Noise meter - where to stick it ?

[2DOGS]

So I've just had a spanking new zorst fitted which is probably louder than the old one and before I book up for the next track day I thought it might be a good idea to check it's noise level. I've purchased a noise meter and I've searched for where to hold it and at what revs etc.. but can't find anything on the subject.
Any help much appreciated.

[E2DJH]

When mine have been checked, it is from one metre, at 45 degrees to each exhaust pipe.

I had to buy silencers

Hope you pass

[LocoBlade]

I thought it was generally half a metre, 45 degrees?

Edited by LocoBlade on Monday 30th July 20:44

[LocoBlade]

Half a metre seems to be what the BaT site suggests, looking at the circuits like Goodwood, Coombe and Rockingham who all have static limits

http://bookatrack.com/-pV

[E2DJH]

LocoBlade said:

I thought it was generally half a metre, 45 degrees?

Half a metre makes more sense. My bad.

[optimax sniffer]

half metre, 45 degrees.

But check with your local track, most will measure you FOC too

[2DOGS]

Thanks chaps - that makes sense.
I presume at 3500ish revs.

[LocoBlade]

Generally 3/4 max rpm (or max power rpm) so more like 4500 on your average tintop engine

[2DOGS]

LocoBlade said:

Generally 3/4 max rpm (or max power rpm) so more like 4500 on your average tintop engine

Thanks I'll give it a go tomorrow - bit late for the neighbours now

[7 Sevens]

2DOGS.

Where did you get your meter? I need to get a car tested for exactly the same reason.

Thanks.

[2DOGS]

7 Sevens said:

2DOGS.

Where did you get your meter? I need to get a car tested for exactly the same reason.

Thanks.

One of the suppliers I use in work do them, £21.10 plus a couple of quid P&P.
You'd need an account with them and minimum order is £250 so if you wanted one, mail me and I'll ad one to my next order. I order weekly so no prob in getting one.

[7 Sevens]

2DOGS,

Great, I've sent you a private mail. Good luck with getting yours within the limit. As people have mentioned the unit should be held at 45deg and anywhere between 50-100cm away.

With my race car I actually found the noise reduced when it got into a higher rev range. Experiment with holding it at different levels to find the quitest level.

[skOOby]

Maplins do 'em quite cheap too...

skOOby