I use this as my cash cow, specifically Daytona. My 8 year-old nephew rocks out Daytona for a cool $300,000 by lap 2. By a 92 Del Sol SiR. Max build and lighten, but no aero necessary. You need the power. It's worth rebuilding both the chassis and motor; very cheap at around. $13,500 total for both and you yield much more in rewards.
My settings are: lightened to 936kg, no aero, all associated racing part bolt-ons and de-tune to 85.8% power to stay at 430PP, will leave you around 222 bhp @ 7,700; 157 ft-lb. @ 7,400. You need to Live in VTec. Tranny I always shorten my top two gear ratios in restricted-PP races so you can dig through and catch-up even though you're under-powered (also helps when drafting); top speed varies but I stick with 193mph. LSD 60-60-60. Suspension (most of these are conservative due to sports tires): -6 Fr/-4 Rr ride height, 14.0 Fr/15.0 Rr spring rate, 8/10 on both dampers, 7 both ARB. 2.8 degrees camber both front and rear, I never touch Toe Settings. Max both brakes and love the cash. I've de-tuned down to 415PP and still won most races by Lap 3.