Interesting I wonder why they have done this. Is it cost ? If the car is ok with 2 pipes when why did they initially build them with 4 it's not like you can see it has 4 pipes ?

10 minutes ago, Nick_H said:

Interesting I wonder why they have done this. Is it cost ? If the car is ok with 2 pipes when why did they initially build them with 4 it's not like you can see it has 4 pipes ?

Could be emissions related?  Could the exhaust/engine combo just be more efficient/economical and allow WLTP compliance to be met? 

I would understand this moving from the 280 non-filtered engine to the WLTP dual filter 272. But we found out that the 1st phase 272 WLTP engines with all filters still came with valved exhausts ?!  

That's what's weird...

42 minutes ago, newbie69 said:

Naaah, I love my virtual cockpit... and my 7th gear just as much . 220km on the highway the other day with an average speed of 70mph and I got 38mpg on a 1600kg 360bhp car with just 600miles on the clock, not too bad?

I get consistently better economy than my lighter but only 6speed DSG GTI on every trip bigger than 6-8km.

It's very good considering the power and weight of the car; especially so when you consider a 'performance' diesel from say A6 or A7 won't return much more.   

 

I think low to mid 40's would easily be reachable as the engine loosens up.  I've had low 40's on a 200 mile trip.   

 

Enough of this economy talk 

Just now, penguin17 said:

Enough of this economy talk 

 

Exactly...

1 hour ago, newbie69 said:

I would understand this moving from the 280 non-filtered engine to the WLTP dual filter 272. But we found out that the 1st phase 272 WLTP engines with all filters still came with valved exhausts ?!  

That's what's weird...

It is yes.  

 

Supply chain change perhaps?   Cost reduction?  

Yes. I can’t understand why it would be anything other than that @penguin17 - pending a recall later this year on the valves exhausts! 

15 minutes ago, NorthernSkodian said:

Yes. I can’t understand why it would be anything other than that @penguin17 - pending a recall later this year on the valves exhausts! 

 

They can whistle if they think they are messing with my valves or touching my exhaust !

So are the later ones open pipes then? 

 

Seeing this means I'll be checking under ours when it arrives this weekend!

Edited 28 March, 20197 yr by Swervin_Mervin

I would prefer having them than not for sure, but my buddy's R didn't sound that much more exciting even with the valves on. My non-valved Clubsport on the other hand with the louder muffler from factory was crackling and popping at every lift off when hot and in Sport mode.

So if anyone's after some actual exhaust sound a cat-back is the easy solution here.

Trouble is, only supersprint seem to make a catback for the superb and it's about 5k

8 minutes ago, SteHaworth said:

Trouble is, only supersprint seem to make a catback for the superb and it's about 5k

5k for a cat-back does not sound right. What is special about the Superb? I would imagine the exhaust routing should be identical to the R wagon? Haven't investigated much into cat-backs so could be wrong though.

Nobody else seems to make them for the superb , they also, only make them with the valve so probably no good for later MY2019

Edited 28 March, 20197 yr by SteHaworth

If you go with something aftermarket you'll have the extra sound you want anyway, not worth paying for valves imo.

But I'd ask around other exhaust makers like Milltek, BCS etc. I would be very surprised if you couldn't get a standard system (non-valved) for around 2K or less.

For those without valves, just shout brrrrmmmm brrrrrmmmm out of the window as you drive around.

 

You're welcome 

30 minutes ago, newbie69 said:

If you go with something aftermarket you'll have the extra sound you want anyway, not worth paying for valves imo.

But I'd ask around other exhaust makers like Milltek, BCS etc. I would be very surprised if you couldn't get a standard system (non-valved) for around 2K or less.

Already been onto BCS

45 minutes ago, unclerichy said:

For those without valves, just shout brrrrmmmm brrrrrmmmm out of the window as you drive around.

 

You're welcome 

I actually forget about it when I shift into 7th... 

7 minutes ago, newbie69 said:

I actually forget about it when I shift into 7th... 

Touche 

I'm still struggling with this. Surely valves are there to keep it quiet at part throttle and open up with heavier throttle. So having no valves is better surely?

 

 

1 hour ago, Swervin_Mervin said:

I'm still struggling with this. Surely valves are there to keep it quiet at part throttle and open up with heavier throttle. So having no valves is better surely?

 

 

Lol, it's the other way around. During part throttle, valves are closed so that gases pass through the muffler as usual (ie. as in non-valved systems).

Under certain "sporty" situations depending on mode and throttle they open and divert the gases out bypassing the muffler stage or at least via a less restrictive path, hence the extra noise.

So, without valves you are always in the normal/quieter condition, rather than in the louder one.

This thread is useless without some butterfly valve action: 

 

 

 

11 minutes ago, penguin17 said:

This thread is useless without some butterfly valve action: 

 

 

 

Cheers Penguin!

But seriously if that's what all the fuss was about... 

42 minutes ago, penguin17 said:

This thread is useless without some butterfly valve action: 

 

 

 

 

My very own valves no less :-)

1 hour ago, newbie69 said:

Lol, it's the other way around. During part throttle, valves are closed so that gases pass through the muffler as usual (ie. as in non-valved systems).

Under certain "sporty" situations depending on mode and throttle they open and divert the gases out bypassing the muffler stage or at least via a less restrictive path, hence the extra noise.

So, without valves you are always in the normal/quieter condition, rather than in the louder one.

Apologies if I'm being a bit thick about this, but that still makes no sense.  Valve closed under part throttle so quieter.  Valve open under load so louder - you've just confirmed exactly what I said on that.

 

However, no valve = permanently open?  There's no restriction in the pipe.

 

I can see the butterfly valve in my 3 series, and the popular mod is to either remove the vacuum hose to keep the valve open, or just physically rip it out.

9 minutes ago, Swervin_Mervin said:

Apologies if I'm being a bit thick about this, but that still makes no sense.  Valve closed under part throttle so quieter.  Valve open under load so louder - you've just confirmed exactly what I said on that.

 

However, no valve = permanently open?  There's no restriction in the pipe.

 

I can see the butterfly valve in my 3 series, and the popular mod is to either remove the vacuum hose to keep the valve open, or just physically rip it out.

I think you are confused from the position of the valve but you forget the fact that without valves the routing is different - ie. you don't just take the valved system and delete the valve and let gases go straight out!

Without valves then, there is only one path available and that is the quieter one, through the muffler. It could never be the case that the system is built in a way that the "louder" exit is the default one.