Comparison between the SAFC 2 & SAFC
Old SAFC
Air correction factor setting point - Option 8 point option
Air revision engine rpm setting - 500rpm to cut
New SAFC 2
Air correction factor setting point - Option 12 point
Air revision engine rpm setting - 200rpm to cut
Drive voltage stabilization of circuit precision - improvement of air flow signal
Monitor indication optimization - designated item (air flow * pressure) indication
Knocking level Monitor
New monitor picture (digital analyzer indication)
Setting data of 2 patterns memory
Correction bypass function
Warning function
Password lock function
See here for more details
http://www.dpmotorsport.com/parts/apex/safc2.htm