Hey now Robi lets play nice, you know as well as anybody that there are a million variables that affect lap time. Now on paper your car should be faster than mine especially at a track like Buttonwillow. Your car is ~250 lbs. lighter than mine. Your driver is probably another 50 lbs. lighter than me. Your driver is Leh Keen, current Grand-Am Rolex Sports Car Series champion. Your car has front and rear aero. Your car had fresh tires. The only thing my car had on you is a set of intakes, an oil cooler, and a diff.
Now I will admit that my car made a poor showing with a 2:04 lap time. Hell I ran a 2:05 back in March with a completey stock car with just coilovers, intakes, and high flow cats. My car should have been much faster but the setup on it was terrible and since I was driving two cars at the event I will admit that the Z got neglected. I think I only took it out for maybe 6 total laps throughout the entire day so I didn't spend a whole lot of time sorting out the handling issues.
That being said both of our cars I am sure can be much faster. If I had the time to mess with alignment and sway bar settings and a fresh set of NT05s I am more than confident I could have been within a second of your car, however your car should be at least 3 seconds faster with the aero, weight reduction, and your secret weapon driver.
So hopefully this weekend at the Redline Finals I can get my car sorted out more and since RTA doesn't allow pro drivers in the Street class we can have a little more of a fair comparison.
My point of all of this is, implying that your KWs are so much faster than the BCs is in my opinion a little off base. Up for a coilover shootout?