Auto learn code

[Bruce Plecan]

----- Original Message ----- 
From: Scot Sealander <Sealand at clarityconnect.com>
Subject: Auto learn code

Congrats!!
This is in the 727?.
I'm impressed
Grumpy


| 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
|