Quote:
Originally Posted by zvovchik
just got a 99 boxster, want to run square. everything is stock, best way to try square is disconnect rear sway yes? i want to try toyo ra1. to get ultimate grrrripp hehe.
i have stock sized staggered michelin as/3 now and like them a lot, thinking to run square ra1 for autocross and track next year. any recomendations would be very welcome.
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Boxster's are designed with inherent understeer. Most owners increase the front tire width from the stock 205 to 225 to reduce understeer. 235 is even better.
However, if you go the next step and install 255's up front, the car typically goes from natural understeer to natural oversteer (because now the front has a lot more grip). This won't be an issue while driving around town at normal speeds, but crank it into a freeway on-ramp with a set of RA-1's or take it to an autocross and at the limit the rear end is going to be loose.
Thus, most owners who go square install adjustable coilovers, adj drop links, and adj sway bars so the handling can be adjusted back to neutral (or however the owner likes it best).
If you wanted to try going square on the stock suspension, then yes, disconnect the rear sway bar and set front tire pressure slightly lower than the rear tire pressure. The car should still exhibit quite a bit of oversteer so be prepared to react accordingly.