992 - noise - Page 2 - 911/Carrera GT - PistonHeads UK

Hi all, long time member, very infrequent poster .. Have a 992 Carrera S .. love it. As has been written many times, it's very subtle in the noise department, despite having a so-called sports exhaust in the form of PSE. In reality, you might get a bit more burble at idle but in all likelihood most of the extra noise is because they also open the sound symposers too. I know there are aftermarket exhausts costing £thousands. And I know you can buy a box with some remote controls which open the flaps and give you more noise. If you're in the UK I priced this up at £700. I know you can also get a tune which will do the same thing but #warranty ... It's the flaps in the exhaust .. they just need to stay open! I know you can't just disconnect the wires (cue Christmas on your dashboard) but if you could buy something you just plugged in for less than £100 that opened the flaps permanently, who'd buy it? I think I would! Let me know and I'll see what I can do ..

The simplest solution is to use a shaft collar on the actuating rod. It only uses vacuum pressure to operate so you aren't going to do any harm by holding it open. Whilst semi-permanent, this method also allows some adjustment so you can have the valves partially open if you prefer. One for each side of the exhaust

You can do it through the PIWIS, if you can get a friendly user (I.e. probably not an OPC). Have a look on Rennlist.

It's probably vacuum tubes like most modern cars with exhaust flaps. So, assuming that pulling out a fuse (à la DB9 and Vantage) is not a good idea because Christmas tree dashboard, then you could either: 1) clamp the tubes (a bit like a urologist might so you don't make women pregnant ) - this works for XK8s, Ferrari Californias, Lamborghini Gallardos and Golf R32s so it might work for your car. Try this: https://amzn.to/3UTyaZA 2) disconnect the tubes at the exhaust end. If you go down this route, you'll have dangling tubes that you'll need to tie off somewhere with cable ties. Also, you'll need to block off the tubes with golf tees or similar. This also works for Californias and early Gallardos, and doesn't cause lights to pop up on the dashboard. This kind of idea: https://www.youtube.com/watch?v=58kWDMS-D2w I'm a font of useless knowledge as I have too much time on my hands so end up watching random car vids on YT! Also, I see you're in Surrey, too. I would love to hear a before and after in person. Might be interested in even having an explore underneath your car if you fancy doing the work yourself. M11rph said: The simplest solution is to use a shaft collar on the actuating rod. It only uses vacuum pressure to operate so you aren't going to do any harm by holding it open. Whilst semi-permanent, this method also allows some adjustment so you can have the valves partially open if you prefer. One for each side of the exhaust I need to grow up because my filthy mind immediately turned your first sentence into smut as I was reading it. It doesn't help that the product itself does indeed look like a collar for your personal rod. I'll leave you to hit google yourself!

sadly not a vacuum flap .. and stop the sniggering ;-) .. it's a motor right at the back of the exhaust. PIWIS is an option I guess but perhaps a bit harder to revert than DIY - as you say, would need a friendly indie nearby with the latest s/w.

futie said: sadly not a vacuum flap .. and stop the sniggering ;-) .. it's a motor right at the back of the exhaust. PIWIS is an option I guess but perhaps a bit harder to revert than DIY - as you say, would need a friendly indie nearby with the latest s/w. So it's an electronic one? No tube connecting to the flap mechanism? Are you 100% sure? The Capristo upgrade for a 992 is run off a vacuum (from a quick Google).

Hoofy said: So it's an electronic one? No tube connecting to the flap mechanism? Are you 100% sure? The Capristo upgrade for a 992 is run off a vacuum (from a quick Google). Yeah, definitely wiring to the flap where there's a motor. See here for their 'valve controller' for 992 ($650) - they say 'electronic to electronic'.

I was wondering this the other day. I had a db9. Remove the fuse. Done. I had a carrera and a turbo s with sports exhaust The turbo s is better but frankly could still be more throaty.

992 noise? It's rubbish...end of thread

futie said: Hoofy said: So it's an electronic one? No tube connecting to the flap mechanism? Are you 100% sure? The Capristo upgrade for a 992 is run off a vacuum (from a quick Google). Yeah, definitely wiring to the flap where there's a motor. See here for their 'valve controller' for 992 ($650) - they say 'electronic to electronic'. That's annoying. I found this: https://jfautomotive.co.uk/product/armytrix-exhaus... I'd probably see if I can get an aftermarket exhaust system and someone who can swap it out cheaply/quickly if you need to take the car in to Porsche. Or get a Gundo-hack done to bypass the box/valve on a spare OEM system and swap it out when you need to take it in.

I was going to go down the exhaust valve controller route for my 992 C2S. They are ridiculously expensive for what they are though at £650. The one for my F82 M4 that did the same thing was £250! Just having flaps open wouldn’t really appeal as I don’t want it stupid loud for cold starts.

I think I have a solution for 'permanently open'. Easy to fit - can do it without jacking the car up or removing engine cover - no dashboard lights, no issues so far. Certainly louder on cold start - more crackles in all drive modes - more 'fruity'. But I wouldn't say it is any noisier than cars I've had previously - M3/M5 spring to mind. Not particularly loud at speed - almost feels like how Porsche might have designed it to sound with PSE before the regulatory department got involved .. We're off on a little European jaunt next week and I plan to leave this in place to see how it behaves. Have an idea how it could be made switchable too, and even variable .. but that'll have to wait till I'm back :-D

I just put fabspeed back boxes on a 997 many years ago, sounded epic afterwards. 992 factory sports exhaust on my car just makes a flatulent noise a bit louder

bennno said: I just put fabspeed back boxes on a 997 many years ago, sounded epic afterwards. 992 factory sports exhaust on my car just makes a flatulent noise a bit louder I think the turbos do that. Seems to be the same for any flat 6 turbo unless you remove the cat and silencer!?

futie said: I think I have a solution for 'permanently open'. Easy to fit - can do it without jacking the car up or removing engine cover - no dashboard lights, no issues so far. Certainly louder on cold start - more crackles in all drive modes - more 'fruity'. But I wouldn't say it is any noisier than cars I've had previously - M3/M5 spring to mind. Not particularly loud at speed - almost feels like how Porsche might have designed it to sound with PSE before the regulatory department got involved .. We're off on a little European jaunt next week and I plan to leave this in place to see how it behaves. Have an idea how it could be made switchable too, and even variable .. but that'll have to wait till I'm back :-D Ok, what have you done? Can we have a listen?

Well i'm definitely no youtuber (thank goodness) but I coerced my son to take some videos and I stitched them together. Cold start, warm start, launch, drive by, etc. https://www.youtube.com/watch?v=EMvt13C10kQ

futie said: Well i'm definitely no youtuber (thank goodness) but I coerced my son to take some videos and I stitched them together. Cold start, warm start, launch, drive by, etc. https://www.youtube.com/watch?v=EMvt13C10kQ Well done! So what did you do exactly? For me that would be just right. Not crazy loud but not quiet.

Hoofy said: futie said: Well i'm definitely no youtuber (thank goodness) but I coerced my son to take some videos and I stitched them together. Cold start, warm start, launch, drive by, etc. https://www.youtube.com/watch?v=EMvt13C10kQ Well done! So what did you do exactly? For me that would be just right. Not crazy loud but not quiet. Sorry for the delay - we went off for a few days and 1000 miles in Europe with a couple of prototypes installed. It worked really well! I guess it depends on what sort of driving you do and what sort of noise you like but I'm not planning on removing them! So I thought I'd offer them for sale if anyone is interested - see 992noise.com .

£34 sounds like a bargain for the improvement in sound. If I had a 992 I'd buy one. (I'll overlook the fact that this whole thread seems like you're setting this up as some kind of marketing exercise. )

Hoofy said: £34 sounds like a bargain for the improvement in sound. If I had a 992 I'd buy one. (I'll overlook the fact that this whole thread seems like you're setting this up as some kind of marketing exercise. ) Haha - you're right - it does look hugely like that!! Promise it isn't - will keep quiet now just incase it makes it worse! Was a genuine attempt at sharing what I was doing - kinda hoped that someone else had done this, actually, and could save me buying the stuff and doing all the electricals.

Im very interested in this. I’m hopefully picking up a 992 GTS cabriolet this week and was going to look into an exhaust mod. I’ve never owned a Porsche before but when I test drove it I noticed it had that exhaust button on the dash. If I fit this mod, would it not just be the same as pressing the exhaust button (but without the need to press the button each journey)?

Hi, is this instead of the sports exhaust button? Does it basically do the same thing or is this an improvement in noise above of what the sports exhaust button produces?

futie said: Hoofy said: £34 sounds like a bargain for the improvement in sound. If I had a 992 I'd buy one. (I'll overlook the fact that this whole thread seems like you're setting this up as some kind of marketing exercise. ) Haha - you're right - it does look hugely like that!! Promise it isn't - will keep quiet now just incase it makes it worse! Was a genuine attempt at sharing what I was doing - kinda hoped that someone else had done this, actually, and could save me buying the stuff and doing all the electricals. I was going to ask - I guess it isn't just some kind of bung but has something clever in it that tricks the electronics into keeping the flaps open (fnar) without giving any kind of engine light warning? Can you go more into what you've done without giving away any secrets? (Not that I'm technical enough to want to try ripping off your idea.) I get how vacuum-based systems work. Also, could you create something for older cars to say disable the spoiler warning function for people who replaced their spoilers with fixed systems? I want to disable mine without giving a warning light every time the car tries to raise the spoiler. The system that is currently for sale went from £100 to £300 overnight.

Folks, mindful of Hoofy's observation I don't really want to chat too much here about something I'm selling- even if I'm just covering costs right now. Drop me an email at [email removed] and i'll respond.

futie said: Folks, mindful of Hoofy's observation I don't really want to chat too much here about something I'm selling- even if I'm just covering costs right now. Drop me an email at [email removed] and i'll respond. Well done for giving it a go and getting something out to the market and best of luck!

Northcote67 said: Hi, is this instead of the sports exhaust button? Does it basically do the same thing or is this an improvement in noise above of what the sports exhaust button produces? Did you get an answer to this?

Blu3R said: Northcote67 said: Hi, is this instead of the sports exhaust button? Does it basically do the same thing or is this an improvement in noise above of what the sports exhaust button produces? Did you get an answer to this? It sounds like it keeps the valves open permanently. I am guessing the sports exhaust button would mean that the flaps are closed upon start up?

Hoofy said: Blu3R said: Northcote67 said: Hi, is this instead of the sports exhaust button? Does it basically do the same thing or is this an improvement in noise above of what the sports exhaust button produces? Did you get an answer to this? It sounds like it keeps the valves open permanently. I am guessing the sports exhaust button would mean that the flaps are closed upon start up? From my limited understanding (which could be completely wrong of course) the electronic valves vary flap position depending on conditions like revs, throttle position and mode. The PSE will let you start with them open if the button is pressed before you start the car (but how 'open' is open...?). I'm guessing the kit does as you say - holds the flaps open fully at all times, but would be nice to have that confirmed.

Blu3R said: From my limited understanding (which could be completely wrong of course) the electronic valves vary flap position depending on conditions like revs, throttle position and mode. The PSE will let you start with them open if the button is pressed before you start the car (but how 'open' is open...?). I'm guessing the kit does as you say - holds the flaps open fully at all times, but would be nice to have that confirmed. Yep - totally correct. Standard PSE operation is to open & close the flaps when you're driving around, even when the sports exhaust button is pressed. That extra noise you hear at idle when you push the button is the flap opening only a small amount. There are some videos online which show the movement of the flap at different speeds/loads. For me, that just felt like I was being cheated a bit!

futie said: Yep - totally correct. Standard PSE operation is to open & close the flaps when you're driving around, even when the sports exhaust button is pressed. That extra noise you hear at idle when you push the button is the flap opening only a small amount. There are some videos online which show the movement of the flap at different speeds/loads. For me, that just felt like I was being cheated a bit! Is it compatible with a 2024 992 GTS?

Hi Futie I've tried emailing you at 992noise but I've had no reply. I was enquiring to buy a valve controller for my 992.2 Carrera Thanks Anton

I am interested in one. I hsvd just mailed him as well!

The option to buy has been gone from the site for a while and I never received a reply to my email. Perhaps he’s stopped doing them? Shame, because I’d finally decided to take the plunge.