New 2019 Vantage interior noise

[bjd7326]

Whilst the engine noise is brilliant on short journeys... On a long run the V8 burble can be a bit too much on light throttle openings. Can anyone give me a bit of info on how to turn it down? I believe there is a manifold pressure symposer in the car somewhere... can it be disconnected?

[AstonV]

Might be the trait of the MB bi turbo. Aston has done their best to mask a horrendous sounding engine.

Why don't you go to your dealer.

[bjd7326]

There isn’t actually anything wrong with it, I would just like to play with the characteristic...

[ruaricoles]

The symposer won't be doing anything at cruising speeds / low throttle openings so it wouldn't help you I'm afraid. Make sure you're cruising in Sport mode rather than Sport+ or Track which will keep everything as (relatively) calm as possible! Enjoy.

[bjd7326]

I understand the symposer is driven from a vacuum pipe from the inlet manifold, can you tell me where it is and what the pipe looks like if I am correct I would like to try clamping it off before I get serious with the exhaust?

[Jon39]

The word symposer is a new one to me, and I now see that it does not have much connection with a symposium.
The definition seems to be, 'it carries engine sound into the cabin'. Surely if anyone wants that, they could simply buy a diesel car.

Exhaust sound can sometimes be musical, but engine sound is usually just mechanical noise.

Please explain why such a device is so good.

[bjd7326]

Not sure how to answer this. Aston Martin call the device a symposer and I understand it’s basically a diaphragm with one side connected to the inlet. It’s placed in the cabin somewhere to increase the ‘juicy’ engine notes...
ps I’d like to know more technical facts on this and see if I can switch it off...

[JohnG1]

Jon39 said:

but engine sound is usually just mechanical noise.

The inlet is somewhat of the opposite of the exhaust, what goes out the exhaust went in the inlet. So you can get some grunty sounds, rather than just reciprocating and rotating parts sounds...

[LTP]

Jon39 said:

Please explain why such a device is so good.

Whilst I'm not saying they are good, symposers are used to pipe some induction noise into the cabin (not the rattly engine noises) to make the car sound sportier if the engine note is a bit of a drone, or if the NVH is too good. It seems to be something customers want; or at least the engineers and marketeers on the project team think the customers want.

Don't forget that some modern cars actually pipe artificial sporty engine sounds into the cabin via the ICE system speakers.

[Jon39]

JohnG1 said:

Jon39 said:

but engine sound is usually just mechanical noise.

The inlet is somewhat of the opposite of the exhaust, what goes out the exhaust went in the inlet. So you can get some grunty sounds, rather than just reciprocating and rotating parts sounds...

When thinking about the basics, Suck (or with turbochargers Blow), Squeeze, Bang, the inlet side comes before any Bangs. The Bang sound is of course directed through the exhaust system and out of the tailpipe(s).

If this newfangled symposer sends sounds from the inlet manifold into the car, then what sounds do the occupants hear, and are they pleased to hear this additional noise? The OP appears to indicate a dislike.