If you wanted an example of a utilitarian Audi, look no further than Stan Liu and his 2001 S4. Stan's car pulls triple duty, serving as an active competitor in SCCA Solo II, an instructor car during Audi Club events and as Stan's daily driver. Stan's company, Topspin Design, began by making parts for the golf industry but has recently focused its attention fabricating parts for the racing industry. A Topspin mini-cam was installed on the nose of Stan's S4 and provided an outstanding video of his car in action. The footage was both clear and very smooth, devoid of the jumpiness usually seen during in-car video. The Topspin car also included its proprietary, four-point racing harnesses and carbon-fiber shoulder harness bracket, nicely engineered parts that are easily removable during street use.
Although the setup of Stan's car netted him several wins during the Solo II championship, it did not lend itself well to our venue. The car was great fun on the road course with its tail-out handling bias, but it did not make for the quickest way around a track. Moreover, the tires were in terrible shape, which could also explain why Stan's huge Brembo F50 brakes did not work as well as expected. Stan's tire sponsor, Falken Tire, asked him to finish off an older set of its basic street tuner tires, rather than mounting new Azenis Sports, for this event. A simple tire change would have made a huge difference in scoring-this car had the horsepower to do better.
2001 Audi S4
APR Bi-pipe intake, Magnaflow cat-back dual exhaust, Mocal oil cooler
Engine Management Modifications
B&M shifter, Clutch Masters aluminum flywheel and FX400 clutch disc
Front: Stasis Track Sport coilovers, adjustable upper control arms
Rear: Stasis Track Sport coilovers, modified anti-roll bar with Neuspeed reinforced bracket
Front: Brembo F50 caliper, 355mm rotors, braided stainless-steel lines, Pagid Orange pads, Motul RBF600 fluid
Rear: Brembo 328mm rotors, braided stainless-steel lines, Pagid Orange pads, Motul RBF600 fluid
17x8.5-in. SSR Competition
255/40-17 Falken FK-451