Simple SAFC question....

[4BangerV8Killer]

When tuning with the safc.....the more i go into the negative in percent, the richer or leaner im making it?

Right now i was under the impression that when i go further negative im adding fuel and pulling timing. Right or wrong?

So when i see knock i go down in percent/more negative.

Or do i have this backwards?

 

[1GawdJunkie]

I know this has been beaten to death. Anyway AFC affects the air the ECU sees. Less air (negative number) the ecu will send less fuel the higher the number (the more air) or as you get closer to zero and above the more fuel the computer will send. Hope this helps

 

[4BangerV8Killer]

so if i wanted to get rid of some knock id be going up in values riiiggghhhtttt??

and more fuel means less timing right?

 

[wimploki]

check the Tech/DIY

or this link - http://www.dsmtuners.com/forums/showthread.php?t=58403

good luck

 

[spyderturbo007]

Moving the SAFC in the negative direction drops the frequency delivered by the MAS before it reaches the ECU. This results in a lower airflow value, which corresponds to a reduction in fuel delivery and an increase in timing. The opposite is true when moving in the positive direction.

So, move further negative and you remove fuel, more positive and you are adding fuel.