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lambert.the.farmer



Member Since: 11 Apr 2012
Location: harrogate
Posts: 2006
England 1998 Defender 90 300 Tdi PU Rutland Red
parting air
A defender is as we know as efficient as a house at cutting through air. Does anyone out there do leading-edge air deflectors for the front wings and leading-edge of the cab. I ask as all I can find on Google is window shields. I'm thinking that if air is redirected horizontally rather than vertically some mpg could be gained?
Any ideas? Rhubarb and custard let fly with their secret weapon.
Post #170903 26th Sep 2012 6:43am
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defender4



Member Since: 22 Jun 2011
Location: South East London
Posts: 411
United Kingdom 2007 Defender 90 Puma 2.4 XS CSW Java Black
A couple of years ago JE Engineering were supposed to be carrying out tests on some sort of aerodynamic modification for the Defender. However, to the best of my knowledge nothing ever came of it which probably indicates that the Defender is beyond help when it come to aerodynamic efficiency.
Post #170911 26th Sep 2012 7:40am
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Glynparry25



Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015
Wales 2009 Defender 110 Puma 2.4 XS DCPU Tonga Green
^^^That is probably about right.

Even if there were things to deflect air you would probably have to do about 30,000 odd miles to recoup the cost of the items Rolling Eyes

Glyn Dog Sheep
Post #170915 26th Sep 2012 7:55am
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megatoad



Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358
United Kingdom 2006 Defender 110 Td5 XS CSW Zambezi Silver
Re: parting air
lambert.the.farmer wrote:
A defender is as we know as efficient as a house at cutting through air. Does anyone out there do leading-edge air deflectors for the front wings and leading-edge of the cab. I ask as all I can find on Google is window shields. I'm thinking that if air is redirected horizontally rather than vertically some mpg could be gained?
Any ideas?


Streamlining a Defender Rolling with laughter trying to improve fuel efficiency Rolling with laughter thats really made my morning.
Post #170935 26th Sep 2012 9:23am
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T1G UP



Member Since: 08 Dec 2009
Location: Bath
Posts: 3101
England 2011 Defender 110 Puma 2.4 XS CSW Orkney Grey
Re: parting air
lambert.the.farmer wrote:
A defender is as we know as efficient as a house at cutting through air. Does anyone out there do leading-edge air deflectors for the front wings and leading-edge of the cab. I ask as all I can find on Google is window shields. I'm thinking that if air is redirected horizontally rather than vertically some mpg could be gained?
Any ideas?


obviously a slow day eh?
Post #170936 26th Sep 2012 9:25am
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6185
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
8x4 sheet of MDF..... place the top end across the windscreen then angle it down over the bonnet.


YOu might need to cut a viewing hole so you can see where you're heading though! Whistle
Post #170940 26th Sep 2012 9:30am
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Thud



Member Since: 21 Jul 2012
Location: London
Posts: 667
United Kingdom 2008 Defender 90 Puma 2.4 SW Zermatt Silver
Drill large holes in the chassis to lighten things up. Much better MPH then.
Post #170945 26th Sep 2012 9:56am
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megatoad



Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358
United Kingdom 2006 Defender 110 Td5 XS CSW Zambezi Silver
diesel_jim wrote:
8x4 sheet of MDF..... place the top end across the windscreen then angle it down over the bonnet.


YOu might need to cut a viewing hole so you can see where you're heading though! Whistle


You could also strap a Dyson underneath to get more downforce, until of course the plug get yanked out from the socket Very Happy
Post #170946 26th Sep 2012 9:56am
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lambert.the.farmer



Member Since: 11 Apr 2012
Location: harrogate
Posts: 2006
England 1998 Defender 90 300 Tdi PU Rutland Red
Omg the positive enthusiasm is deafening. Rolling with laughter

When I come up with an effective solution I'll let you all buy a set at mates rates. Very Happy

And yes it is a slow day, anything to take my mind off laying flags. Rhubarb and custard let fly with their secret weapon.
Post #170954 26th Sep 2012 10:29am
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4801
United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
It seems any mention of tyring to improve the mpg of a defender is frowned upon. But here i go anyway. Would a lightweight steering guard that is solid without any holes in it help to direct the air under the car and away from the axles? Then it might reduce drag a bit? Confused 2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton
Post #170959 26th Sep 2012 10:41am
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443
England 2002 Defender 110 Td5 SW Coniston Green
I'm sure one of the comics took a 90 up to the Britpart headquarters to see how they could get the most mpg out of it. They started off lightening it, putting road tyres on it and it ended up "streamlined" All excess panels were taken off, roof, sides, doors, windscreen anything that would unbolt. Then they shrink wrapped IIRC Kev Mills into it and sent him on his way. I think it got into the high 40's on the mpg front.
I think that to streamline a Defender, the leading edge of the kit will be about 10m out in front of the bumper! It's bad enough pulling out on some of the junctions round here without having to sit even further away from the white line Whistle
Post #170964 26th Sep 2012 10:45am
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megatoad



Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358
United Kingdom 2006 Defender 110 Td5 XS CSW Zambezi Silver
grafty99 wrote:
It seems any mention of tyring to improve the mpg of a defender is frowned upon. But here i go anyway. Would a lightweight steering guard that is solid without any holes in it help to direct the air under the car and away from the axles? Then it might reduce drag a bit? Confused


Got one, still only 25mpg, but then there is the roofrack Cool
Post #170968 26th Sep 2012 10:52am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2669
South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
the most efficient aerodynamic upgrade you can do on a Defender is to put a spare wheel on the bonnet. --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #170974 26th Sep 2012 11:49am
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610
United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Naks wrote:
the most efficient aerodynamic upgrade you can do on a Defender is to put a spare wheel on the bonnet.


As is getting your haircut, trimming your toe nails, not wearing socks and leaving your undercrackers at home for added weight saving. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #170975 26th Sep 2012 11:56am
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twopoint6khz



Member Since: 18 Aug 2011
Location: North Lakes
Posts: 655
United Kingdom 2005 Defender 110 Td5 CSW Java Black
Get an old soft-top, put the roof down, screen folded flat, duck behind the steering wheel and use a periscope.
Post #170978 26th Sep 2012 12:09pm
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