Actuall air flow readings or not???

[madman]

I was just thinking about using a S-AFC and or GM MAFT and the affects on the car. They are used to trick the computer into seeing less air flow in order to tune a car with bigger injectors correct?

So does that mean when I do a log and let's say my peak air flow is 21 lb/min, Is that the actuall air flow or am I actually flowing more but it reads lower since the computer is being tricked by my S-AFC?

 

[tom04841]

since it is between the maf and the ecu, you are logging an altered signal

 

[1990EclipseGSX]

You are not seeing actual airflow. Take the airflow you log, multiply by the percentage you are pulling out with the MAFT or AFC, and add that to the logged airflow for actual airflow.

 

[spyderturbo007]

That's actually not correct, 1990EclipseGSX. The log already reflects the correction, so you can can't use that number. You need to use a formula that accounts for that.


A / ( 1 - C) = Actual Airflow

where,

A = Peak airflow on logger

C = Correction factor in decimal form at rpm where peak airflow occurred.

Cheers!

 

[1990EclipseGSX]

That's actually not correct, 1990EclipseGSX. The log already reflects the correction, so you can can't use that number. You need to use a formula that accounts for that.


A / ( 1 - C) = Actual Airflow

where,

A = Peak airflow on logger

C = Correction factor in decimal form at rpm where peak airflow occurred.

Cheers!

Whoops! You are absolutely right. I don't know what I was thinking.