White Noise!
- Thread starter Guest
- Start date
Any of the places u can get an SVA .................OR nip down to Good wood and ask nicely ! What u got to seperate is static and drive by test .ie Donni do it from the gantry at drive by..............my rs clusport gets 103 static but something around 90 drive by flat out ! The turbo is 101 static but abt 102/3 flat out ............now apparently Brands are testing static for the GP circuit but no mikes out in the country [ like Goodwood ] I just forget Castle Coombe and short shift at Goodwood ........................are thes race circuits or old folks homes ? We all know the planes landing at Donni and Good wood and the grass being cut make more noise then our cars
Also be wary of different circuits having different equipement and testers - my car has registered a different reading every time I have been to a track and measured static. They may not take what you give them as test results if their equipment tells them otherwise so you still wouldn't get on track. I would suggest going to Castle Coombe and asking them nicely - if you pass their test, you will pass anywhere. Drive by is much less of a problem unless your car is seriously loud (hi Richard).
James
when doing static test be very nice & chatty to the marshal doing the testing - they will often allow a bit of leeway as a 911 with the engine at the back will be louder than a front engined car which they are often aware of. I was also told to put the clutch in when revving the engine to stop the additional rattling and grinding you get from the RS when not in gear - dunno if it makes too much difference. some of the less ethical people I know may also not rev the engine as high as requested [
] so keeping noise down further...Alternatively get a mate to join you in his company car - you can always take that on track if the RS fails...
Putting foot on clutch saves about a decibel.
I've got a 'Tudor mortar' that bolts on instead of the tailpipe from Merlin at Combe, worth 2-4dbs. Anybody welcome to try this, as surplus to needs since I've fitted the C2 back box, now about 100db...
The noise test will change depending on angle of mic, ambient conditions, air pressure and temp and cloudbase, also proximity of buildings and road surface.
I got around this at Bedford once by them measuring the car on the trailer, with the exhuast some 2' above ground level!!
I've got a 'Tudor mortar' that bolts on instead of the tailpipe from Merlin at Combe, worth 2-4dbs. Anybody welcome to try this, as surplus to needs since I've fitted the C2 back box, now about 100db...
The noise test will change depending on angle of mic, ambient conditions, air pressure and temp and cloudbase, also proximity of buildings and road surface.
I got around this at Bedford once by them measuring the car on the trailer, with the exhuast some 2' above ground level!!
From the easytrack site:
"How are cars tested for noise and will my car pass the noise tests?
The vast majority of tracks in the UK have noise limits imposed on them by their local councils. These limits vary from track to track and some tracks have several different limits. The limit for each event is displayed in the event detail boxes. They are generally measured in the same way. A noise meter is placed at a 45 degree angle to the exhaust outlet and 50cm away *. The car is then held at 3/4 of its maximum rev limit and the highest reading recorded is the cars recorded noise output for the day. If a car is over the official limit, the car will not be allowed onto the circuit. easyTRACK will have no part in this process or a say in its outcome. If you do not know what the noise output of your car is, as a general guide most standard road cars will record lower than 98db (the strictest enforced at any of the venues used by us), indeed many sports exhaust systems will also, but may reach 102-3db. However, if in doubt get the car tested prior to booking an event, you are welcome to visit any event of ours for a test. If your car is too loud for a particular track, fear not, we can hire you extra silencing equipment (subject to availability). "
*75cm at some tracks
"How are cars tested for noise and will my car pass the noise tests?
The vast majority of tracks in the UK have noise limits imposed on them by their local councils. These limits vary from track to track and some tracks have several different limits. The limit for each event is displayed in the event detail boxes. They are generally measured in the same way. A noise meter is placed at a 45 degree angle to the exhaust outlet and 50cm away *. The car is then held at 3/4 of its maximum rev limit and the highest reading recorded is the cars recorded noise output for the day. If a car is over the official limit, the car will not be allowed onto the circuit. easyTRACK will have no part in this process or a say in its outcome. If you do not know what the noise output of your car is, as a general guide most standard road cars will record lower than 98db (the strictest enforced at any of the venues used by us), indeed many sports exhaust systems will also, but may reach 102-3db. However, if in doubt get the car tested prior to booking an event, you are welcome to visit any event of ours for a test. If your car is too loud for a particular track, fear not, we can hire you extra silencing equipment (subject to availability). "
*75cm at some tracks
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