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| Author | Subject: Rear Diffuser |
 welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #76
daveyboy wrote: I have fancied making one for some time, but as I mentioned, DMN doesn't allow underfloor aero apart from a front splitter, and even that is strictly goverened as to how far the tray of the diffuser can extend back under the front of the car. can you fit the oem undertray?  ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
 Posted 30th Apr 2012 at 21:13
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #77
welshpug! wrote: daveyboy wrote: I have fancied making one for some time, but as I mentioned, DMN doesn't allow underfloor aero apart from a front splitter, and even that is strictly goverened as to how far the tray of the diffuser can extend back under the front of the car. can you fit the oem undertray? Yeah thats allowed  ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 30th Apr 2012 at 21:26
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cjm_harris
Seasoned Pro  Location: Parts for Sale section Registered: 04 Dec 2007 Posts: 7,442 Status: Offline |
Post #78
phillipm wrote: Not quite as much as you'd expect, the airflow stalls under there and forms an air dam anyway. Thats what I thought was said last time this was discussed. Air will occupy the void under the car (where spare wheel used to be) so other air will pass by it as the space is already occupied with air  Obviously a diffuser would make it better, but pointing out the "parachute" effect may not be as bad as people imagine. ________________________________________ Chris1999 China Gti6 Supercharged  [Fun car] >>Project Thread<<2000 Bianca 306 Diesel [Work runabout] |
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Posted 1st May 2012 at 11:52
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buzzbrightyear
Seasoned Pro  Location: hiding all receipts for car Registered: 09 Jul 2008 Posts: 11,901 Status: Offline |
Post #79
Only one way to test the theory,when's the next rolling road day?is anyone up for doing a run with the rear bumper removed? ________________________________________ andrew315rawson@live.co.ukMoonstone phase 7 gti6 My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1 |
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Posted 1st May 2012 at 15:51
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #80
would be worthwhile for a sprint or hillclimb car I'd imagine, given they go from a standing start.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 1st May 2012 at 16:10
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jimmyhackers
Seasoned Pro  Location: birmingham Registered: 14 Jun 2011 Posts: 1,144 Status: Offline |
Post #81
a lot of people are saying this is all pretty useless. I removed that offending section of the rear bumper in my 1.4 and noticed a lot of a difference past 50mph. Manly it pulled better upto top speed of 112mph and my fuel consumption dropped on long motorway journeys. As i will reitterate i just cut a section away no diffuser etc. my argument is if you took the section i cut out my bumper and stuck it on another 306 i reacon you would notice the extra drag/fuel consumption. ________________________________________ the world is changed by people in sheds |
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Posted 3rd May 2012 at 15:29
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #82
I'm surprised, I'd think it'd make it worse as then you're forcing airflow around the exhaust and beam area where it's currently pretty stagnant.You're latter argument is pretty invalid, aerodynamics is not just a section of standalone parts, it's a system. ________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM meEmail me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces. |
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Posted 3rd May 2012 at 15:34
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #83
So who is going to knock one of these up and be the guinea pig tester?  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 9th May 2012 at 15:18
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buzzbrightyear
Seasoned Pro Location: hiding all receipts for car Registered: 09 Jul 2008 Posts: 11,901 Status: Offline |
Post #84
Jimmyhackers will be along soon with an idea ________________________________________ andrew315rawson@live.co.ukMoonstone phase 7 gti6 My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1 |
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Posted 9th May 2012 at 15:44
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #85
buzzbrightyear wrote: Jimmyhackers will be along soon with an idea And blind us all with science...  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 9th May 2012 at 15:48
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buzzbrightyear
Seasoned Pro Location: hiding all receipts for car Registered: 09 Jul 2008 Posts: 11,901 Status: Offline |
Post #86
Exactly  ________________________________________ andrew315rawson@live.co.ukMoonstone phase 7 gti6 My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1 |
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Posted 9th May 2012 at 16:22
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scott-723
Regular  Location: stoke Registered: 14 Aug 2010 Posts: 222 Status: Offline |
Post #87
so then has anyone made one then, im thinking about the extra mpg to be saved ________________________________________ Platinum Silver GTI6 DOB friday 22/01/1999Xbox tag - pugway 306 |
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Posted 10th Jun 2012 at 16:41
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prism7guy
Seasoned Pro  Location: DoncastAAAAARGH Registered: 13 Jan 2008 Posts: 4,640 Status: Offline |
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Posted 10th Jun 2012 at 20:42
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #89
I can't believe this discussion is still going on, however if someone did come up with something that worked it would be cool.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 11th Jun 2012 at 06:22
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eddy_gti6
Seasoned Pro  Location: Durham Registered: 20 Oct 2008 Posts: 8,716 Status: Offline |
Post #90
Bit of an old subject. Cant believe no one has done this yet!  ________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 10th Jun 2014 at 21:55
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prism7guy
Seasoned Pro Location: DoncastAAAAARGH Registered: 13 Jan 2008 Posts: 4,640 Status: Offline |
Post #91
Didn't bother with a diffuser but I knocked up a rear undertray.   ________________________________________ Goldie the track car. |
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Posted 10th Jun 2014 at 22:09
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eddy_gti6
Seasoned Pro Location: Durham Registered: 20 Oct 2008 Posts: 8,716 Status: Offline |
Post #92
Oh yeah forgot about that you made. Did you notice any difference?________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 10th Jun 2014 at 22:10
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rallyestyle
Seasoned Pro  Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #93
Is that poly roofing sheet? ________________________________________ Just Drive It |
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Posted 10th Jun 2014 at 22:39
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buzzbrightyear
Seasoned Pro Location: hiding all receipts for car Registered: 09 Jul 2008 Posts: 11,901 Status: Offline |
Post #94
stan_306gti6 wrote: I can't believe this discussion is still going on, however if someone did come up with something that worked it would be cool. Looks like they just didThat looks spot on ________________________________________ andrew315rawson@live.co.ukMoonstone phase 7 gti6 My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1 |
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Posted 11th Jun 2014 at 00:29
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buzzbrightyear
Seasoned Pro Location: hiding all receipts for car Registered: 09 Jul 2008 Posts: 11,901 Status: Offline |
Post #95
stan_306gti6 wrote: I can't believe this discussion is still going on, however if someone did come up with something that worked it would be cool. Looks like they just didThat looks spot on ________________________________________ andrew315rawson@live.co.ukMoonstone phase 7 gti6 My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1 |
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Posted 11th Jun 2014 at 00:29
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prism7guy
Seasoned Pro Location: DoncastAAAAARGH Registered: 13 Jan 2008 Posts: 4,640 Status: Offline |
Post #96
eddy_gti6 wrote: Oh yeah forgot about that you made. Did you notice any difference? Can't say i did tbh, but usually i do a load of work to the car in one go so it's hard to pinpoint what exactly made the changes i experience. rallyestyle wrote: Is that poly roofing sheet? Yeah it's roofing sheet, tried and tested to 135mph on the autobahn and it survived. It keeps the battery that lives above it nice and clean too which is an added bonus. ________________________________________ Goldie the track car. |
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Posted 11th Jun 2014 at 06:05
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rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #97
I like the idea of it keeping things clean and dry(ish) under the car  If you spend a lot of time/money cleaning the underside up then it's nice to keep it clean ________________________________________ Just Drive It |
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Posted 11th Jun 2014 at 09:09
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RetroPug
Seasoned Pro  Location: Leicestershire Registered: 15 Jan 2013 Posts: 2,473 Status: Offline |
Post #98
I quite like that!What is it mounted to? I can obviously see one end is on the bottom of the bumper, but the other? Looks like you've got a smaller bit further back? ________________________________________ 61k miles Ph.1 Diablo '6 Project Thread |
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Posted 11th Jun 2014 at 09:20
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eddy_gti6
Seasoned Pro Location: Durham Registered: 20 Oct 2008 Posts: 8,716 Status: Offline |
Post #99
Got a nice big sheet of thin metal lying down at Jim' and a spare rear bumper off the black 6 I broke and loads of spare exhaust so think were going to have a mess around at the weekend and knock something up to see what it looks like. Side exit exhaust rear diffuser and flat floor the exhaust tunnel.exhaust is just rested under the car here. I have a spare set of black skirts I will whop to make room for the exhaust too.     ________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 11th Jun 2014 at 10:23
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #100
you'll need a small alloy tank to make that work safely...________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 11th Jun 2014 at 10:30
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