How loud will my car be?!

[CJspeedsport]

With some track days enforcing a noise limit, is it possible to determine (roughly) how noisey my car will be?!

 

Its a fairly bog standard (factory built) 1.8 zetec with what I assume is a standard exhaust. Is that likely to fail a noise test???

 

Any help appreciated! Thanks!

 

Chris

[alexander72]

Unlikely IMO.... Should be fine

[Pistol Pete]

Most tracks will let you pop along (when theres a trackday on) and measure you volume. If there are no tracks locally to you then try contacting your lical msa sound man (details in the msa blue book - a copy of which can be found under the speed series area) they are usual very helpful.

Good luck and enjoy.

[User0083]

Mine's 1.8 zetec, std exhaust was loud, so went for Ali exhaust, quieter and 93db. Now carbon exhaust and that's loudest of the three. I don't know figures of std or carbon. That's max db reached with iPhone on wall 10ft from car and revved to limiter and let off again, warm engine and stationary.

[Pistol Pete]

Noise testing is done 1m at 45' from the exhaust at 2/3 max revs. There should be nothing behind to reflect the noise. Most track days are 105 or 102 which is pretty loud.

[Norman Verona]

Don't forget that a lot of noise also comes from the induction.

[CJspeedsport]

An Iphone decibel meter! Thats such a great idea. I will give that a go to get a ball park figure.

 

Thanks for the help all!

[Dodgey]

45 degrees and a metre away - easy way is to tape your phone to a meter long stick. Do it where there are not reflecting walls and set your meter/iPhone to Slow/peak hold and "A" weighting.

 

Castle Combe is 100db and I believe Donnington is lower again, but they seem to be the most stringent.

[Young Pretender]

I was worried about mine when I first took it to a track thinking that it was especially loud.  Ended up measuring 98db.

[Playo]

I tried one of them decibel meter apps before it was useless to be honest, but it was a free version so I wasn't holding any hope to start with

 

I know my car is above 100db as it is so I'm getting a chap in cardiff to make me up an exhaust that I can choose the sound level, if yours needs doing perhaps we can try and get a deal for the both off him??

[gavinnn]

Donnington is 98db now but it only has a drive by limit so it refers to that. They also move the 2 sound receivers around as well.

[CJspeedsport]

Thanks for the offer Playo, but I can't spend another penny on my car for a while...I got a bit carried away over the Christmas period...roll cage, harness, Tillet seat.

[Playo]

Sounds like me! Ha i look forward to seeing your car it sounds very similar to mine

[Terzo204]

I have a standard 1.8 Zetec on Jenvy TB's and it has been tested several times in 2012. The result is consistently 97.5-98 DB. 

 

BEFORE you book a track-day check - you wont' get a refund if you car fails. Look to see whether it's drive by or static and it's not always 3/4 revs. Some say 4000rpm regardless of max revs. 

 

Mike

[Dodgey]

It is very easy to move my red line on my rev counter..... :-)