The Spit pilots learned very quickly to go inverted when trying to dive onto the Hun 109s, and eventually a lady engineer worked out a type of washer with a special hole in it fitted into the floatchamber cured the neg g on the big carbs!
After that the Hun became very cautious for when in a dive the Spit could easily outdive the 109 which started to pull its wings off when trying to pull out from such high speed dives, the Spit however had no such trouble.
Peter R-B