No need to D-tune anything. You will get the added fuel that you need via the fuel rail/fuel solniod. Most guys tune there nitrous shot via the pull pill. If they are pig rich while spraying the will go do a smaller fuel jet.supermech21 said:
If I had a SAFC I would make a setting for non nitrous tune. Then I would set the SAFC back to stock settings and pull any extra fuel via the fuel jet for my nitrous setting.