There is a sound symposer that "pipes" engine noise into the cabin. The delete means removing this.

 

https://www.mountunestore.com/collections/mk2-focus-st/products/focus-c307rs-symposer-delete gets rid of sound in cabin !

 

I did it on mine simply to tidy the engine bay. Hasn`t made any difference either way with regards to noise.

 

I did it on mine simply to tidy the engine bay. Hasn`t made any difference either way with regards to noise.

Same here

 

I find it quieter on a motorway cruise, and the induction noise sounds less artificial.

Wish I'd done it sooner.

 

That and the diaphragm is prone for splitting causing a boost leak.

 

I find it quieter on a motorway cruise, and the induction noise sounds less artificial.

Wish I'd done it sooner.

Everything is now louder anyway cos of the Milltek

 

Everything is now louder anyway cos of the Milltek

Mines the Mountune resonated job - about as quiet as you can get!

 

I did it on mine simply to tidy the engine bay. Hasn`t made any difference either way with regards to noise.

Same here. Even with a quietened down Mongoose non res system I can still hear the engine and exhaust notes.

 

I have symposer delete, I only did it as I didn't fancy the potential for a boost leak. I can't say I've noticed any difference in sound, my car is bloody loud, although since my Elevate top pipe the turbo noises are ironically elevated too, I'm sure they'd be far more pronounced if I wasn't running such a loud exhaust.

 

Once and for all a split symposer diaphragm CANNOT cause a boost leak - you could rip the centre out and it would not leak boost! The symposer diaphragm is in 2 halves, that is 2 chambers with a seal across the middle, if the boost side splits all you lose is noise to the cabin. The symposer diaphragm actually has a small hole in it when made (a hole in the centre, in each half), so if it wasn't sealed in 2 separate chambers it would leak from the factory.

 

Once and for all a split symposer diaphragm CANNOT cause a boost leak - you could rip the centre out and it would not leak boost! The symposer diaphragm is in 2 halves, that is 2 chambers with a seal across the middle, if the boost side splits all you lose is noise to the cabin. The symposer diaphragm actually has a small hole in it when made (a hole in the centre, in each half), so if it wasn't sealed in 2 separate chambers it would leak from the factory.

CORRECT!

I removed mine to tidy the bay and to enjoy the genuine engine/exhaust noise. I removed the complete symposer feed pipe (rather than sticking a metal bung in the end) and sealed off the outlet on the inlet pipe with a silicone cap from ebay for less than £2.

 

I removed mine & fitted a DV in it's place. Much better use of the pipework & space.

***Preparing myself for a virtual butt kicking about admitting to liking my DV now - thou spawn of Satan!!!***

 

I removed mine & fitted a DV in it's place. Much better use of the pipework & space.

***Preparing myself for a virtual butt kicking about admitting to liking my DV now - thou spawn of Satan!!!***

spawn.gif

@[member="nickst500"] You heathen :lol:

 

Hi Nigel,
Pls send me the details where to order this silicone cap (UK, EU). Should choose 35mm inner diameter? The hose from the cold boost pipe to the symposer is cracked in the middle of its lenght although still not leaking.

 

From here: Auto Silicone Hoses End Blanking Caps - Finishing Bungs Silicon Pipe Rubber | eBay

32mm is the right size. It will stretch over the plastic connector on the inlet that the old pipe fitted on to.

You obviously need a jubilee clip to hold it on.

 

From here: Auto Silicone Hoses End Blanking Caps - Finishing Bungs Silicon Pipe Rubber | eBay

32mm is the right size. It will stretch over the plastic connector on the inlet that the old pipe fitted on to.

You obviously need a jubilee clip to hold it on.

Tnx, these want to charge me 38 £ for postage to Croatia. 👎 For example envelope sent via Royal mail signed is a few £ .

So I take the silicone cap of 32mm inner diameter, was planing to re-use the existing spring clamp. Dat Ok?

 

better to buy a new clamp.

I don't know where you may be able to buy a cap locally.