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Jamie_grieve

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Jamie_grieve last won the day on June 1

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About Jamie_grieve

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    South Lanarkshire

Previous Fields

  • Interests
    Making noise and mess with off highway toys, trucks and machines.
    Making noise with fiddle, flute and whistle.
    Gold panning and travel.

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  1. Can anybody in the know expand on this rather interesting quote? It also confirms that it is indeed just a tweaked discovery underneath, slapping some bigger ball joints on an ancient platform which was obviously found lacking in strength hardly inspires confidence. Despite everyone telling us how much more travel and how better something is in their opinion, can anybody actually show a picture to support their views that the D7U platform has more articulation than a live axle setup? The spring medium is of almost no consequence, I believe it's the tiny short arms and half shafts which will be the limiting factor. The lack of pictures thus far speaks volumes I think. That's the most concise writeup I've seen to explain the wheelbases. Why not just call them 100's and 120's to differentiate them from the originals and give them a chance to prove themselves in their own right? I flat out don't believe the testing has been on real rough ground or there's no way the exhaust could possibly have passed muster being the most exposed and vulnerable component hanging down under the rear subframe just waiting to get crushed. Most of our crossmembers have dents and axles have no paint underneath from hitting the ground, how could anybody think this was a good idea to have an exhaust here? It's literally between a rock and a hard thing!! It wouldn't get dented on a 6 axis tester I suppose, where are the videos or test results of it boulder bashing across some rivers? I also disagree with the statement that defenders were durable because they were uncomfortable to drive fast over rough terrain, that's nonsense, they were, and are durable because by virtue of their fairly unique construction they can and could be repaired easily by unskilled labour without special tools. I think the definition of rough terrain needs expanded into actually defining something like the 100m of offset foot high blocks like the Russians use in which case I doubt very much the replacement would fair significantly better. Despite my negative conjecture thus far, I think the new vehicle will be awesome in the SUV role and will undoubtedly help define the branding structure and bring profit in a way the defender never did.
  2. Yet again you show how little you actually read and understand peoples posts. I'm dyslexic and really struggle with reading sometimes. I hope you have a similar excuse. How do you propose to deal with the misaligned prop flanges with the wedges you suggest? We don't know the shackle length so wedges will cause a vibration from the propshaft hence the request for pictures. You of all people should know better.
  3. Can you take some pictures before you put the lowering blocks on so we can see what's going on please? You definitely have some unresolved issues that reconditioning components or changing the gearbox won't resolve. The lowering blocks will greatly compromise your off road capability and will severely restrict axle travel on the front as well as giving an uncomfortable ride. It sounds like a lot of trouble when all that was needed was a different front propshaft.
  4. You'll be fine if you just apply some mechanical sympathy to whichever method you choose. A pry bar on the ring gear can apply a huge amount of torque. If it's been sat for a long time pull the injectors out after loosening the two nuts on each side and pour oil into the bores. Don't put the injectors back in at this point!! Don't turn the engine without lubricating the bores. If it turns OK then use the starter to blow any remaining oil out before putting the injectors back in. Disconnect the fuel pipes from the lift pump too and have fresh diesel handy for starting it. Do not attempt to start it with the old filters connected as you may cause irreparable damage to the fuel system components. It'll probably have old CAV filters. What application is the engine for? Here's some manuals which are worth a look. http://www.moteur-perkins.com/uploads/catalogue/lettre/notice/manuel-perkins-ld-4-236.pdf http://www.endeavourowners.com/dscsn/info/manuals/4236M Workshop Manual.pdf Have fun and good luck with your project!!
  5. This image has been all over social media for days now. Apparently it was returning from the Goodwood festival of speed. I thought I might as well stick it up here for more conjecture.and whining about it too. There were a few positive comments along the lines of at least they're testing it. I think it's interesting for a number of reasons. 1. It's sitting up on wheel skates so it's probably safe to assume that the wheels can't easily be turned. Is that most likely to be a diff, transfer or gearbox issue? Electric handbrake? 2. If it can't be towed for whatever reason, how common will the fault be as I can't imagine much in the drivetrain design is going to change before a launch in September. Not being able to tow it could be an inconvenience. Would they be willing to do last minute changes to major components if testing showed a number of failures or would that just be passed onto warranty claims and extra spare parts made available? 3. What's hanging down underneath? I never thought about it before but there are no drive flanges as with a defender which can be quickly and easily pulled off to allow towing if a diff has a problem or for a suspended tow and it doesn't have enough ground clearance to safely crawl under and take off a propshaft. I wonder how easily the transfer case can be put in neutral with dead electrics for towing with the wheels on the ground? Will there be a mechanical or electrical only solution?
  6. I would keep the original width of the axles and move the wheels to suit as that will reduce the scrub radius and hopefully eliminate any need to trim the bumper or footwells. The slightly wider stance will add stability and effective articulation too. The only downside is keeping the original look but some cleverly folded up wheel arches along the top of the wing and wheelboxes will hardly take away from that and I think it looks better with the wider stance anyway.
  7. I would not suggest to use lowering blocks at all, especially if you use it off road. The reason you can't find any is it's the opposite of what most with a 4x4 would do as it will greatly restrict the already limited front axle travel. Instead, a better solution than lowering blocks would be a wide angle propshaft from Gwyn Lewis or somewhere. Firstly you need to identify which dampers and shackles you have as this will help determine the current castor angle possibilities and maximum suspension droop you have. You also don't want the suspension running 'topped out' all the time as it will quickly destroy your dampers so maybe the spring rate you picked might be a bit high? Are they a 'heavy duty' spring? Normal series dampers wouldn't allow the prop UJ's to bind regardless of spring type fitted so I guess there's something else going on.. It could also be you have an aftermarket or wrong front prop shaft. Check that your UJ's move to 27º. If not, get a new (preferably wide angle) propshaft. Also check everything including the clearance between the crossmember and the propshaft when the axle is hanging down by lifting off the bumper or chassis and the dampers are fully extended and don't do any of it at ride height which is irrelevant as your propshaft, UJ's etc have to operate throughout the whole suspension cycle. I'd also suggest that lowering blocks are a suspension modification which you'll need to advise your insurance about, a new propshaft isn't. Some pictures might be helpful too.
  8. While I'm being grumpy about people not paying attention and generally being unpopular: The Subaru and land cruiser which both look stock and on road tyres both get up the hill I was referring to. Please see the screenshots and be amazed in wonderment at their achievement The Range Rover fails twice. Maybe it got up when nobody was filming? The point I was trying to make is that there's nothing special about the Range Rover making it any more capable in this scenario. Maybe fording deep water or driving up lots of steps in China would show it in a better light? Maybe you thought I was referring to the really steep slippery hill that nobody was ever driving up but the range rover still managed to leave the front splitter on the ground? Yeah, that was just an embarrassment, but no, not that one. I will be the first to accept that this proves nothing, other than there's very little difference in all of the various independently sprung platforms with their own geometry and handling optimisation and their own versions of traction control. The Range Rover driver at this point maybe wasn't approaching it how you or I might but the point remains the same. I would argue that the g wagon even on road tyres would easily drive up there as its' basic configuration of long travel soft suspension with good essential angles (and differential locks) would allow it to do so. I'm sure a standard defender with open axle diffs would have got up that one too. The land cruiser here does have a solid rear axle too. Still on the topic of that video, I thought that when they were all driving down that hill waving their rear wheels in the air that I would be far more comfortable in a vehicle with live axles which could keep all 4 wheels on the ground. My god, we're having a debate concerning off highway prowess and there's a subaru forester being used as an example!! Maybe there's something wrong with the world?
  9. I think that they must have spent the last 5 years of defender replacement doing something, we know now it wasn't suspension, platform or drivetrain development so it could well have been optimising the button textures to look really rough and dangerous but actually make them really nice and velvety to the touch.
  10. I give up, does anybody here actually read the f#<>!ng posts that people put up? Not even two pages ago we covered this. Then he gave a very good answer. Then we moved on a little bit, there was some cherry picking over some awkward questions now we're here. I asked him how long he had been in the industry so I could use different analogies in our conversations and would pick ones appropriate to his time. Now we're all up to speed (bar those that obviously didn't bother to read the previous posts) can we move on?
  11. Your response about discomikey had zero relevance to the question I asked, which was, for how long he had being doing it for. I am very aware of what he does for a living and his signature and our discussions on earlier posts all make it pretty clear. If sidewall flex is undesirable for your application then why not use a larger rim? Maybe use a 20” rim in that scenario? You’re saying that changing low profile tyres is easier in your experience? OK. Not gonna argue with you on that one.
  12. I’m not sure what this is in response to? best way is to highlight the text you’re referring to then press “quote selection” and it’ll automatically come up in the answer box.
  13. Nope, sorry you’ve lost me here. Please use only facts and possibly numbers here to explain to me how a low profile tyre with the resultant smaller variation in dynamic contact patch and much higher frequency of response is more stable on 1. A corner with severe corrugations. 2. When it hits a bump in the road it can’t conform over. 3. A typical unmade rough track with stones and potholes Remember this is the defender replacement we’re discussing so there shall be no talk of asphalt or roads!! I’m just not buying into any concept that a low profile tyre is better off road than one with a greater than 75% aspect ratio. Maybe you can prove it with modern magic and show me for the dinosaur I might well be.
  14. What tech level and what harsh environments? Let’s keep cryptic answers for the cryptic forums. He’s been a very forthcoming contributor to this topic and one of the very few commenting who actually has some level of technical knowledge which I embrace rather than the blah blah which makes up most of the posts. I would prefer if there was a rule where every post had to have a number or fact in it. Maybe you misunderstood the point I was making about sidewall depth which is why I said “up to 33” and your referral to large tyres have no relevance to my point. I’ll try to explain my position on the subject for clarity: The ability of a tyre to conform to the contours of an uneven surface is an essential attribute of an off highway tyre. This is more or less completely lost on a 30” tyre with an 18” rim. As the rim size goes up and the overall tyre diameter remains the same at say 30” then progressively less sidewall remains available to allow the tyre conform to contours. A 22” rim with a 30” diameter tyre would be like the worst case scenario but people still do it. A taller rim and lower profile tyre means that when you’re actually using a vehicle in a harsher environment than Chelsea or when you gently bump the kerb dropping the kids off at school then you don’t dent the rim. There’s a lot more to a tyres traction on slippery surfaces than just the tread pattern . Tell me of any off highway motorsports where low profile tyres are the preferred norm? Have you ever personally tried changing a low profile tyre on a rim compared to a standard 85% aspect ratio? Which tyre will remain inflated longer with a small spinifex bush type puncture? Which tyre will absorb potholes and stones or rough surfaces better? which tyre will impart lower forces to the suspension and drivetrain? Remember this is a DEFENDER replacement we’re discussing here, if this were a new discovery I would agree with every point that yourself and Mike and Fridge has raised and there would be no topic but the tyres that we have seen thus far in testing are yet another aspect of this vehicle, like the suspension and drivetrain that does not look as though it has been designed and optimised for arduous off highway utility use.
  15. I've been a land rover enthusiast for 40 years, why would I do that? Out of curiosity, how long have you been involved in the industry?
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