For N2 raw starter, N2 starter rate and N2 starter max rate, the SDK states " Note that this value will only be considered if the starter_type is not of the “bleed air” type."
However, N2 raw starter, N2 starter rate and N2 starter max rate ONLY appear as options in the Aircraft Editor if starter_type IS selected as “bleed air” in the Aircraft Editor or manually in the engines.cfg.