Unfortunately I am unable to spend the time searching right now due to recent events.
However as suggested above - call Mark at Abbey Motorsport as he has dyno'd numerous cars pre and post mods.
My original source of the information was the boss of ESR. Unfortunately following a serious illness he is barely a shell of his former self, and doesn't even remember he owned one of the most popular performance garaged in the North East, never mind specific details about cars he worked with.