I just won the Daytona race using the Eagle Talon at 390pp. Total time was 5:08.51 with a margin of victory of .180. I took the lead halfway through lap 4 but the other guy stayed with me until the end. Got an extra 261,360 credits for the performance difference bonus.
I just added the fully adjustable suspension, all weight reduction, ECU and I believe all 3 stages of engine upgrade. Then dialed it back to 390 with the power limiter. Didn't do any suspension tuning or anything.
Also won pretty easily at the Autumn Ring as well but I think the pp was around 414 or something. I forgot to set it first