Acoustic Valve

[OiNK]

Ok, noob question time

What on earth is an acoustic valve and why do people go about removing them?

Thanks

 

[DaveDreads]

It makes the car quieter so it complies with eu drive by noise regulations,
most people remove them so they can get more air to there induction kits.

 

[OiNK]

Oh interesting, is it worth removing with the standard box still on the car? Anyone got a pic of where it is located? I dunno what it even looks like to be honest...thanks.

 

[DaveDreads]

Yeah, some people remove it, makes the car sound more growly.

Not easy to get a pic of it as its behind the passenger wheel arch.

here is the guide most people use to remove it, lots of pics aswell.
http://cliotrophy.co.uk/forum/viewtopic.php?f=2&t=1592

I'm running a V6 espace airbox (JMS Induction setup) with no cold air feed
and ive left my acoustic valve in, can't be arsed to remove it.

 

[OiNK]

Thanks mate Might give it a go and rip the fucker out

 

[DaveDreads]

No probs, good luck.

 

[Jonny1*2]

doesnt' make any difference to noise, but easy to remove. Even easier with the bumper off

 

[Cup_Phil]

It does nothing and doesn't affect the noise at all

Driven mine with it on and off - and it makes no difference

Just means the cold air feed rattles about with nowhere to bolt

 

[OiNK]

Thanks for the input guys, will take that into consideration fuzzy, only reason it may come off is to get a CAF right down there.

 

[jablitt]

i removed mine with no problems, its a dead easy job. cant notice any difference to be honest but im not putting it back in because it doesnt seem to serve much of a purpose being there.

 

[Cup_Phil]

Thanks for the input guys, will take that into consideration fuzzy, only reason it may come off is to get a CAF right down there.

That's the only and best reason to remove it

 

[@Spoonie]

Take it off, you'll gain 10 horses and popularity on here.

 

[OiNK]

lol spoonie

 

[VXR killer]

its a valve that opens and closes on on a secondary inlet depending on manifold pressure at certain rpm, and maybe a cold start inlet.

 

[DanFreemanPhoto]

I've had mine off, makes no difference at all, but I had to take it off to put my brake ducting in - so valid excuse!

 

[0-100mphin15sec]

Made a difference on mine

 

[OiNK]

Holy s**t, just took this off now, it sounds totally different and far better!!

 

[Eddyg]

I've just got rid of the standard CAF from it altogether and it sounds far meaner! Bearing in mind the JMS setup doesn't use it either.

 

[OiNK]

Yeah totally eddyg, it sounds brilliant now!! The growl off it is fantastic!