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ericvv



Member Since: 02 Jun 2011
Location: Near the Jet d'Eau
Posts: 5816

Switzerland 2009 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black
languedoc wrote:
Im going to stick to driving the series 3 because I'm pretty sure it cant get to 70kph anyway. Or at least I don't have the onions to try!


Depending on which road you drive on, be careful to not get a ticket for driving too slow. Shocked
The French need to cash in all the taxes they can get. Rolling Eyes
Eric You never actually own a Defender. You merely look after it for the next generation.
http://youtu.be/yVRlSsJwD0o
https://youtu.be/vmPr3oTHndg
https://www.youtube.com/watch?v=_GtzTT9Pdl0
https://www.youtube.com/watch?v=ABqKPz28e6A
https://www.youtube.com/watch?v=rLZ49Jce_n0
https://www.youtube.com/watch?v=XvAsz_ilQYU
https://www.youtube.com/watch?v=K8tMHiX9lSw
https://m.youtube.com/watch?v=dxwjPuHIV7I
https://vimeo.com/201482507
https://www.youtube.com/watch?v=ZSixqL0iyHw
Post #622916 9th May 2017 2:23pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 529

France 2009 Defender 90 Puma 2.4 SW Alaska White
Stacey007 wrote:
I use my Ultra guage as the speedo, I can see it easier than the actuak speedo


What you read on the ultra-guage is the actual speed computed by the ECU, based on the TB sensor reading (iirc), these values are quite accurate as long as the tyre setting is correct, obviously.

The speedo shows a higher speed as per the legislation, as mentioned previously. “A Land Rover immobilized is a moral defeat for the driver and bad publicity for the vehicle, […] it's up to you to do justice to your Land Rover!” - Land Rover Driving Technique.
--
2009 2.4 Puma Defender 90 SW
1979 Land Rover Series 3 88"
Post #622918 9th May 2017 2:30pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Earlier this year a chap on another forum I participate in received a ticket for doing 119 mph past a speed camera in a 40 limit. In a Defender 110 ! Rolling with laughter

Whilst I am sure that there are 110s on this forum that could potentially do that, this is apparently a bog standard work truck, complete with the factory speed limiter.

Naturally he queried it with the issuing authority (I suspect along the lines of "you're having a laugh") and received an apology and the explanation was that there was a camera malfunction.

All of which made me think that it was a good thing that the malfunction caused his speed to be reported as unbelivably high; he'd have had far more trouble if it had incirrectly recorded him as travelling at say 50mph.
Post #622920 9th May 2017 2:35pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
o4dn wrote:
Stacey007 wrote:
I use my Ultra guage as the speedo, I can see it easier than the actuak speedo


What you read on the ultra-guage is the actual speed computed by the ECU, based on the TB sensor reading (iirc), these values are quite accurate as long as the tyre setting is correct, obviously.

The speedo shows a higher speed as per the legislation, as mentioned previously.


It is a great shame that LR, in their wisdom, only allowed the selection of one of three presets for tyre size. It would not have been hard to set the ECU up to allow any tyre size to be entered, so those of us with other sizes could easily calibrate our speedo.

As it happens, I have checked mine with a Home Office approved timing device against Dorset Police's measured calibration markers since fitting 255/85 KM2s, and it is spot on across the board. On 7.50s it predictably over-read across the board.

Incidentally legislation does not require that the speedo shows a higher speed than actual. Legislation requires that a speedometer does not under-read at all (it must never indicate a lower speed that is actually happening) and must be accurate to 10% of actual speed. So it must have an accuracy of -0%, +10%.

It would be inordinately expensive to make a speedo which was guarenteed not to underead, since typically a quality speedo, at least one of traditional construction, is accurate to +/-5%, so the conventional solution is to make a speedo which is designed to under-read by 5% and has +/-5% accuracy, since this will result in the desired legal -0% +10% end product.

With modern technology however there is really no excuse for not having a true calibrated speedo.
Post #622921 9th May 2017 2:39pm
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Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
Using a Scangauge for more accurate speed display - compares favorably with Garmin GPS readings. Except for being more accurate - the digital display also easier on the eye than the analog OEM gauge. On a previous vehicle - changing to different circumference tyres and rims got the speedo spot on but the odometer went out of range again - with effects on mileage before going for service and calculating fuel consumption (manually) again.
Post #622968 9th May 2017 7:03pm
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Hairy Dan



Member Since: 25 Apr 2013
Location: NW Durham
Posts: 1313

United Kingdom 1998 Defender 90 V8 Petrol 50th Auto Chawton White
AM94 wrote:
Sounds like your best bet is one of these then:-

AM94 wrote:


The other option is one of these:-

http://www.demon-tweeks.co.uk/motorsport/s...peedometer


You can find them on eBay as well.

Or follow O4DN's route and get the ECU reprogrammed.


I have that very digital gps speedo in my Japan Spec Defender as the original speedo is in KM's Cheers Ian
--------------------
22MY Defender 110 D200 SE, Fuji White.
Kielder 4x4 Safari
Instagram @defender_v8
Post #623010 9th May 2017 9:02pm
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
blackwolf wrote:

With modern technology however there is really no excuse for not having a true calibrated speedo.


Tyre wear and pressures will affect the calibration. On my L322 satnav there was an option for wheel calibration, which you were supposed to run everytime you fitted a new set of tyres. Nearly worn out tyres will be slightly smaller (and therefore turn faster to cover a given distance) than brand new ones.

I'm not sure a Defender could be described as "Modern Technology" mind you. Laughing

But i'd agree on a modern car, especially one fitted with built in satnav it would be realitively easy to have an automatically calibrating 99% accurate one.
Post #623031 9th May 2017 9:47pm
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