What would be the specs for the idealy matched turbo for a 4.6? I plan to build a 100% custom turbo and would like to know what the specs would be on the turbines to make the perfect turbo for my car. Don't tell me about how hard it will be and how it is better to just buy a turbo I have all the tools that I will ever need and people that will help me along the way. The tools that I have are: HAAS VF3SS and a HAAS SL20 so dont preach to me about them either. Sorry to be on so much of a defence but I feel that I would be bombarded with statements on how it cant be done and other comments of that nature.