FWIW: second hand / unreliable data...
I have seen several gen 2 cars at streets of willow. A good driver, with what he claimed was an "as delivered" car (casual glance - it was stock tires/wheels, and no obvious camber) was claiming 1:27. I don't think he was exaggerating. CSGmike on this forum has not posted numbers, but has posted videos that seem to support this level of performance.
1:28 with a passenger:
There was another video on youtube claiming 1:23 but with tires/suspension mods