lo-fi

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lo-fi last won the day on March 7

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  1. Snagger, your posts are usually interesting and informative, if a little blunt, but I have to admit you're being rather dogmatic here. Disks are better. Yeah, OK. Thousands of pounds better? Maybe not. Glad we can all at least agree on that one. Your size comparison doesn't really stand up, though (pun intended, let's lighten the mood). The 6 pot drums are a meager 1" larger diameter. That's a whole half inch extra turning moment. Hardly going to set wheels locking up left, right and center with there merest hint of hitting the pedal, is it? They are wider. Which on drums means more leading edge, so more braking effort for a given pedal pressure and a bit more area to distribute and dissipate heat. Great! You might not have to use both feet on that giant brake pedal... Now you can harp on about the theory as much as you like, but from someone that's actually running that setup, I can tell you it works very well. Did the move from 10" to 11" ruin the braking "feel" of the late 88? No. Frankly any of the non servo systems feel b***** awful anyway. For those of us not intent on turning a series into a defender, this is a useful option.
  2. Glad to see the project is still progressing. Thought this might be of interest... http://seriouslyseries.createaforum.com/new-board-3/2-25-petrol-turbo/15/ Ian
  3. Agreed, multi points are a pain on a daily driver. I'd build a dog guard into that... Or adapt a fume curtain around it and enjoy a cabin the heater can actually warm!
  4. My 109 with the six cylinder setup and servo also stops on a dime, so my thoughts of disk conversion also disappeared a long time ago! Still a slight pain when they get wet, of course, but I guess it's part of the charm
  5. Some really good explanation here: http://www.4crawler.com/4x4/CheapTricks/Driveline-101.shtml#CardanDefined And the article Tuko mentioned about Soren's wide angle mod: A tricky situation... Maybe it's worth calculating how much prop angle you can lose by pointing the diff nose up in line with the prop verses what disappears in length using a double cardan at the transfer end like some of the front setups (I forget which, maybe disco 2) do? The pictures suggest it might be quite effective.
  6. Thanks , it's a fun project! Apologies for the subject being off topic, but the construction is definitely relevant. Laser cut 316 stainless steel: Drawings made in OnShape.com (free online parametric CAD) Build thread here if anyone is interested. And because it's relevant, here's my (highly questionable) manual circle cutting jig for the plasma. No pilot arc on my machine, and torch height control with a screw in the bottom of the wooden torch holder, If it didn't strike, a little tap enough to bring the torch into contact with the sheet did the trick Crude, but very, very effective and had some lovely cuts out of it. The wild invention:
  7. The audi will have had an electronic control system with a solenoid in the system before the (pressure) actuator. My 1.9tdi certainly does. Don't forget that it uses the vanes for boost control, not just to improve the spool at low end with what essentially amounts to variable A/R (there is no waste gate), and I suspect a non linear relationship between boost and ideal vane position, or there would be little point in the control system. I've seen a few people claim to have done VNT conversions, but none with any technical detail beyond a scant "oh, slap on this actuator that happens to fit. Works great" that leaves you wondering if it really works that well, or even better than what was there originally.... Don't let me put you off, I think this would be a great project if done well (more than bolting it up and hoping for the best). Looks like that garret has a good shot at bolting up to the 200tdi manifold - certainly the same shape. Order up a gasket from each to check? Those audi turbos are plentiful and cheap. Controlling it to get the best out of it is the real challenge, though. Ian
  8. Try LaserMaster.co.uk I've just ordered a bunch of parts in 316 stainless for my jet engine project from them. Very helpful, the price is very reasonable (I thought so, anyway), and they're happy to do one off orders with no tooling or set up cost. Will do folding too. Love your work Simon - thanks for open sourcing this. The 3D printer looks brilliant too. Cheers Ian
  9. I think the diesel manifolds have a connection for the exhaust of the vacuum pump, which can of course be used as a takeoff for vacuum when in petrol configuration. Don't forget that the only reason you have a vacuum pump on a diesel is because there's no throttle plate, and hence no real manifold to speak of. I believe they're interchangeable with a little fettling. Fridge's suggestion of a plate that sits between the manifold and head to mount injectors in certainly has some major merits. I'll even offer to CAD one up for you! Laser or CNC isn't as expensive as you might think.. The only slight sticking point might be that stupid arrangement where the exhaust and inlet manifolds share bolts, but this can be overcome with a little thought. The plate will give you space to angle the injectors, and you can use the carb as a simple throttle butterfly with its fuel supply disconnected. The TPS will need a little thought if going this route, of course. Cheers Ian
  10. Great stuff. How well it stays put depends how you fix it, though. The stuff I've used usually comes with some stainless cable ties, but I've found myself having to order extra - particularly if doing a manifold. For odd places, annoying curves and places you can't put a cable tie, I've often resorted to using stainless dressmaking pins to fix it. Seems to work well. Interesting what you're saying about mixture change, Missingsid. Which way did it change? I'm about to do this on my carb 3.9 and have the luxury of a standalone wideband O2 sensor, so it'll be interesting to compare.
  11. Lol. Yep, 100mm might be a bit much Nice finds, Bowie! I forget the 200 manifold bolts up to older engines. Definitely a good option. Interested to see how this turns out.
  12. Nice idea.. The 2.5 diesel inlet manifold looks the best option IMHO. Make up some little Ali spigots for the injectors to go in, which will seat nicely on top of the intake runners, get your mate to weld them on, then drill and finish machine to suit. You can do the fuel rail with some extrusion with holes drilled to suit your spacing. Add a fuel pressure regulator and you've got that part nailed. The little regulator from a Toyota 4AGE would be perfect here. It bolts on, and regulates the return. Simple! For the throttle plate, try something like this: http://www.ebay.co.uk/itm/262760495140 A little Ali plate made up with holes mount that to, then welded to the inlet of the manifold will get you sorted there. You could have it running in no time
  13. Yep, sounds like a neat install. And do post some pics
  14. Jobs for my 109: Finish fitting the Eberspacher (there will be a write up). Put some insulation on the sides/floor Redo the exhaust in 3" stainless. 'Cos flames. Innit. Get to Leafers at T'Pit this year. Do a little laning in the summer. Figure out the conundrum I caused by mounting the V8 high and forwards, meaning drive to a capstan isn't possible from the crank nose. Rebuild the noisy LT85 General jobs: Overhaul my spare axles, steering box & relay, gearbox/transfer boxes (plus a million other bits) ready for finding a knackered 88 to restore. Build a trailer to house mobile workshop type stuff. Finish my jet engine (turboshaft). Purely for giggles, noise and flames. And to fit in a lawn mower maybe. If you want a natter and some encouragement for the 109, Fridge, it appears I'm just down the road from you. Was reading your ambulance thread, and realized you're local!
  15. Sounds like you've been to Mongkok, so try Golden or Wan Chai computer centers. Or, if you really want something mind blowing and have the entire day to kill, take the metro up to Shenzhen. It's a crazy place - an engineers dream... Street traders selling steel, even! You won't believe the prices, and you can get just about anything you could possibly want in the markets. Huaqiangbei electronics market might be a good place to start, but there are countless others. And if you want a laugh, go and see the Minsk. The rotting hulk of a cold war era Russian aircraft carrier turned into a "tourist attraction" in the middle of an industrial town is quite a sight! Just don't try and find the engine room unless you want to be chased back up the stairs by an angry Chinese man with an assault rifle... EDIT: sadly, they've moved this. A shame!