S5 Exhaust Valve Mod

benibarra23

Registered User
Thanks to you guinea pigs for trying it out. Just picked up my 2019 S5 Sportback. Im loving this car. Wish it was louder though like you. Couple of questions before I pull the plugs. Does it show a fault on the dash? Can you do it with out lifting the car up on a jack?
 

Craig999

Registered User
Don't need to pull plugs just set individual setting to sport and when you start the car toggle from dynamic to individual and back to dynamic and valves stay open till you switch of engine as below


Ok, so I’ve been running with the valves unplugged for a week but my ocd has been wanting to plug them back in..

Today I’ve been running live data logs from odb eleven to see what the valves get upto when plugged in.

In Eco, Comfort and Auto all in Drive or Sport they are fully variable (all open to valve 1 and or 2 closed) dependant on throttle load, closed ( lists at 90%) to open (10%) don’t know what the percentages relate to but at ignition off they read 35%.. the road speed has no relation to their status, it’s load based..

Anyway, under Dynamic and Individual (exhaust set to sport) they are also fully variable unless in Sport on gearbox, then they are always open ...

ok so some will already know that... here is the interesting bit, if you toggle to dynamic or individual after the engine has started, the valves will remain fully open all of the time until the engine is next switched off, this includes the standard drive setting on the gearbox. It reverts back after next restart, but toggling enables again.

For some this may be preferable to removing the plugs.
 

Tony Resta

Registered User
Two quick clips of the exhaust sound after having unplugged the valves. It's no RS tone obviously but I feel it's much better than before, and has a nice deep sound during low revs around the city.


 
I need to get some sound clips done of the Milltek before it comes off and the S5 goes back :-(
 

thesmileyone

Registered User
I've just wanted to give a little update and bump to this thread with a video.
So there are loads of videos on the the internet about the sound of the S5 but they hammer it like hell. The whole point of this mod, that you can enjoy the soundtrack with normal day-to-day driving. In this footage I've never went over 2500 rpm, most shifts were around 2000. Gearbox was in Auto and normal D mode.
Pair of headphones and hd mode recommended.

Nice I live just ~5 miles NW from where that video was taken. I will look out for you! Someone pulled up to me at those traffic lights recently in a S5 sportback, waited for me to drive off, which I did in my very muted 2.0T (it has an OPF so even more muted :/) then stormed off in his S5 which clearly had the valve job done!!! Sounded lovely.
 

JulienG

Registered User
For those who have disconnected the valves too keep them open, are you able to hear a difference in Dynamic + drive Sport mode ?
Thanks
Julien
 
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