I am one of the many Z owners, with SUs, that has battled a lean condition on hard acceleration, or WOT.  My idle and cruise AFR readings (have AFM attached to header) are great at 14.5 or so, so have adjusted it as best as i could.  Along with SM needles, I adjusted fuel levels and tried to do anything I could think of to resolve this issue, to no avail.  I even switched to triple Webers, which allowed me to see how my car could really perform with appropriate AFR!  I decided to switch back to