EU noise limits on street cars

Anonymous · Post by **Anonymous** » Thu Dec 21, 06 9:24 pm

I have been told on a few occaisions it is illegal to have a number on your door regardless of weather it is in a competition box? That perticular copper is an awkward miserable sod anyway. He is well known in our town for picking at people. He tried to tell me once that my horn is illegal too.

latil · Post by **latil** » Thu Dec 21, 06 9:27 pm

The horn isn't illegal,Numbers on the sides of cars always have been unless on a racetrack.

Anonymous · Post by **Anonymous** » Thu Dec 21, 06 9:38 pm

DB is a very difficult thing to understand, well for anyone other than sound guys I guess.

This is all from memory from the heavy plant days (2yrs3months so recent)

85db is the point where ear defenders are on or you're sacked, a bench grinder is over that, a 100ton dump truck isn't, now me personally the truck is worse but the tinny grinder sound does more damage, it's the higher resonation that does it, people with damaged hearing can still hear lower frequencies.

I'd take a guess that a turbo motor resonably unsilenced would be worse off than a 440, much higher pitch, maybe even the turbo whine would do it.
As Rob said, take an unsilenced 2 stroke POS rode by the usual moron, much worse on the ears than a Harley, higher pitch versus lower pitch.

If it does ever come in I guess my truck is a good test, 1998 so no slack in the mot, it's got a spintech muffler, 3" in, twin 2 1/2" out, very low pitched noise, i'm sure it will be fine.

Here's a tip from spintech, with there mufflers the longer the pipe after the muffler the louder the noise, more resonance.

Here's a tip from me, if it comes in and if it applies and if there's any doubt just have 2 sets of mufflers, 1 set for the mot, 1 set for the 364 days left, in the uk rules are meant to be broken

if it comes in do you actually think all the countries in eastern europe are going to adhere to it, nah it will just be us suckers as usual

Pete · Post by **Pete** » Thu Dec 21, 06 9:47 pm

...errrr, the Dixie horns ARE illegal. They do not emit a single continuous tone. I still have them, just be aware of your position under "Construction & Use". Same applies to red indicators (Post 09-67 they are illegal).

Dave-R · Post by **Dave-R** » Thu Dec 21, 06 9:57 pm

Sound levels in these sorts of situations are normally measured at one meter. Not always. But I would expect one meter in this case.

The db scale is logarithmic. That is to say 100db is not twice as loud as 50db. It is 4 times as loud (or something like that - it's been a long time).

So going from 75 to 95 (the point where permanent ear damage can start) is actually quite a big jump in volume.

TrevD · Post by **TrevD** » Thu Dec 21, 06 10:25 pm

i have access to a sound level meter and if used in conjuction with the regulations stated in the construction and use regs , my hot rod ( running a rover with no silencing) is actualy legal and i think a yank with side exit exhaust will be better off than one with a stock rear exit system. i intend to run the duster with no silencing, just headers exiting the bodywork, as the law stands it is classed as a full system so if it has no leaks cant fail an MOT

Anonymous · Post by **Anonymous** » Thu Dec 21, 06 11:00 pm

Pete wrote:...errrr, the Dixie horns ARE illegal. They do not emit a single continuous tone. I still have them, just be aware of your position under "Construction & Use". Same applies to red indicators (Post 09-67 they are illegal).

I was under the imression the lew was pre 73 cars could have them??? Just goes to show the local constabulary know as much about that one as me

.

latil · Post by **latil** » Thu Dec 21, 06 11:03 pm

As far as I know, it is illegal to FIT musical horns to post '73 cars and illegal to USE musical horns on the public highway whatever the year of the car.

Alex · Post by **Alex** » Thu Dec 21, 06 11:09 pm

Red indicators are pre 66 guys

DaveMadders · Post by **DaveMadders** » Fri Dec 22, 06 9:17 am

I've had noise tests done by VOSA when UK registering anything with a non standard system - if it has a sticker of federal conformity in the door shut they accept that its OK if standard. I remember taking a Ram SST for SVA with dual flowmasters and having to pass a noise test.... passed no problems. I guess the MOT noise test will have similar limits to the VOSA SVA test.

Pete · Post by **Pete** » Fri Dec 22, 06 9:20 am

Ooops, Alex is right, typo on my part - I meant 09-65....sorry...........

Holly · Post by **Holly** » Fri Dec 22, 06 10:04 am

Thanks for the info Dave, sounds good to me

Rebel · Post by **Rebel** » Fri Dec 22, 06 2:54 pm

Wil wrote:in the uk rules are meant to be broken

Amen to that

Lost count of how many producers I've had, for various things. Not had one for a loud exhaust yet though