Between the two threads you started yesterday you could get a lot of help if you posted more details on your car(I couldn’t find a build thread). Here in forced induction we need your engine build specs, what turbo, hot side pipe size etc. We can help get you boost sooner or later if that’s what you need. The guys over in the racing forum need info like your tire size and type, suspension setup(front and rear) to help you out. With that they can help get your car to hook, and they’re very knowledgeable in that area.
I do not see a reason to change your rear gears; 3.55’s will work just fine. Spend your money elsewhere.
