As the title asks. And how does that table relate to the various MAF tables. I have an '87 165 ECM using the 6E definition file.

 

First Post by RBob:

"This value is then tested against a maximum value. The maximum
is from a lookup based on RPM." (Max Air Flow vs RPM? pandin) "If the calculated value is greater then the max allowed by RPM then the max value by RPM is used as the gms/sec term.

Otherwise the calculated value is used as the gms/sec term."


Also RBob 3rd Post

"10) The gms/sec term is then tested against a
maximum airflow based on RPM. This is from the
table as descibed in a previous post.

-done calculating the gms/sec term-"

 

Sooo, what I need to do is to go out and run my scanner and build up a good picture of my airflow VS RPM,,, then modify the "Max Air Flow vs RPM" table to match or be about 5% higher.
I figured that there were two ways the ECM would use this table, 1) as a default table in case the MAF failed, or 2) as a check table. So its #2.

 

Update: Lesson learned; I thought that I would be clever and get the Max Air Flow values down closer to the actual (thinking that the table could be used as a back-up air flow table if the MAF failed, but thats stupid!). Well, apparently I got it to close and the engine ran sporadically bad. Put the values back to where they were, and the engine runs great!

 

You probably should not be running stock values in that table. With your mods and increased cubic inches you should bump that table up to be sure you do not end up running on the max values at WOT.

 

I had bumped them up along time ago. Like I said, this last adjustment was just plain stupid.