Thanks for the thorough answer.
The R-1820-70W would be an interesting thing to have - the 1350 HP maybe up to 25000 ft (hence the 340 mph at 26400 ft)? The "W" means the engine is equipped with water injection kit. Now the F4F with an 1900 HP (at low level, but still) R-2600 would've been a baby F8F.
(ducks for cover)
The R-1820-70W would be an interesting thing to have - the 1350 HP maybe up to 25000 ft (hence the 340 mph at 26400 ft)? The "W" means the engine is equipped with water injection kit. Now the F4F with an 1900 HP (at low level, but still) R-2600 would've been a baby F8F.
(ducks for cover)