people that have done this and still use your car as a street car, what did you do about your speedo? is there away to make it read right still? how far will it be out?? any idea what the top speed of that ratio would be in a r32 gtr, i geting 240klms down the eastern creek now, with only 300kw. i was thinking of changing my raitios when my motor is out, but i dont want to run out of legs on the track with 400kw