Phil 997 said:
Max 100% correct, I have a full cargraphic performance exhaust and its measured at 133.9db and they were not happy about it at Spa :grin: :grin: :grin:
Cheers Phil. 134db is just badass. I have no idea what my 3.8 produces, as I've only ever driven on unrestricted circuits. Not as much as some of the other cars to be frank.
We do have here in Finland a pretty low noise threshhold at Ahvenisto, because it's an old circuit on the edge of a town called Hameenlinna: 95bd at 1m with the microphone held 45degrees from the exhaust at 4000rpm or some such. It's easy enough to pass as a static test, steady throttle. (You may have seen Ahvenisto on Top Gear as it was the circuit that James May visited with Mika Hà¤kkinen.)
My old R53 MINI with a John Cooper Motorsports MINI Challenge 4-2-1 manifold and John Cooper Works catback (no centre silencer) passes the 95db static test, but on the straight, when under load, the car makes a lot of old skool 60's racekar tyre noise (a nice combination of screaming supercharger and wide bore mani), and would probably fail a drive by test ... :grin:
I'll have to link to YouTube as mp4s are not allowed:
https://www.youtube.com/watch?v=pRbYMeiZk1U
Do note that this tiny clip was recorded on a phone ... it would have been better with a GoPro and a real microphone, and if I'd driven next to the wall.