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Old 08-06-2012, 09:03 PM   #198 (permalink)
bullitt5897
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Originally Posted by cavemancan View Post
I believe our goals are completely different and no disrespect implied but just because you don't do it with 1000rwHP (jealous lol) does not mean its right. I hardly think 1000rwHP is right on a road course let alone an autocross LMAO...But it would be a blast! I ran 275/35/18's in a square setup on my old Rx8 and it killed in autocross on a car with much less power than the Z.

While I am not going square with this setup I am trying to stay close to it. Eventually I may buy 2 rims that will allow me to stay square so I can autocross and road course. In other words just swap the rears...staggered on the street and square on the track.

The Z has far more weight in front in compareson to my old Rx8...I can feel the lack of traction up front when pushing this car in stock form. It obviously needs more negative camber up front but a bigger tire would work wonders also.
The reason I ask is that under stock or near stock power levels the more rubber up front i.e. 295+ your going to run into under steering problems especially if you don't add more aggressive camber to allow you to fully utilize the 295 series tire while turning. I have seen aggressive setups like you are wanting but most of them run 275's up front and run almost -3* of camber as well. The most aggressive I have seen was a 285 square setup... I would recommend max 285 up front even at this width your going to add a lot more rotational mass and very possibly over-cook your brakes...
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