legal sound limit
Discussion
deeen said:
isn't that the test for kit cars? what about if i modify a production car, i don't need an sva test then? or am i just confused?
IIRC 101 reflects the current limit, you dont strictly have to adhere to this as, like you say, youre not having a test done. however, if you get an mot tester or police officer looking sideways at it, it would be handy to know that, should they order a test, it will pass
Just had a quick glance at MV (Con and Use) Regs 86, Reg 54,55 in an attempt to answer the question posed. I give up as the regs on noise is tied up with various EEC Regs and it just does not make any sense. 82 and 89db is mentioned but what this applies to God knows.
What I can say is that BiB have the option of sheeting under Reg 97 Con and Use Regs 86 for using a vehicle on a road in such a manner as to cause excessive noise which could have been avoided by the exercise of reasonable care on the part of the driver.
DVD
What I can say is that BiB have the option of sheeting under Reg 97 Con and Use Regs 86 for using a vehicle on a road in such a manner as to cause excessive noise which could have been avoided by the exercise of reasonable care on the part of the driver.
DVD
thank u dwight vd. i thought i had heard of bikes being noise tested by bib but never cars - that kinda explains why.
i always assumed the noise regs you mentioned were intended to target anti-social behavior like lots of hooting and revving outside the old peoples home at midnight, not normal behaviour in a car that happens to be very noisy.
My thoughts now after everybody's input (THANK U!) are to go for the exhaust i want, and arrange some screw-in cans to reduce it below castle coombe noise limit. That should cover most eventualities!
i always assumed the noise regs you mentioned were intended to target anti-social behavior like lots of hooting and revving outside the old peoples home at midnight, not normal behaviour in a car that happens to be very noisy.
My thoughts now after everybody's input (THANK U!) are to go for the exhaust i want, and arrange some screw-in cans to reduce it below castle coombe noise limit. That should cover most eventualities!
Who knows how it works! It comes down to the BiB it seems to me! Iwas stopped on my Ducati Monster which has straight thru cut offs, and is seriously loud, for...... a number plate that was 5 mm - YES 5MM! too small. Did not seem interested in the noise (maybe he was deaf?), had a producer re-mot etc. Also is noise confined to purely exhaust? At a recent track day a Ducati 916SP failed the exhaust noise test, but when the rider pulled in the clutch it passed (Ducati dry basket clutch are reknowned for clatter), so the track official said it was fine! Good guy!Anyone know?
How do they apply the test?
Its all a load of cobblers anyway, cos I suppose the test can only be done with the vehicle stationary.
What revs do they test it at, and in any case when your car (or bike) is at full chat under load, it will make loads more noise anyway.
In kart racing, they suspend a mike over the track at a point where they are under max load and check the noise there. It's a lot more 'real world', but again, how do youtell which kart is the noisy one out of 30 odd screaming past?
Its all a load of cobblers anyway, cos I suppose the test can only be done with the vehicle stationary.
What revs do they test it at, and in any case when your car (or bike) is at full chat under load, it will make loads more noise anyway.
In kart racing, they suspend a mike over the track at a point where they are under max load and check the noise there. It's a lot more 'real world', but again, how do youtell which kart is the noisy one out of 30 odd screaming past?
mustdriveslower said:
is noise confined to purely exhaust? At a recent track day a Ducati 916SP failed the exhaust noise test, but when the rider pulled in the clutch it passed (Ducati dry basket clutch are reknowned for clatter), so the track official said it was fine! Good guy!Anyone know?
Don't know what the actual legal level for cars is, but I'm sure 101db is illegal, I thought it was around 80 - 85 ish.
I've been stopped twice by BiB on the Ducati (916) with straight-thru pipes (IIRC 102db 'claimed' by manufacturers) and 'vented' clutch cover, the noise etc wasn't mentioned, not even by the Cop who sent me to court for (his words) "a period of disqualification"
i beleive the proper test is a drive by not stationary. you also need to know the distance any meter has to be from the car, it makes a huge differance. also not some manufacturers use bypass systems as standard to pass the EU noise test but still give a proper noise and power output.
as to pulling in clutches and things, cooling fans can put you over a limit, as can induction noise. my chevette has a habit of backfiring on overrun after a noise test, so i have to gently ease the throttle closed to prevent embarrising the chap with his meter up the exhaust.
as to pulling in clutches and things, cooling fans can put you over a limit, as can induction noise. my chevette has a habit of backfiring on overrun after a noise test, so i have to gently ease the throttle closed to prevent embarrising the chap with his meter up the exhaust.
Guys
Just my tuppence worth.
Bike exhausts that meet drive by sound regulations will feature a kite mark to prove it. If the can on the bike does not feature the kite mark it is non standard, and to the BIB is a good sign it will be too loud.
Modern car manufacturers have to pass EU noise drive by regulations, I don't know what these are but can find out.
Becuase makers such as Ultima and westfield and caterham don't meet the EU regs (due to the number of vehicles they make engineering a car to meet these standards would be massively high so they are exempt) they comply to a different set of build regs known as SVA, the SVA regs effect newly built kit cars only. Once the kit has passed SVA the exhaust can be changed. There is currently NO test for exhaust noise in the current MOT test. However, thats not to say a straight through exhust is going to cut it, as the BIB can still pull you on anti social charges instead. The only real place you will get problems is if you want to take your car (or bike) on a track. They have limits which are very strict, and which vary from track to track, if you fail the drive by you don't drive.
Sorry for the long post, i'll now don my idiot and flame proof coat.
Just my tuppence worth.
Bike exhausts that meet drive by sound regulations will feature a kite mark to prove it. If the can on the bike does not feature the kite mark it is non standard, and to the BIB is a good sign it will be too loud.
Modern car manufacturers have to pass EU noise drive by regulations, I don't know what these are but can find out.
Becuase makers such as Ultima and westfield and caterham don't meet the EU regs (due to the number of vehicles they make engineering a car to meet these standards would be massively high so they are exempt) they comply to a different set of build regs known as SVA, the SVA regs effect newly built kit cars only. Once the kit has passed SVA the exhaust can be changed. There is currently NO test for exhaust noise in the current MOT test. However, thats not to say a straight through exhust is going to cut it, as the BIB can still pull you on anti social charges instead. The only real place you will get problems is if you want to take your car (or bike) on a track. They have limits which are very strict, and which vary from track to track, if you fail the drive by you don't drive.
Sorry for the long post, i'll now don my idiot and flame proof coat.
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