that's terrific... VIR 2013 records are below... TTB looks like a good place to be. I'll be running TT2 but last time out I was 5 seconds off that pace - I can probably find 2-4 seconds but I won't be beating that # this year most likely. TT2/3 are based upon power to weight ratios, but TT3 has some aero restrictions you'll want to check out. Scroll to bottom of this page and check out the TT classing rules if you haven't already
NASA Class and Series Rules - National Auto Sport Association - nasaproracing.com
TT2 2:04.631 2/17/2013 Joe Mulholand Chevrolet Corvette
TT3 2:06.771 2/17/2013 Olivier Raoust BMW M3
TTA 2:01.525 10/13/2012 Mark Nunnally Chevrolet Corvette Z06
TTB 2:08.320 3/27/2010 Eric Wong BMW M3
TTC 2:11.056 10/9/2011 Scott Blair BMW M3