SAFC question

[blueavlo]

been helping my friend tune his car and adjusting his SAFC.. im finally getting him to where his wideband is showing like 10.5ishs (which i know still isnt that good.. but is a far cry from what he was running). Anywho.. my question is: when adjusting his safc to get him where he is now, ive had to put basically all of the corrections into the -40+ range and im getting to where im afraid / wont be able to adjust anymore. is this normal?

 

[donniekak]

What size are the injectors?

 

[blueavlo]

i believe he is running 660cc or something in that very near neighborhood

 

[donniekak]

Those are about the maximum size injectors you can run with that unit. The corrections are going to be at the edge of its range.

 

[blueavlo]

okay awesome. pretty sure he isnt running an afpr either.. which is probably causing me to have to lean it out even more than i need to.

 

[BoostFrenzy]

What kind of turbo setup and how much boost?

It may very well be that the injectors are too large for that setup and that much fuel really does need to be pulled out. The only thing about pulling that much, is that it messes with how much air the ECU is seeing and makes your timing go crazy because it's jumping to a different load map.

Edit: damn phone is too slow

 

[blueavlo]

big16g running around 18-19psi, 660cc injectors, a walbro 255....

 

[AWD-TSI]

i Had a similar set up just more boost and RC 550's. I was running pig rich( -50 %), and people began to ask me if my car was a diesel. so i got a Aeromotive AFPR and that did the trick. My factory fpr couldn't handle the pressure that the 255 was puttin out.

 

[whiteflash]

I was running pig rich( -50 %)

Wouldn't -50 on an SAFC be really lean?

 

[95redturboawd]

Yeah you definitely need an AFPR for that 255.

 

[blueavlo]

yeah i told him an AFPR would definately make things easier.