I just purchased a spec miata and am planning to run it in NASA HPDE at Autobahn this weekend (7/22-7/23). The car has a Dynaflow muffler and I would classify it as fairly loud. However, I'm new to this racing game and don't have a feel for how loud 105dB is. Just wondering if I should be concerned.
Car #: 08
Year : 95 Posts: 644
105 dB would be akin to Toyota Atlantic or other high revving pure race engines. Its not impossible for a street engine to get there, but its probably rare. I have seen SM's at 100dB many times and every now and then at 102-3dB. Having done Sound Control at a dozen or so races I would tell you that you are gonna be just fine with the dynaflow muffler. As always though YMMV.