|
|
|||||||
| D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
 |
|
|
Thread Tools | Display Modes |
|
#1
12th March 2009, 03:09 PM
|
||||
|
||||
Benefits of a cross-pipe...?
....and another question:
Anyone spliced one in to a standard exhaust? Is it all about the sound? I'm looking for a better sound, but really not at all bothered about changing the tips. Ta, Zip 
|
|
#2
12th March 2009, 03:38 PM
|
||||
|
||||
|
In a nutshell..
1. It balances out then pulses of the V8 making a more pleasant sound. 2. Combined with tuned primaries and secondaries it will allow better scavenging of cylinders. Good theory articles here & here. Most people have them just behind the cats. I have mine at the rear diff.
__________________
Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. 
|
|
#3
13th March 2009, 08:27 AM
|
||||
|
||||
So quieter or louder...or more "woofly"...?
...the articles suggest that the system will actually be quieter. True?
Without going under the car I am assuming I have an H-pipe already...? Can't yet work out from the physics if the X-pipe should be nearer to or further from the exhaust manifold... Zip
|
|
#4
13th March 2009, 04:07 PM
|
||||
|
||||
|
Yes you will have an H pipe, they are standard on the V8s
As to quieter or not then all the x pipe will do is smooth the tone as it allows the pulse which are uneven from a V8 to blend. With regard to positioning, theoretically the further from the primaries the lower the torque will peek. The nearer to the primaries the higher the BHP will be. It's all to do with exhaust gas and sound velocity. I have some more tech articles......... Here , Here 1, 2, 3, and here.
__________________
Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light.
|
|
#5
27th March 2009, 08:38 PM
|
|||
|
|||
|
Just found this might be of intrest
http://www.youtube.com/watch?v=RKUrJBTPXUo P.S luv the sound of the second clip beefy and deep sound mmm UPDATED TO PROPER LINK
__________________
Last edited by A8 Owner; 30th March 2009 at 05:38 PM.
|
|
|
|
Linear Mode
