I couldn't be happier with the performance. I think a few things are in play that make it exceptional. First, is the weight. Second, is the engine work by Benchmark Performance. Chris and the guys at Benchmark built an awesome engine, exactly what I asked for.
The other major factor in the performance, in my opinion, is the balance. I couldn't get over how well this thing cornered - significantly better than my 2012 car, which is a normal two-seater. The cornering is significantly better than I expected, which is probably due to the more balance front to rear. More weight on the front end should plant the tires better for short course/tight turns.
I also removed almost all of the "bump steer" when I had built the steering rack. I doubt that's coming into play here, but could be.
All in all, I couldn't be happier with the car. It's significantly better than I expected it to be.
-b