Why block the Acoustic valve pipe?

[Just Plain Yates]

I've read all the treads about removing the Acoustic valve... but why exactly are we supposed to block off the pipe between the valve and the air box if the valve lets air in... surely more air is better?

 

[Fred@BTM]

nope, its a vaccum line that operates the valve, if its not blocked your engine will idle at 3000rpm

 

[bing_17]

Which bit are we on about here again lads?

 

[lemonnobby]

theres a vac pipe that runs from the inlet manifold by the throotle body to the ascoustic valve

 

[Sean6545]

Why remove it anyway?

 

[clio_luke]

a little bit more induction noise and less restrictive

 

[Tigger]

You need to remove it if you change your induction method anyway