hey guys n maybe gals.... i've recently recieved my new gt35r but have been wondering about whether or not increasing my compressor wheel to 66mm will be of any benifit to me, see the reason i question it is my hp target is between 450hp-500hp at the wheels but im not after anymore than that as engine may not handle the power, i have spoken to the turbo place who i got it from and they believe that the upgrade is not neccassary for the power im after, also increasing to the 66mm compressor wheel would make the turbo abit lazier as it requires more shaft energy to spin it... the ONLY reason i was looking at the upgrade really was to try make the power with not such a hi boost level (25psi or around about) if upsizing comp wheel was going to help me achieve that power at a lower boost level then i would do it, otherwise i will leave turbo as it is....your thoughts>?????