Want More Noise

[Singh]

Okay, so I finally have a set of Quads fitted to my '8 after a trip to MIJ, I now want a bit more sound from the engine. I read somewhere that someone drilled their air box, does anyone have any instructions on how to do this? Also what are peoples thoughts on K&N air filters, has anyone noticed any differences after installing one?
Thanks

[Mkoneman]

this is the one off my 4.2 that i still have, 20mm holes on the back side near the wheel arch area so it gets the coldest air it can

quiet on soft acceleration, deep roar on full load

[Singh]

Thanks Mkoneman, had mine done now...

[Mkoneman]

cool, good sound with the exhaust too??

[Singh]

I have noticed a bit more engine sound when I really give it some welly, but most of it gets drowned out by the exhuast! The car sounds lovely, people say they can hear me from the other side of a really long road, having no rear silencers doesn't help

[Jake242]

Hi Guys,

Looking for a little more engine sound(as I can hardly hear the car on full acceleration) is there any drawback to drilling holes in the intake cover? Can you alternativly install an open filter? And if so, where to get it?

I am not looking to damage the engine though.

Cheers, Jake

[Dezzy]

I've drilled mine and put 20 - 30k on it since. I've drilled airboxes on loads of cars in the past with no issues. It'll possibly use more fuel and loose a touch of performance.
I have worried in the past about water getting being sucked in but i've not had issues.

Induction noise is far better than exhaust imo.

Never looked for open filters personally

[Goran]

My experience with my previous S8 was that when I had a new exhaust installed, not only did the exhaust note improve, but you could also hear more growl from the engine from the front.
I did have 100 cel cats installed at the same time so maybe that could be it rather than the exhaust.

One downside to drilling the air box, is that you are sucking in warm air from the engine bay, one of the purposes the air box was put in to avoid the warm air and draw in cooler air from the outside.

[Jake242]

What exactly is the reason that it gives a better sound?

Could I fit a bigger tube on the top of those holes making more cold from the outside comming directly to those holes... maybe putting a heat blanket around to prevent heat from the engine?

[ainarssems]

Air box work is designed to work as intake silencer so the effect is similar to that if you drilled holes in exhaust silencer but to lesser extent. Fitting the pipe over them would diminish effects.