RS4 b9 sports exhaust . When flaps open / closed

[BallamPrestige]

Hi guys
I'm trying to work out when the flaps are open/closed.
In dynamic I can see they are open on startup . But then do they close on moving until a given Rpm when they reopen?

I've seen a kit to blank off the plugs to keep the valves open all the time £40 or so.

Would this make low revs louder?

[Terminator_X]

Get a Cete valve controller instead as valves can be opened and closed at will.

Standard the valves are open at startup, close as you move off then open again in Dynamic at about 4k revs.

TX.

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[RS4John]

+1, go Cete.

I have a feeling that the kits of blank off plugs are of no use to you - I have a notion that there was an Audi (earlier RS3?) that used vacuum pipes to control the valves, on a B9 (and my current RS) they are electric servo motors.

[Avantgarde]

Get a Cete valve controller instead as valves can be opened and closed at will.

Standard the valves are open at startup, close as you move off then open again in Dynamic at about 4k revs.

TX.

Sent from my BBB100-2 using Tapatalk

Isn’t that how the standard exhaust works, not the Sports Exhaust?

[Terminator_X]

Get a Cete valve controller instead as valves can be opened and closed at will.

Standard the valves are open at startup, close as you move off then open again in Dynamic at about 4k revs.

TX.

Sent from my BBB100-2 using Tapatalk

Isn’t that how the standard exhaust works, not the Sports Exhaust?

Both work the same, sports exhaust just sounds arguably better although on the RS4 I'd say sound difference was negligible.

On the RS3 though the sports exhaust was in another league of greatness!

TX.

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[BallamPrestige]

Thanks guys.
As an FYI the blanks are for electrical plugs rather than vacuum.

[BallamPrestige]

Quick update - I tried to simulate what the Cete valve controller would do (eg open flaps all the time in Dynamic mode) by unpugging the valves once open.

Hardly any noticable improvement in the volume or sound at all

I'll pass on the controller now I know that.

Just wanted to feedback for the guys who have sports exhausts and wondered what it would be like to have flaps perm open.

regards

[Terminator_X]

It will be tough to get any improvement. I had sports exhaust, Cete valve controller + back box cut up by PCM and I still wasn't happy!

TX.

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