The D-12, example with Jumo-213EB, was to have top speed of 770 km/h at 9,5 km, fuel as usual for D-9. The D-12, with Jumo-213E, was good for 720 km/h at 9,7 km. Numbers from the FW graph, not sure was it ever tested with EB engine.
A good data about the Jumo-213EB is appreciated
A good data about the Jumo-213EB is appreciated