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
992 : 2019- 0
991 : 2011- 26
997 : 2004- 57
996 : 1997-2005 31
993 : 1993-1998 2
964 : 1989-1993 0
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 3
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 27
Cayman : 2005- 22
Cayenne : 2003- 7
Macan : 2014- 5
Panamera : 2009- 0
912-914-924-928-944-968 0
959 - CarreraGT - RaceCar 0
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 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
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
HSC911
Dijon


Joined: 23 Jul 2014
Posts: 7125
Location: Bedford


PostPosted: Wed Feb 12, 2020 1:18 pm    Post subject: Reply with quote

stucart wrote:
Superb work, really impressed with attention to detail and workmanship. worship


Agree

Thumb
 
  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15744
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Feb 12, 2020 3:28 pm    Post subject: Reply with quote

systech1 wrote:
C11BRA wrote:
First road test was at 8pm last night so with mechanical empathy, I was just running everything up to temperature, resetting steering angle sensors etc. Stopping at every service station for a quick check etc. Always a bit of burning off of oils, joint sealant etc. It can be quite smoky but wasn’t too bad. Got followed by the Police for a mile. I thought I was going to get a pull but didn’t.

So. No real performance runs yet. What I did notice is a sweet spot at about 2500 rpm where the sound just peaks with a buzz. Just lovely.

On my second service station stop I connected my temporary vacuum system to operated the 2 gundo valves for the first time. Both worked perfectly. And nice that they are just visible from under the bumper. Oh wow. Even at idle, it was transformed. I set off down the A1 towards home. Under the M25 flyover, I couldn’t resist an idiot blip. Really really nice sound. Not as viscous as the system I’ve just removed, but really deep and just perfect for how I wanted it to be.

All in all, I couldn’t be happier.

The quiet mode will be a blessing on our long Euro trips we hope to enjoy in the coming years and hopefully will pass the track day DB tests with ease. (Although the X pipe possibly makes it louder than stock. I’ve never driven a stock 996 or 997).

The idiot mode will be great for Ace Cafe meets & tunnel hunting with my 13 year old lad.

All I need to do now is figure out how to activate the valves via the GT3 (spoiler button delete) switch pack I installed recently. I already use the suspension & TC off buttons but I have pre-wired the redundant sport button for this very purpose. (My car is non sport). I truly hope I can work out how to use the spare sport signal to operate a relay & then the solenoid to make the exhaust mode operation appear to be factory fitted. Things like that give me a buzz.


DucatirRob, myself and others have used the OEM PSE switch panel via a latching relay (rather than via the ECU) to control the vacuum solenoid as described in detail here....http://911uk.com/viewtopic.php?t=116327&highlight=systech1.

Works very well and remembers the last setting as a bonus


Ah perfect that was the thread I was looking for to post up , I knew some had done it Thumb
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
View user's profile Send private message
   
C11BRA
Imola


Joined: 30 Mar 2015
Posts: 751
Location: North London. Herts.


PostPosted: Thu Feb 13, 2020 10:52 pm    Post subject: Reply with quote

Thanks guys.

Ok. After a bit of head scratching (thanks to pins 12 & 13 on the switch pack being reversed vs the Porsche wiring diagram) I finally worked out the wiring and with a bypass on the circuit board, I finally got the Sport switch to activate the exhaust valves (GT3 style....kinda).

Road testing tomorrow.




_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
View user's profile Send private message
   
C11BRA
Imola


Joined: 30 Mar 2015
Posts: 751
Location: North London. Herts.


PostPosted: Fri Feb 14, 2020 5:42 pm    Post subject: Reply with quote

With valves closed I did a DB test today. Approx 1 metre from the exhaust at 45 degrees.

https://youtu.be/YtSdVreclQE

Maxed out early at 102db. Very happy with that. Hopefully enough to pass 103/105 DB track day tests.

However, in Gundo 2” idiot mode. Well........

https://youtu.be/Pb8cbKhr0n8

Sounds incredible!!!!!
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
View user's profile Send private message
   
NickHappy
Montreal


Joined: 27 Apr 2014
Posts: 501
Location: W.Sussex


PostPosted: Fri Feb 14, 2020 8:46 pm    Post subject: Reply with quote

C11BRA wrote:
With valves closed I did a DB test today. Approx 1 metre from the exhaust at 45 degrees.

https://youtu.be/YtSdVreclQE

Maxed out early at 102db. Very happy with that. Hopefully enough to pass 103/105 DB track day tests.

However, in Gundo 2” idiot mode. Well........

https://youtu.be/Pb8cbKhr0n8

Sounds incredible!!!!!


Ooohhh - that sounds nice. Pleased with the quality of TopGear??
_________________
997 turbo Manual.
996 turbo Manual. ex.
 
  
View user's profile Send private message
   
C11BRA
Imola


Joined: 30 Mar 2015
Posts: 751
Location: North London. Herts.


PostPosted: Fri Feb 14, 2020 9:06 pm    Post subject: Reply with quote

NickHappy wrote:
C11BRA wrote:
With valves closed I did a DB test today. Approx 1 metre from the exhaust at 45 degrees.

https://youtu.be/YtSdVreclQE

Maxed out early at 102db. Very happy with that. Hopefully enough to pass 103/105 DB track day tests.

However, in Gundo 2” idiot mode. Well........

https://youtu.be/Pb8cbKhr0n8

Sounds incredible!!!!!


Ooohhh - that sounds nice. Pleased with the quality of TopGear??


Yes. Good value & quality was fantastic. Would highly recommend.
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
View user's profile Send private message
   
C11BRA
Imola


Joined: 30 Mar 2015
Posts: 751
Location: North London. Herts.


PostPosted: Fri Feb 14, 2020 9:27 pm    Post subject: Reply with quote

Final post on this thread will be when I tweak the pipe outlets with a couple of new joints. These will allow me to remove the tailpipes for occasional polishing.

Thanks for all your comments & kind words throughout this thread. I hope to meet some of you at meets & events. You’ll hear us coming (unless I’m in stealth mode!! Grin )
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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, 3, 4
Page 4 of 4

 
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