I’ve read threads regarding improving/upgrading exhaust and how the turbo doesn’t allow for a “supercar” sounds.. etc..,etc.. But what doesn’t make sense is how some companies make turbo cars sound incredible. Here is a 488 with F1 sounds.. is it the engine of a 911 (outside of the NA version). Why not possible by Porsche on turbos?
https://youtu.be/K-Xq9MNj9dQ?si=GP0ijzhsPA20mp8A

 

From what I can see it's a combination of things.
1- the turbochargers. These just have a negative impact on sound. Period
2- the size of the piping. The flange coming off the turbos is insanely wide. Pretty sure this contributes to the way-too-deep exhaust note


I think it could be fixed but unsure about the power or driveability repercussions. I've been considering experimenting with having someone build me a custom 2.5 or even 2.25 inch diameter x-piped and non-slienced exhaust. The pipes would come out of the cats, to an x, and out the back.
The other way to fix it is building a tuned muffler, which nobody is really doing. Usually with the aftermarket solutions, it's just a straight through silencer. OEMs build tuned mufflers and that's why they can get good sound out of crappy engines. Look at Nissan's VQ35 as an example. They have a decent exhaust note from the factory but as soon as you remove that factory muffler you're pretty much screwed. It's going to sound bad.

 

Thanks. That makes sense… haven’t thought about the flange.. Would be really interesting if Porsche would make some changes and at least for the TurboS this would be possible.

 

I used to blame the lack of cross over of the banks especially because aftermarket exhausts for the 911 always involve an x pipe, but then later learned that a lot of european cars do not have (or much) cross over like the 488. So now I have no idea. Seems like the engineering behind having an x pipe is much more complex than just "double the pulses" to increase the exhaust note an octave up, though it has a nice effect, if someone actually knows I'd love to learn as it's been difficult to research on the internet.

Though something which is more clear is the lack of equal length headers coming out of the banks. I imagine packaging a 911 engine is a nightmare as it's just really crowded back there, so the design needs to compromise between making everything equal length for sound versus maximizing for power efficiency. A big difference between the F8X and G8X M3/4 was a change to equal length exhaust design.

 

Consider "Cherry Bomb". They always pumped up the volume back in the day.

 

Regardless of turbos, you're just not gonna get that F1 sound from the little tiny V6's we have in our porsches... the 488 is a super high compression, flat plane crank, 3.9l V8 and with tons of engineering put into just the sound of the exhaust.... You should feel lucky that Porsche didn't do as Ferrari did and put GPF into all the cars from 2021 forward.-- THAT really kills the sound, even more than turbos do.

 

who’s gonna tell him

 

Most of us I think am safe to say, don't mod the exhaust solely for sound but for 1) weight loss, 2). increased hp and then maybe 3) sound.

 

Someone will take the bait.

 

yes, I know it's a flat6

Mine sounds like a go kart with a briggs and Stratton engine on it.

 

You might want to google what engines are using in F1.

 

Hello Daddy? Hello Mom?

 

[QUOTE=dudeoverthere;19580585]Hello Daddy? Hello Mom?[/QUOT
Dup.

 

Well into my 60s, how else could you remember those things. LOL

 

huh?? lol-- some of you need to learn to read... I was responding to the original post which asked about gettin that F1 sound, like the 488 he heard. Not an actual F1 car....

unless, you're also referring to F1 cars having a turbo V6... but if you are, that COMPLETELY irrelevant to getting that sound from a 911 v6 -- the only similarity in the engines is that you can count 6 cylinders.