MAT sensor,
> as it seems to get artificially warmed....  The next logical step
> seems to put the air temp sensor at the output of the intercooler,
> and use a airflow based adder to get actual cylinder air temp.
>
> Scot Sealander