1.58ata / 1.65ata was not cleared until July '44 for fighter varients of
the FW-190A. Only Jabo-einstatz's could use the higher boost pressure
and only below 1 Km altitude before then begining with the FW-190A5
jabo-einstatz's varients.
An FW-190A5/U8 using 1.58ata could get roughly 1870 PS at 1st Gear FTH.
A July '44 FW-190A8 was getting 2100 PS out of the same boost pressure.
The FW-190A5 was never cleared for 1.58ata above 1Km. The chart I posted is
decieving and represents the prototype FW-190A8.
FW-190A5/A6/A7's were all out of production by the time "Special Emergency
Power for Fighters" was cleared in July '44. This was a completely different
boost system from C3 "Emergency Power" and used different fittings. It worked
on a similar principal and used C3 fuel to cool the charge, however.
Only the BMW 801D2Q in the mid production FW-190A8 developed 2050hp. The early
FW-190A8 and mid-1943 BMW801D2 developed 1900PS or around 1850 hp at 1.58ata.
Only the FW-190A8 recieved the BMW 801D2Q motor which brought the output up to
2050hp in Feb '44. The BMW 801D2 output was 1900PS @ 1.58ata at 2700U/min.
This means all the jabos only developed 1900PS as well or around 1850hp.
As stated earlier it is possible that some older recieved the engine upgrade
but not likely. These would have been late war aircraft and most likely would
have been factory upgraded through the airframe reclaimation program to FW-190A8/A9
standards. The airframe would have been sent back to the factory to have the
"Zusatzskraftstoffbeholter im rumpf" hatch/ fitting block, universal wiring harness,
intakes, etc of the FW-190A8/A9 airframe installed.
The FW-190F8/F9 on display at the NASM is a great example. IIRC It began life as an
FW-190A6 and was factory rebuilt as an FW-190F8. Later it recieved the BMW-801TS
power egg bringing it to FW-190F9 standards.
The BMW801TS motor was cleared for 1.78ata/1.82ata and developed over 2200hp.