Fw 190A-8 December 1943.
The FW-190A8 was not cleared for 1.58ata/1.65ata in the "special emergency power for fighters" until July'44.
That same month the RLM directed the JG's to begin changing power eggs in the FW-190A8 to either the Hybrid BMW 801TH or the BMW 801TS. This brings them up to FW-190A9 standards. All FW-190A8/R11's produced had the BMW801TS motor installed.
There is some conflicting information on the name change. Some of the reference reports are at the translator at this time but the one document I have here says:
The designation will remain FW-190A8.
The FW-190A9 mounted all 4 801 motors as well. The BMW801D2Q became a "backfill" motor that was installed if the others were not available. It was replaced when they the others came on hand.
Great Post Wotan.
Crumpp