The Su-27 and its variants on the Seek and Destroy dev server are not accurate in capabilities and systems.
For starters, the J-11A has the wrong radar set. It should have the N001V or N001VE Mech radar, which actually has the capability to launch ARH missiles, instead of the N001 it currently has. I think it was also outfitted with the PL-8s and PL-12s but I could be wrong on that.
The Su-27SM’s N001VEP radar in game should have a detection range of about 150km in HDN mode, with a range setting of 200km (similar to the MiG-29SMT’s radar), and also an MTI function.