...but my Stage 1 exhausts are....101dB on Saturday....was under 90dB a few weeks ago at Loton Park
Strewth, that's quite a difference - any idea why?
I'm booked in for a 98dB day at Goodwood so hopefully mine will pass OK.
You simply cannot compare noise test results Chris - they're just so dependent upon so many factors, including angle and distance of measurement, revs, surroundings, weather and many other aspects.
I can't remember if you have MMC Stage-1 or G56, but if the latter, then I got through a Goodwood 98dB limit day last year without problems with G56 and they are more notorious than most for being Noise Grumps. They measured both sides and in truth I suspect at little more that 3750rpm or thereabouts. Passed all the same though!
My car on the stock pipes measured 104dB at Brands and 99dB at Castle Combe within days of eachother and when you consider that +/-3dB represents a doubling of sound pressure/volume, that's clearly wrong.
