In the two weeks since then, they've done a "wet dress rehearsal" and two short (~3 second) static test firings of the Raptor engine (first and second). Then they pulled that Raptor engine off SN4 and did another cryo pressure-proof test that was done to higher pressures than the previous test: 7.5 bar (110 psi) versus the 4.9 bar test from two weeks ago.
Today we learn that they replaced the engine today, with a second Raptor engine, serial number 20, seen here. Because that's a new Raptor, there will be a first static test of that engine, currently looking like it will be May 13th, with a test window open from 9am to 9pm CDT (UTC-5). Backup days for road closures and such are the next two days.
What's that up there? The world's highest thrust per buck rocket engine, being driven down a beach road by a fork lift? Must be Boca Chica and SpaceX. That was yesterday morning. Taking a look at the live video feed just now it seems like the engine has been mounted.
Final words to Teslarati, with one modification.
If that static fire and included wet dress rehearsal (WDR) is successful, Starship will technically be cleared for flight. The only obvious missing piece is an attitude control system (ACS). Starhopper, for example, used cold nitrogen gas thrusters quite literally taken off of flight-proven Falcon boosters. It remains to be seen if SpaceX will take the same approach with Starship SN4 or if a different kind of ACS thruster is already installed on the rocket and hidden in plain sight. For now, it looks like we won’t have to wait long at all to find out.Instead of "If that static fire and ..." is successful, I'll say "When that static fire..." is successful. After watching them for these last several months, they are nothing if not relentless. If the tests don't go well, they'll keep working until the tests pass. Starship SN5 is almost ready to roll to a test stand now. Construction on SN6 has started as well.