Neither one of you is a fuckwit. There's just a world of differences in increments of progression of improvements in aircraft produced. Yeah, he's right, the V-1710-135 was used in the P-63 King Cobra. It's not just a single stage supercharger, it had that and a turbocharger. As you mentioned Soulezoo, politics (and ignorance) played a big part in not further developing more increase in power to gain performance. A lot with the V-1710. The P-37 was one of the original variants of what was to become the P-40. It had a supercharger, but it was canned as the War Department saw "no need" for it. People talk like the P-40 was a POS because it didn't have high altitude performance. It could have, but the powers that be shut it down without having any idea of what we really needed. Add to the fact the "Bomber Mafia" was in charge and shut down a LOT of good ideas, because they didn't think we needed it. Kind of ironic they got duped into thinking they were the 'schnitza' when in reality, the commanding generals of WWII used them as bait to draw German fighters up.
In any case, there is a world of information people need to look up before posting on what aircraft had what in WWII. Two of the best resources I've found are "Jane's: WWII Aircraft" and "JG26-Top Guns of the Luftwaffe" (chronological account of what was used where and what against). The JG-26 book also gives the German account of Robert S. Johnsons narrow escape from death from the German side. ("Thunderbolt")
Progress was made so fast in WWII, it just boggles the mind. We went from open cockpit 1000 hp engined aircraft to pressurized 3000 hp engined aircraft in that time. You really have to break down which variant you are talking about along with which engine it was fitted with.
Dropped to -37 around 630
