This lap: 1:52.279 (best in eight attempts), no assists, stock car setup.

laFerrari 1:52.735
P1: 1:52.228

Just an observation, in non technical tracks, laFerrari is usually the fastest, not here though!

AC runs at 25 FPS while hot lapping maxed out, at 1680*1050.

Current System and Software:

Intel® Core™ i5-4690 (6M Cache, 4 x 3.5 GHz, 3.9 GHz with Turbo)
MSI® Z97 Guard-Pro
Kingston® 16 GB (2 x KVR16N11/8)
Gigabyte® AMD® Radeon™ R7 370 (GV-R737WF2OC-2GD)
Transcend® TS256GSSD370S 256 GB
Seagate® Barracuda™ 7200 rpm 1 TB
Realtek® ALC892
HP® LA2205wg
A4Tech® N-500F
Dell® RT7D60
Corsair® VS 550
APC 1.5 KVA UPS (as backup power)
Windows® 8.1™ Pro 64 bit