Taken from S2Ki.com and TrackHQ.com - here are some times of slightly modified S2000s and an NSX or two with pretty good drivers. Almost all of these cars have not much more than larger tires, brake pads, rotors, suspension, and wings
Buttonwillow Config #13CW
1:59.3 - S2000; 255/255 NT01; 200whp/2850lbs w/driver - Wing, KW V3
2:00.9 - S2000; 255/255 NT01; 200whp - Wing, Exhaust, Tein SRC
2:00.9 - S2000; 255/255 NT01; 200whp - High-mount APR GT200 Wing, Carbotech XP10/XP8, KW V3, J's 60RS, Stock header/cat
2:02.1 - S2000; 225/255 Federal 595RS-R; 200whp/3000lbs - J's Type 1 Wing, ASM lip & canards, KW Clubsport,exhaust, PMU racing999 pads
2:03.0. - '91 NSX; 235/275 R888; 266whp/3025lbs w/driver - Brembo "Lotus" front brakes, PFC 01 pads, CT headers, Taitec exhaust, Penske double adjustable coilover, JAPANESE GEARS
2:05.9 - S2000; 225/255 NT01; 193whp/2950lbs - camber kit, Endless SS Lines, K&N Drop-In Filter, Carbotech XP10, Motul RBF600, Recaro SPG on Taitec Rails, High-Flow Cat.
2:06.4 - S2000; 235/255 Federal 595 RS-R; 200whp/3000lbs - Tein SRC, Endless BBK, 4.44 gears
Willow Springs International Raceway (Big Willow):
1:30.0 - Porsche GT3 (997) 235/305 R888 - modified wing element, Moton Clubsports
1:33.8 - S2000; 255/255 NT01; 240hp/2880lbs - Voltex Wing, exhaust, racing seat, KW V3, FXMD Spring rates
~1:34.0 - '91 NSX; 235/275 R888; 266whp/3025lbs w/driver - Brembo "Lotus" front brakes, PFC 01 pads, CT headers, Taitec exhaust, Penske double adjustable coilover, JAPANESE GEARS
1:35.3 - S2000; 255/255 Dunlop Starspec; 195whp/3040lbs - GT200 Wing, stock suspension
1:36.1 - '91 NSX; 235/275 R888; 266whp/3025lbs w/driver - Brembo "Lotus" front brakes, PFC 01 pads, CT headers, Taitec exhaust, Penske double adjustable coilover, JAPANESE GEARS
1:38.4 - S2000; BONE STOCK down to the tire
Even an NSX with a aftermarket front brake system, similar suspension/tire mods, no wing, AND the short gears, is still not clearly dominant on track over an S2000 (with light modifications). The S2000 still has a shorter gear ratio than an NSX with short gears, which keeps it in its peaky powerband better on track. Being able to stuff such a large tire under its fender, and the improvement a wing does on that platform makes the S2000 a formidable track car.
Billy