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Am I the only one who likes to stand outside the car when it warms up & eventually reaches that point where the engine makes a wop wop wop sound before dropping the revs?

dont do it intenionly but by the time i drive it out of the garage and get out to shut the door again it does the wop wop noise

Someone should put a video on of this

Jordan100200 wrote:Someone should put a video on of this

Agreed

I'll do a before & after once my exhaust has been replaced......

smudge wrote:I'll do a before & after once my exhaust has been replaced......

dont see what the difference would be as the sound comes from the engine bay/secondary air valve bypass

eightfoot wrote:

smudge wrote:I'll do a before & after once my exhaust has been replaced......

dont see what the difference would be as the sound comes from the engine bay/secondary air valve bypass

I'm not putting the stock zorst back on, so I would think the overall tone of the system will be different no?

eightfoot wrote:

smudge wrote:I'll do a before & after once my exhaust has been replaced......

dont see what the difference would be as the sound comes from the engine bay/secondary air valve bypass

I always wondered why the noise was different for the first 20 or so seconds
What's the reason for it doing that ?

Graeme4130 wrote:

eightfoot wrote:

smudge wrote:I'll do a before & after once my exhaust has been replaced......

dont see what the difference would be as the sound comes from the engine bay/secondary air valve bypass

I always wondered why the noise was different for the first 20 or so seconds
What's the reason for it doing that ?

when you first start up the valves in the exhaust are open as they run on engine vacuum,fast idle produces no vac untill it goes down off fast idle then then valves close as does the secondary air bypass thats when you hear the fluffing noise as the idle comes down and the vacuum increases closing the exhaust valves and the variable inlet vanes and the secondary air system which helps with the cats warming up by blowing air into the exhaust (but dont quote me as i'm no expert)

Cool, cheers
They always sound much better first thing in the morning. Just a shame you can't boot the freezing cold engine to hear what it'd sound like under power at high revs with everything open

Graeme4130 wrote:Cool, cheers
They always sound much better first thing in the morning. Just a shame you can't boot the freezing cold engine to hear what it'd sound like under power at high revs with everything open

put the gearbox in sport will open the valves or select individual in the mmi car settings and set engine noise to dynamic,think mine is comfort engine,auto everything else,dynamic engine sound,dont think reving it stationary will open the intake vanes thou but you should hear them at about 4000ish rpm as you get increased induction noise

smudge wrote:I'll do a before & after once my exhaust has been replaced......

Replaced?

Does the B8 still limit the revs when cold like the B7 did?

Macdaddy wrote:Does the B8 still limit the revs when cold like the B7 did?

It does, yeah
It'll just change up at 4ish rather than hitting a limiter

carsarecool wrote:

smudge wrote:I'll do a before & after once my exhaust has been replaced......

Replaced?