Ferrino
|
| posted on 24/7/06 at 01:27 PM |
|
|
Trackday Noise Limits
Was wondering what the protocol is for measuring static BEC noise limits on trackdays? Do they measure at 3/4 of rev limit or something? And are they
savvy as to the rev limit of the various engines yet?
|
|
|
|
|
shortie
|
| posted on 24/7/06 at 01:43 PM |
|
|
Unfortunately they do measure at 3/4 revs (usually) and they have enough savvy to know what the revs should be usually.
Problem is it's all very well passing a static test by lowering the revs but you will still often get done on a drive-by meter.
Rich.
|
|
|
cadebytiger
|
| posted on 24/7/06 at 01:44 PM |
|
|
What is the standar noise limit for a track day?
abouy 95db??
Thats about the same as a power drill i think?
Mine is louder than that i am sure!!
Rupert
|
|
|
zxrlocost
|
| posted on 24/7/06 at 01:50 PM |
|
|
not as low as 95 mate unless you go to a 'Posher' track like donnington
I only got 97 with a standard r1 Can
|
PLEASE NOTE: This user is a trader who has not signed up for the LocostBuilders registration scheme. If this post is advertising a commercial product or service, please report it by clicking here.
|
Ferrino
|
| posted on 24/7/06 at 01:55 PM |
|
|
I was looking at doing a 100dB airfield day - feck, at 9000 RPM mine has gotta be pretty close to that! Will get it tested methinks.
|
|
|
R1minimagic
|
| posted on 24/7/06 at 03:56 PM |
|
|
Mine was tested a CC at 102dB with the standard R1 airbox and can at 7500rpm. However, i was told that when going round the track it was one of the
quietest cars there!!
|
|
|
ChrisGamlin
|
| posted on 24/7/06 at 04:47 PM |
|
|
Ive found there is usually a bit of "artistic license" you can use on the peak revs, especially if you aren't using the bike clocks
so its not immediately obvious where the red line is.
I was tested the other day at Oulton Park, and I measured 97dBa @7500rpm (I said it revved to 10k  ). That was with a carbon R1 can and sausage
filter.
|
|
|
Ferrino
|
| posted on 24/7/06 at 04:51 PM |
|
|
Hmmm, looks do-able then with a '10K limit', as I also have carbon R1 can and sausage filter. I think it's easy to tweak to max
displayed revs on my digital dash
|
|
|
skydivepaul
|
| posted on 24/7/06 at 08:31 PM |
|
|
it all depends on which track day you are doing. most will go on the 2/3rds max revs which also gives you a bit more leeway as opposed to the 3/4
max
mine reads 99db to 104db depending on who is using the sound meter!!!!!
R1 engine with pipercross filter and mk exhaust.
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
|
|
|
smart51
|
| posted on 25/7/06 at 07:03 AM |
|
|
My R1 engined car reads 101dB(a) at 8800 RPM on an uncalibrated meter. I have a 6" x 26" repackable stainless silencer on a 4 into 1
headder. Should be fine for the 105dB circuits.
[Edited on 25-7-2006 by smart51]
|
|
|
cadebytiger
|
| posted on 25/7/06 at 08:15 AM |
|
|
where do they take the reading cos mine is alot louder on the exhaust side!
Rupert
|
|
|
skydivepaul
|
| posted on 25/7/06 at 09:07 AM |
|
|
unfortunatley they take the reading at the exhaust side.
it should be 0.5 metre from the exhaust exit @ 45 degrees
reading at 2/3 max rpm
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
|
|
|
smart51
|
| posted on 25/7/06 at 11:07 AM |
|
|
Readings are usually taken at 3/4 max revs. My car is louder 0.5m from the bonnet on the exhaust side than it is 0.5m from the tailpipe.
|
|
|
R1minimagic
|
| posted on 26/7/06 at 05:18 PM |
|
|
Which circuits are 105db??
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:56 PM |
|
|
What's the limit during SVA? is it more or less that the average trackday limit?
Rich.
|
|
|
Ferrino
|
| posted on 9/8/06 at 04:36 PM |
|
|
In the end I was tested at 7,000 RPM and made 99 dB (limit 100!) so just scraped through! This is with standard R1 can.
|
|
|
