Nice time. The Ring regression work predicts 7:57 based solely on power to weight. The M3 prediction is 8:04 (actual 8:05).
Good observation about the roll cage. This may or may not be a standard at the Ring for testing production vehicles. Safety first! If so it is all fair. Either way such a structure significantly stiffens the chassis and would produce a measureable benefit.
Lastly do note this is a top notch race driver with some accolades under his belt. Horst's Sportauto time, which for better or worse has become the benchmark, will clearly be quite a bit slower. Notice how BMW does not quote the times they have obtained with their own drivers. I'd love to hear the number for the DCT car with such a driver.
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