Raptor 3

Raptor 2 had 300 bar in the chamber. SpaceX are now pondering 350.

Reddit is calculating 1.77 thrust to weight ratio if the 33 Raptors in the Superheavy are all upgraded to v. 3, for 8877 ton[ne]s total. (Those would be French units; 19.57 million pounds in Freedom units. Elon rounded down for those.)

Musk admits: we did not expect the engine to survive a full duration run at that pressure. It is uncharted territory. and Raptor chamber wall might have the highest heat flux of anything ever made

As noted, Boca are really going to need to upgrade Stage Zero, to take that heat and pressure.