XFI O2 Corrections

[Boost231]

i was wondering is it hurting performance when the XFI is pulling or adding fuel? i know ideal would be 0 correction but what if it is running a solid +10/-10 correction? is this hurting performance over having it at 0 correction? i hope that makes since. just wondering as i have a few ideas in my head

 

[HighPSI]

It is hurting performance to some extent. The O2 correction is based on what the O2 sensor "sees". It can't react instantly, so you will get rich/lean spots in your tune-up. It is much more pronounced when the AE fueling is incorrect.