Acoustic Valve

[sipps 172 cup]

I'm just querying what is the acoustic valve?

 

[Curley]

Keeps induction noise down to meet some EU regulations.

Remove it!

 

[TimR26]

Rip it out!

 

[mike1pow]

took mine out and didnt really notice a difference but it will make some - even if it is only to remove 500g!

 

[jablitt]

I've removed mine. Take it out!

 

[Fred@BTM]

its only to reduce induction noise below 3000rpm, its like an active exhaust valve on the inlet (eu bullshit)

 

[bedford8256]

mines hanging about in a skip yard somewhere unless its been melted down and made into a new action man. it looks restrictive, get it out lol

 

[sipps 172 cup]

Cheers guys, but where exactly is it located?

 

[jablitt]

If you take out the near side arch liner you'll see the acoustic valve on the same bracket as the horn. Unplug everything, and then you have to block up one of the tubes with a bolt. There is a guide somewhere, ill find it for you.

 

[Ali]

Not worth the hassle of removing in hindsight.

 

[jablitt]

http://cliotrophy.co.uk/forum/viewtopic.php?f=2&t=1592&start=60

^^^ guide i followed.

 

[bedford8256]

i removed mine when i fitted a cold air feed, if removing it u may aswell put a cold air feed in there whilst uv got it out

 

[sipps 172 cup]

http://cliotrophy.co.uk/forum/viewtopic.php?f=2&t=1592&start=60

^^^ guide i followed.

Cheers mate I've printed out that guide, will try and do that this weekend. I've seen it before but did'nt know what was it's purpose, because my induction kit is already disconnected from it, so I'll probably just take it out to make room for a CAF, if I removed it and block of that pipe, will it do anything to the normal running of the car?

 

[bedford8256]

no it runs as it usually would

 

[Scunny_182]

What happens if the holes aren't bunged up? Previous owner put the valve in the boot when u got it from dealer. But who knows if he bunged them up....

 

[182michael]

Idles like a b**ch iirc

 

[Craigus]

I wouldn't bother removing it unless you are in there doing something else like changing your filter.

 

[bedford8256]

i just removed mine and moved the pipe out the way, not had any running problems at all

 

[Scunny_182]

Idles like a b**ch iirc

doesnt idle bad, just hear air blowing/sucking on idle coming from that arch????

 

[clio_luke]

no hassle to remove at all if you follw the guide on here. if you remove the frontg fogs too, you will get more air circulating its way to the airbox. remove the top airbox feed too.

 

[MonkeyKnifeFight]

ooohh just read that bit about bunging something up.. my clios idle'd at 1100rpm for ages never seen it as a problem might look into this after ive done all the other jobs i need to do on the car lol.

 

[danzman1991]

Is there an acoustic valve in a Phase 1 172?

 

[nathanH]

No, just the ph2's.

 

[DEEMUS]

am i right in saying that there isnt one for the 1.2's?