well , first of all i didn`t see a tuner all who told me are Z owners and dayno shops and mechanices , they said for the dayno befor the spacer it was rich ,after the spacer its unstable rich>lean>rich again
i only want to know for sure if the S-AFC will work fine for me or i should go with UTEC ? and can i do it my self or i must find a tuner ?? that all
i posted a thread in the Tune forum`s
https://my350z.com/forum/tuning/3764...tune-help.html
,,also nobody added any thing to me

 

 

Just use the Utec.

Dont bother with the SAFC.