Thanks to Austin for this one:
Su-33 To Begin 2nd Phase of Upgrade While Russia Mulls Carrier Options
“With the first phase of the modernization now complete, we are preparing for the second phase, centering on higher engine thrust, improved detection system, and the like so as to make the Su-33 a truly multi-role aircraft,” Major General Igor Kozhin, chief for aviation with the Russian navy, told journalists. This effort may not apply to all surviving aircraft and rather involve only those airframes that have sufficient lifetime remaining, so as to keep them operational until 2025, he clarified.
Reportedly, the modernization plan also calls for secure data exchange in real time between the Su-33 and MiG-29K/KUB fighters. For cost-efficiency, the aged aircraft is likely to retain its original N-001 Mech radar, but its functionality will be extended through technology insertions already tested on similar equipment in Russian Air and Space Force Su-27SM3 and Su-30M2 aircraft. That includes the ability to engage two aerial targets simultaneously with radar-guided missiles, as well as ground-mapping.
The Russian navy received about 30 Su-33s before production terminated in 1999. Up to 20 of them have undergone the “first phase” of the modernization at the Sukhoi manufacturing plant in Komsomolsk-upon-Amur, and Aircraft Repair Plant no. 20 in Pushkino. They feature satellite-aided navigation, a new radar warning receiver, and the SVP-24-33 computing system for accurate strikes with free-fall bombs. The second phase of the upgrade extends the Su-33’s arsenal through the addition of precision-guided munitions.
The original Su-33 is powered by two AL-31F Series 03 turbofans each developing 28,220 pounds (125.6 kN) of thrust in full afterburner. New engines will provide 29,760 pounds of thrust, as well as burn less fuel with an extended time between overhaul and lifetime through the replacement of the analog control system by a digital one. Higher thrust will enable the Su-33 to perform ski-ramp takeoffs from Kuznetsov at a higher gross weight.