Firebird actually has some small roadcourses on its property. Bondurant uses the courses and there are a number of motorcycle track days. This AZMSP is supposed to be a much nicer facility and track layout than Firebird.
What's funny is it's right next to Luke AFB with F-16's flying around all the time which aren't exactly quiet. I'm north of there and they shake my house sometimes at the end of the day coming if for landing.
I had the same thought about the noise requirement excluding a lot of our cars. How loud does a car have to be to be below 94 dB from 50 ft away?
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Erik
69 Camaro
Several other things with wheels and engines