If you move up to a bigger wheel size, consider the added weight of the rim and tire. More unsprung weight is bad for handling. There are not an unlimited list of choices for 14" tires, but enough to keep you happy. Remember, the tire technology currently available far outstrips the technology from 30 years ago, so almost any good to above average summer performance tire will do (the S30 is not a performance dynamo in stock configuration.) I concur with what Mr Coffey said. 195/60 R14s for track. Good performance, good grip, less expensive, lighter, and dropping your AR to 60 will effectively improve your final drive ratio for some extra pep off the line.