- Raleigh, North Carolina
Disagree on your observations, at least from the 1 person I know with a C6 ZR1 (admittedly a horrible sample size). He tracks it all the time, mainly at COTA, and has never had any cooling issues. From what I can tell it's widely known that the C6 ZR1 doesn't have cooling issues but the C7 Z06 does. Chevy really messed up with that specific model.1. Yes and no.
Before I bought it, I asked around the paddock C6 ZR1 owners whether they have heat issues. I was told to rest assured, it's not a problem. C6 ZR1 cooling is nearly identical to C7 Z06, and power output is nearly identical. What I realized after the purchase is that most drive parade laps, or don't talk about the shortcomings of their car, but mostly parade laps. You can drive these 20 seconds a lap of pace side by side with Miatas and they cool just fine. You can also drive warm up lap, a good pace hot lap, cool down lap and they do alright as well.
You can make engines reliable for very long periods of time on track, takes proper design. And I say that as someone that blew up a Porsche engine (from oil starvation) despite taking all the published starvation precautions. And I was on street tires. (So kiss my a** Porsche, never again).