109 e4 performance

[Kwiatek]

C3 fuel was used only in Db601N engines not in DB601.

Also automatic prop pitch for 109 E didn't change its maximum speeds.

So i think all difference at sea level speed is in radiator settings and type of engine - Db601 A or DB601 Aa which had more power at the lower alts then 601A and surly difference in tested planes.