Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
991 : 2011- 17
997 : 2004- 65
996 : 1997-2005 30
993 : 1993-1998 3
964 : 1989-1993 6
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 3
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 17
Cayman : 2005- 12
Cayenne : 2003- 3
Macan : 2014- 1
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 1
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [991] 2011-Current
Porsche 911 [991]
911 [997] 2004-Current
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Thu Feb 28, 2019 11:00 pm    Post subject: Reply with quote

Phil 997 wrote:
Your dilemma is all our dilemmas , its always hard to make a German flat 6 sound like an F1 and those that have managed to get close seem to be the high end players in the exhaust market , the likes of Akrapovik etc.

some of what you have researched is on the right track and headers do make a difference partly due to shape and partly due to more sound from stainless steel. but do you want headers like the X51 three branches into a straight pipe or equal length into a merge collector . I found that the 996/997.1 engine was more (in your terms tractor) than the 997.2 with the DFI engine which is more high pitched. but still not what I would call F1 with that European high scream sound.

CGR that you have already reached out to did make a nice custom job for one of the 997.1 members on here. it was around the 2k mark. also have a chat to topgear exhausts as they also manufacture them.

also as mentioned TUBI has a nice sound on the 996

https://www.youtube.com/watch?v=moMTLiEuBhE

heres a nice one seems a mix of Kline/topgear and tubi .if you said to Topgear "I want that sound they would probably know what you needed. dont forget forum members get 10% discount from Topgear.

https://www.youtube.com/watch?v=UrSSutd6wTI

kline

https://www.youtube.com/watch?v=5faVJ45J7lg

also consider whether big bore 200 cell cats will give you more the tone you want than std bore 200 cell cats , again topgear can help with that as they make both options .

Lastly and as already mentioned INDUCTION the howl from a free flowing induction does play a part in creating the sound your after . have you fitted the resonator delete and silicon hose with a BMC sports filter , thats the minimum place to start then look at single or twin cone performance induction . you will almost certainly need a remap if you go with something like fabspeed performance twin cone induction.

heres what I mean this is a race prepped 996 with fabspeed exhaust and induction

https://www.youtube.com/watch?v=DJc6It8v5is

but as Terry said whether any of it will be ok for the track db is another set of issues . but have a look at the vids as they may give you some thoughts and ideas Thumb Thumb

heres a vid of my 997.2 with 7k of exhaust and induction and its still not really an F1 sound ,so you may be chasing something thats you just cant fully achieve from the Porsche flat 6 engine.

https://www.youtube.com/watch?v=-AXOMSqjxjg


Thank you so much for such a detailed response. Very helpful and i liked the sound of the Kline in the videos.

I do want to point out that when i say ‘More F1 than Tractor on the Tractor to F1 scale’ i am not looking for a Formula 1 sound. Rather that on a relative basis i am looking for less low end ‘umph’ or boomyness (difficult to put words on this right!) and a sound more balanced towards the high end. Still a flat 6 sound.

Sounds like you have done your homework on the subject - are there any onlie resources you could point me to, to help understand how each element affects power and sound? I am wondering if having performance headers and cats along with a customer oversized silencers might be the solution for me.
 
  
View user's profile Send private message
   
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Thu Feb 28, 2019 11:05 pm    Post subject: Reply with quote

Armagreggon85 wrote:
I'm running Ebay headers, pse boxes and top gear 200 cell x pipe cats.

While I wouldn't necessarily say it screams like an f1 car, when I put the x pipe cats on the noise definitely went from tractor more towards f1. I would say it has a fruity howl now which is definitely down to the x pipe.

I'd love to send you some clips however my car Is still off the road following ims bearing failure last May. Its getting pretty tough staying positive after dropping the engine myself, having it rebuilt, fitting the engine now having to drop it out again after covering less than 300 miles. Anyhoo, that's a different story which I will update in due course. Worth a look at an x pipe....


Thanks. Didn’t realise x-pipes would smooth the sound out.
Sorry to hear about your engine issues - hope you get her back on the road and back to enjoying her shortly!
 
  
View user's profile Send private message
   
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Thu Feb 28, 2019 11:06 pm    Post subject: Reply with quote

coullstar wrote:
X-pipe definitely smoothes the sound out and you get less of the tractor style as you name it.

Will check out videos, thanks fo the info!
 
  
View user's profile Send private message
   
Dammit
Watkins Glen


Joined: 23 Sep 2016
Posts: 2082



PostPosted: Fri Mar 01, 2019 6:29 am    Post subject: Reply with quote

100% subjective, and anecdotal, but TG big-bore 200 cell cats and Cargraphic sports exhaust on mine sounds great.
_________________
My 996, AKA Project Ridiculous
 
  
View user's profile Send private message
   
asterix_the_gaul
Suzuka


Joined: 20 Dec 2008
Posts: 1235
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Fri Mar 01, 2019 10:50 am    Post subject: Reply with quote

jcharalambides wrote:
asterix_the_gaul wrote:
Swop out the 200cell cats for standard ones, second hand sets should be available, that will be a long way to improving the sound given what you have said you want.


Hi Asterix. Thanks for the suggestion, is the idea that the 200 cel cat makes everything louder or boomier? Or both?


Yes, louder and throatier, went from PSE on my 3.4 to add 200cell Straight cats and I found much as you did, probably a little less so as PSE is not quite as loud as the aftermarket switchable systems
_________________
1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15061
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Fri Mar 01, 2019 4:40 pm    Post subject: Reply with quote

Thank you so much for such a detailed response. Very helpful and i liked the sound of the Kline in the videos.

I do want to point out that when i say ‘More F1 than Tractor on the Tractor to F1 scale’ i am not looking for a Formula 1 sound. Rather that on a relative basis i am looking for less low end ‘umph’ or boomyness (difficult to put words on this right!) and a sound more balanced towards the high end. Still a flat 6 sound.

Sounds like you have done your homework on the subject - are there any onlie resources you could point me to, to help understand how each element affects power and sound? I am wondering if having performance headers and cats along with a customer oversized silencers might be the solution for me.[/quote]


heres my thought to your questions
Re Power the two biggest single gains came from the 200 cell cats and then the IPD throttle body plenum with a remap. theres no doubt that the induction noise helps with the overall sound achieved , as others have said X Pipe is a smoother note than straight 200 cell cats and the big bore better still IMO , the headers add volume and crackles and pops but cant comment on whether stainless gives a higher pitched note than stock . I used a set of stainless X51 style headers from the states on my gen1 on the gen2 the headers and cats are a single piece unit. the bit I think may affect the boom more is the type of back boxes and I wonder if fitting 200 cell cats and headers but with mild sports boxes might give you less boom and a softer more shrill note. combine that with a nice induction kit for some deep air sucking in whoosh and you may be at the sound your after. I would highly recommend a call to topgear exhausts as they also know very well the Kline set up you like and may well be in a position agree that if you came down to their Dorset HQ for a fit they could put headers and 200 cell cats on and then try both the mild sport and the sound sport boxes giving you a change to hear both before deciding which you wanted to settle on . it means a run to Dorset and maybe paying for a little more fitting time but you should then be sure you have tried the options .

heres a very early pic of my 997.1 no other mods just the valved back boxes

https://www.youtube.com/watch?v=az8rQLPjFfw

this vid is of member stabs car after he went down to Topgear and got them to fit the same set up that I had on my 997.1 which was headers, 200 cell big bore cats and valved sports boxes .

https://www.youtube.com/watch?v=26fjqA6eUt8

hopefully the two vids will give you an idea of the sound difference between just the valved back boxes and the whole exhaust set up .

neither car in either video had any induction changes at that point

heres a vid of just the fabspeed induction sound with a stock exhaust
I know its on a 997.2 but its the induction note I wanted you to hear

https://www.youtube.com/watch?v=2DGl5ruZP6c
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
View user's profile Send private message
   
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Fri Mar 01, 2019 11:05 pm    Post subject: Reply with quote

@Phil 997 Very useful feedback and thanks for the videos , I think I get what you mean by induction noise.

Overall this thread has been really helpful and allowed me to better understand how some of the things interact.

On the back of people’s comments here, I’ve watched quite a few videos to compare Straight vs X-pipe 200 cel cats and the x-pipes are clearly a big step in the direction I want to go in terms of exhaust pitch and smoothness. TopGear seem to be the guys to get these from in the UK so will call them at some point.

First step for me is going to be to have my silencers moded to bring overall noise down for track days. If this works well I will then change the cat to x-pipe, or alternatively one of the exhaust specialists I spoke to told me they can connect both existing cats to create the same effect as an x-pipe.

Thank you all for contributions here, all very helpful 🙌🏼
 
  
View user's profile Send private message
   
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Sat Mar 02, 2019 4:34 pm    Post subject: Reply with quote

Kingb4 wrote:
asterix_the_gaul wrote:
Swop out the 200cell cats for standard ones, second hand sets should be available, that will be a long way to improving the sound given what you have said you want.


Cheekily, if you do decide to swap out your 200 cell cats - I would be interested in buying them!


Hit me up if you are serious about this. I am very likely to go with x-pipe cats.
Cheers
James
 
  
View user's profile Send private message
   
jcharalambides
Newbie


Joined: 14 Jan 2019
Posts: 21



PostPosted: Mon Mar 11, 2019 4:31 pm    Post subject: Reply with quote

UPDATE: i'll be trying the Top gear x-pipe so if anyone is looking for 200 Cell straight pipes my Dansk will be available for cheap!
 
  
View user's profile Send private message
   
TopGear Exhausts
Approved Trader


Joined: 22 Feb 2018
Posts: 76
Location: Bridport, UK


PostPosted: Thu Mar 14, 2019 10:13 pm    Post subject: Reply with quote

Great to hear. Am happy to also offer to undercut the Kirssieg by 50%, for £6,000 fitted we will make it sound exactly how you want it within the DB limits Grin in fact I suspect we could do it for significantly less as a project the boys would love.

I'd give the X-Pipe cats a go first and see how you get on!
_________________
www.topgear.co.uk

 
  
View user's profile Send private message Send e-mail Visit poster's website
   
Y2K
Nürburgring


Joined: 08 Mar 2016
Posts: 406
Location: Hampshire


PostPosted: Fri Mar 15, 2019 9:08 am    Post subject: Reply with quote

Interesting topic. I don’t have anything technical to contribute, but here’s a clip of mine (standard exhaust GT3) vs Mr C’s (Top Gear exhaust, aftermarket manifold Carrera).

You may notice that mine has higher pitch.


Open Youtube Page

_________________
2005 996 GT3 mk2
1999 Integra DC2
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum