Air Flow Measurement

[RABBITT_Andrew at mv8.orbeng.com.au]

>> What's wrong with speed-density?  And what exactly do you do to it? 
>>I thought it was just found by Air=K*MAP*RPM (where K is a magic 
>>constant), but I'm naive.  Am I going to get into trouble using 
>>this?
>
>There is nothing wrong with speed-density, especially if you are not 
>worried about emissions certification. 

I get upset whenever somebody maligns the humble MAP sensor and speed 
density calculation! :)  Let it be known that the ULEV Honda Accord 
uses a MAP sensor and speed-density airflow calculation.

After trying to get a MAF to work with a reasonable error over the 
speed-load map, I'd gladly toss it out and use a MAP sensor except 
that you can't MAP and EGR at the same time.

I think if most people who swear by MAF had a reference airflow 
measurement to compare it to, they'd be horrified!