Markus
Banned
Estimate on performance improvement with the larger engine?
Per CalBear part of modernization would be increased range would assume.
In OTL half of Lex´s TBD were armed with bombs as it was uncertain if the plane could fly over the Own Stanley range in New Guinea with a 2000lb fish. With an engine that generates up to 1/3 more power all TDB would have been armed with torpedoes thus significantly increasing the japanese losses on 10 March 1942. Speed would increase too, no idea to what degree.
You would certainly need to increase the size of the fuel tanks to compensate for the thirstier engine. IIRC the TDB had a range similar to an F4F and since sending in bombers unescorted was not navy policy, more range is not needed.