Post #1
Thats the brief, is it possible? Obviously putting larger boxes on should bring down the noise but will that also restrict power?________________________________________
Just Drive It
|
displaying posts 1 to 9 of 9
| Author | Subject: Quieten without restricting power? |
 rallyestyle
Seasoned Pro  Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
|
 Posted 27th Aug 2010 at 14:39
|
|
|
mabgti
NV motors  Location: Bham tunnel @7400rpm Registered: 28 Aug 2003 Posts: 9,127 Status: Offline |
Post #2
haha.. you seem my predicament..the longer it takes for gases to exit.. the less power.. so the more space (in a box) the slower the exit from it.. ________________________________________ Team Supercharged Gti-6NV Motorsport Automotive Performance Tuning 0121 448 7515 ECU Remapping/ DPF removal VAG/BMW Diag and Option Coding Peugeot Planet ECU coding/transponder programming etc www.nvmotorsport.com Facebook Page Project S6 |
|
Posted 27th Aug 2010 at 16:24
|
|
|
bobdylan_55
Seasoned Pro  Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #3
mabgti wrote: haha.. you seem my predicament.. the longer it takes for gases to exit.. the less power.. so the more space (in a box) the slower the exit from it.. not always the case. A certain amount of back pressure is needed to help the air flow better, so simply putting a massive 5" straight through exhaust would reduce power. However you are right that it will be hard to increase power without making it louder. The simplest form would be a remap. This shouldnt affect noise levels much if any at all. Secondly, some exhaust systems can be custom made that flow better and are still quietish because of different designs and materials used in the boxes. Another good one is turbo, as the turbo seems to dampen most of the noise before it enters the exhaust. ________________________________________ 309 GTi6-T |
|
Posted 27th Aug 2010 at 16:38
|
|
|
rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #4
mabgti wrote: haha.. you seem my predicament.. Yep  Not gonna go centre exit though  The Rallye sounds the nuts but its just too loud for crawling around town sometimes which is 95% of what i do. Down a country lane its like the WRC is in town  ________________________________________ Just Drive It |
|
Posted 27th Aug 2010 at 17:44
|
|
|
rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #5
bobdylan_55 wrote: Another good one is turbo, as the turbo seems to dampen most of the noise before it enters the exhaust. Why not, claerly the best option   Has anyone any experience with exhaust by-pass valves? ________________________________________ Just Drive It |
|
Posted 27th Aug 2010 at 17:45
|
|
|
mabgti
NV motors Location: Bham tunnel @7400rpm Registered: 28 Aug 2003 Posts: 9,127 Status: Offline |
Post #6
bob.. all that means nothing to his supercharged 6.________________________________________ Team Supercharged Gti-6NV Motorsport Automotive Performance Tuning 0121 448 7515 ECU Remapping/ DPF removal VAG/BMW Diag and Option Coding Peugeot Planet ECU coding/transponder programming etc www.nvmotorsport.com Facebook Page Project S6 |
|
Posted 27th Aug 2010 at 17:54
|
|
|
rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #7
mabgti wrote: bob.. all that means nothing to his supercharged 6. Thats true, but i have a sc rallye, faster than these pesky sc 6's  ________________________________________ Just Drive It |
|
Posted 27th Aug 2010 at 18:16
|
|
|
cosmic spanner
Moral objector  Location: North London Registered: 11 Oct 2004 Posts: 10,399 Status: Offline |
Post #8
Yep, been there.. initially my H&S system was too loud (but only at certain revs.. the exact revs I sat on the motorway  ). As we worked through the options, Ian's advice was to leave the centre section alone as messing with that would restrict power the most - and work on the rear box where there was more scope as the gasses are cooler back there (or I think that's how I remember him explaining it). By dumping the spare wheel (which I'd pretty much decided to dump anyway) he built me a larger rear box that ate into the former spare cage area - net result much more acceptable and no loss of power (I did some back to back 0-100 tests on the old runway to check  ).________________________________________ Democracy is two wolves and a lamb voting on what to have for lunch....Liberty is a well-armed lamb contesting the vote. Project é - my 306 project thread. |
|
Posted 27th Aug 2010 at 19:14
|
|
|
rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #9
Thanks mike, i havent had a spare wheel or the cage for 6 years so i think your way is the best option Oddly enough my car is better on the motorway with the decat on, will sit at 80 with minimal noise, just every other speed where it sounds like the apocalypse ________________________________________ Just Drive It |
|
Posted 27th Aug 2010 at 19:17
|
|
The Peugeot GTi-6 & Rallye Owners Club - ©2024 all rights reserved.
Please Note: The views and opinions found herein are those of individuals, and not of The Peugeot 306 GTi-6 & Rallye Owners Club or any individuals involved.
No responsibility is taken or assumed for any comments or statements made on, or in relation to, this website. Please see our updated privacy policy.