Hi guys. Im new on this forum. My name is Asier and im a owner of a formula hillclimb car. This car have a BMW s1000rr byke engine with 1000cm3 with four cylinder of 80mm bore and 49,54mm stroke. The limit of rpm are 14200. Actually we are building a turbo configuration on this engine reducing the cylinder compresion ratio from 13:1 to 9,5:1, carrillo rods etc etc. The question is that we are going to go with the new GT25 550 garrett turbo and dont know if we are on right direction. Other byke engines with turbo usually here uses an EFR 6258 or the 6758. What did you think?