[spaparizos]

I think you have the 6 inch lss which is the recommended size for 195-50-16 Toyo r888 I believe. I would look into alignment, suspension and sway bar settings before changing rims. Keep in mind that if you setup the car well for slow corners like autocross, it could be a handful in fast corners, ie track.

I found under steer with the stock ad07s challenging during autocross. But it is a good opportunity to learn trail braking. Wider rims and tires don't need that as much.

 

[spaparizos]

Another suggestion, given your location, join gglc autox events in the spring. Very humbling and educational to see people with similar cars going much faster. Also lots of nice people to talk to and catch a ride in the afternoon. Not really that competitive. I know this does not answer your setup question, but i found the events fun and useful so i thought i throw it out there