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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3997

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
I would be wary of mucking about too much with tyre pressures. There will absolutely be a reason why LR arrived at 48psi for a 110 rear. Without knowing why, it is risky straying too far just on feel and instinct. It could just be set for economy or tyre life, but it is just as likely to be to maintain acceptable temps to prevent failure, or it could be related to stability in emergencies. I would not trust the judgment of a mechanic or tyre fitter as they just cant have the necessary understanding of all the factors.

I always think back to the almighty cock up Ford/Firestone made with the US Explorer. In trying to get what in essence was a pick up truck to behave as a passenger car they arrived at a very low tyre pressure (26 psi) which resulted in tread separation, rollovers and numerous deaths. An extreme case but illustrates the importance of tyre pressure at highway speeds.

As an aside, I worked last year on a research project looking at HGV tyre failures, and the single biggest is cause is running them under inflated for expended periods leading to tread separation. 2007 110 TDCi Station Wagon XS
Post #747374 26th Dec 2018 2:12pm
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AndrewS



Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

United Kingdom 2013 Defender 130 Puma 2.2 SW Rimini Red
36 front 38 rear for normal use in my 130 I do go up or down depending on circumstances. 130's have feeling's as well you know Smile
Post #747377 26th Dec 2018 2:45pm
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sako243



Member Since: 08 Jul 2014
Location: Wales
Posts: 1186

Wales 1994 Defender 110 300 Tdi CSW Alpine White
Hmm. I'm slightly surprised at these "modern" Land Rovers preferring cruising at lower speeds. My Defender is a 300Tdi 110 CSW that I've converted into a utility. The whole vehicle bar upper bulkhead has been sound proofed (diy using Silent Coat) and still has original carpets.

It's running a 1.2 transfer box and 265/75R16 mud terrains and I've got to say she likes cruising at 65 for the first couple of hours and then after that (suspect gearbox and diffs have finally warmed up) prefers 75. This is with significant rust in the bottoms of the doors. I've welded up the passenger side but not got around to the drivers yet and its noticeable the noise coming through the gaps that remain.

Fronts and rears run at about 30/32psi any more and they don't wear that evenly. On a long motorway run returns low to mid 30s sat on or below speed limit and never drops below 26mpg.

Clearly they built them better in the old days Whistle

Oh and only now thinking about replacing the original door hinges after 24 years! Ed
82 Hotspur Sandringham 6x6
95 Defender 110 300Tdi
Post #747425 26th Dec 2018 7:30pm
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Adam17



Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

England 2004 Defender 110 Td5 XS CSW Java Black
Wow - that's great. Hope I get that longevity out of mine... Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html
Post #747513 27th Dec 2018 11:01am
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2078

United Kingdom 1984 Defender 90 200 Tdi HT Pennine Grey
I run my 90 at 30 psi all round and that's good for road, laning and off road.
Mo The Land Rover 90 - Many are called, few are chosen.
Post #747514 27th Dec 2018 11:04am
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sako243



Member Since: 08 Jul 2014
Location: Wales
Posts: 1186

Wales 1994 Defender 110 300 Tdi CSW Alpine White
I think the trick is they like to be driven, and driven hard. I don't moddly coddle mine but equally don't abuse it (well fix it if I do).

All of the drivetrain has been upgraded / replaced over the last 2 years (put two new lockers in and, my fault, let the transfer box run out of oil). Engine hasn't really been touched apart from oil changes and is on 185k at the moment. But need to look at head gasket and possibly injectors. But still not too bad considering I'm not the best at giving it regular oil changes. But it does get used daily which I think is the biggest advantage. Ed
82 Hotspur Sandringham 6x6
95 Defender 110 300Tdi
Post #747516 27th Dec 2018 11:07am
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Adam17



Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

England 2004 Defender 110 Td5 XS CSW Java Black
Mo Murphy wrote:
I run my 90 at 30 psi all round and that's good for road, laning and off road.
Mo


from the tyre place mine were all at 30 - and seemed over bulged where the tyre meets the road, so bumped them up to 36 front and 38 rear, look much better now, more natural and not like I have a puncture Laughing Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html
Post #747523 27th Dec 2018 11:52am
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ppad



Member Since: 16 Nov 2012
Location: now, UK S Coast
Posts: 218

United Kingdom 2005 Defender 90 Td5 HT Caledonian Blue
My 05 90 had to do the 1000km Chur (.ch) - Hants several times.
I figured that it needs to be comfortable at 110 k which is the standard continental M road. I had Ashcroft gear set fitted so it can do that all day.
If your truck is doing a lot of fast road work, it's fine to be slower than 9/10 vehicles, but you don't want to feel permanently embarrassed!
The important thing is that the speed you do for 6 hrs must be okay for you and your truck. Sold the much modified 110 2.8, in Oz
Brought the 90 home from Switzerland ...
Post #747555 27th Dec 2018 3:18pm
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Titan133



Member Since: 30 Dec 2016
Location: Dorset
Posts: 43

United Kingdom 2004 Defender 110 Td5 CSW Bronze Green
I completed the trip up north doing about 490 miles in a day. I eventually set the tyres at 36 front and 40 rear with light weight in the back, although I had two 9 foot long body panels on the roof rack on the outward journey. Overall mpg was only 28.5 which was a bit disappointing I think. I was travelling about 55-65 mph depending upon the lorry traffic but on the way home there was a lot of crawling/stop & start on the M6/M5. I overall the Defender performed well. ——————————
2004 110 TD5
Post #748194 31st Dec 2018 9:42am
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dkmlondon



Member Since: 15 Jun 2018
Location: London and Somerset
Posts: 14

United Kingdom 2006 Defender 110 Td5 XS CSW Cairns Blue
Good thread!

I do a lot of M-way driving, as well as a bit of slow stuff in my 2006 TD5 110

Have fitted the 1.2 transfer box, remap with usual upgrades and she goes happily all day long, 75/80 (GPS readout) drinking at 24/26 mpg.
Fitted a rev counter - as much out of curiosity! - and at these speeds she runs at 2,800 - 3,000 rpm. Comfortable.

I do run on 265x70 on the usual rims (saved me the inch I needed to get into the garage!) and it makes her quite brisk off the mark, and helps with the towing, but speedo about 6% fast. 34F/40R psi is usual.

A long run does mean I don't have to listen to management when I arrive home!
Post #750417 10th Jan 2019 9:21pm
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SteveK



Member Since: 21 Jan 2015
Location: Bromsgrove
Posts: 331

United Kingdom 2002 Defender 110 Td5 HT Rimini Red
My TD5 will happily cruise at 70 all day and would go faster if speed limits allowed! However, I tend to stick around 60 - 65 mph on motorways because higher speeds dramatically increase fuel consumption and also conversation becomes more difficult above 65 mph!!
Post #751354 15th Jan 2019 7:05am
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Adam17



Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

England 2004 Defender 110 Td5 XS CSW Java Black
Agreed mine will sit happily at 70, and comfortably overtake if needed.

But for fuel economy im generally sitting between 50-60. Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html
Post #751637 16th Jan 2019 10:55am
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Titan133



Member Since: 30 Dec 2016
Location: Dorset
Posts: 43

United Kingdom 2004 Defender 110 Td5 CSW Bronze Green
I struggle to overtake from 60, let alone 70! Is yours tweaked or standard performance? ——————————
2004 110 TD5
Post #751667 16th Jan 2019 12:49pm
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Adam17



Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

England 2004 Defender 110 Td5 XS CSW Java Black
Pm'd buddy. Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html
Post #751669 16th Jan 2019 1:10pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2239

United Kingdom 
My 110 sits happily at 65mph.
I did try one with the Discovery transfer box but found that it made first and reverse gear a bit high. Mine will sit at 75mph and at that speed the engine actually becomes quieter, but l prefer to just sit at 65mph.

It’s got a mild remap so will maintain the speed up most hills. I’ve got a Nakatanenga cruise control kit to fit and that will likely make long journeys a lot more relaxing.
Post #751671 16th Jan 2019 1:13pm
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