Club racing a 924-S

[Racer-X]

Want to start club racing and autocrossing my 924-S. Has K&N filter, all new brakes, new muffler, and 951-S Sway bars. I want to run some better tires, maybe slightly wider in back??? What's the widest, safe size I can put on. It runs real nice now with 205-60's. I was thinking of going 225-55 in the rear and 215-55 or -50 in the front. I was thinking of running the Dunlop SP series with the assymetric tread. Also, was going to put a roll cage in for stiffness. Will this really help a lot and what does that do for street-legal-ness having a cage??? One more thing, is there a wat to adjest ride height in the front with the stock springs? There's an article about another 924-S where they mention having the "factory coil over struts resting on the next to lowest threads" and I'm not sure what they mean here????? Thanks in advance for any help on this!!! Brian "Racer-X" Morgan