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Turbocharger

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About Turbocharger

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    Oxon

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    Intermolecular cohesive bonding, literature of the post-Marxist capitalist society, modal transport shift with increasing pressure on consumer oil prices, mud, beer and boobs.

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  1. Yes - I think they've made a new upper housing complete - I expect I'll end up making something like this (but probably not as pretty). At present I'm fitting springs with bits of wood etc to better understand which springs will suit a softtop Ninety best - and to understand why.
  2. No 🙄 I think they're too small - 1/8NPT would be 9.5mm OD across the male thread and ~0.9mm pitch, these are 7.7mm OD and 0.75mm pitch.
  3. The P38 compressor runs through a 30A fuse (so it's less than 400W then). I've just bench tested mine from a battery and saw 2.5A (30W) but that's not running against any pressure, just motoring the piston up and down. Thanks for the chassis info - it explains the strange shape of the P38 rear top cups, but I've got enough info to work up what I need. Like I said, modifying a new galv chassis isn't on the menu so it'll go back to coils if I can't make what I have fit.
  4. Paddock do (well, did - no online shop 😷) the relocation kit I got to put the shock in that forward position, it's galv but not the highest quality. It'll do for now.
  5. LSE and standard RRC have the same spring part number, I believe. The difference would probably have been made up by a slightly higher pressure by the time the levelling process had done its work. Great P38 pics Ed, thanks. At the moment I've wedged some bits of wood in the gaps to trial-fit the springs while I assess the frequencies. They're wrong, but not so wrong they wouldn't work with an adaptor piece top and bottom. Disco 2 rear airbags are still an option for one/both ends - different fittings turned up and (bad news) they're not standard M8 but (good news) not so far away so they'll screw in far enough for an O-ring to seal before it all goes horribly tight. The fitting it really needs (top of pic below) is 7.7mm OD across the male threads and 0.75mm pitch or some dark hex fraction of an inch equiv. Could be M8 fine pitch? (The bottom one is today's M8 Amazon delivery).
  6. P38 bottom and certainly the top housing isn't compatible with a Defender chassis. I've got some RRC airbags on the way when I can collect (post-Corona) for more checking. I *believe* the actual rubber bladder is the same diameter but a P38 (especially the rear) is longer. I may yet try 3D-printing some top and bottom housings to take the longer P38 bags - that would provide an opportunity to shape the piston for spring rates at different heights, and add extra volume above the spring chair for a lower rate (or a large bore for a fitting for an additional switchable volume). For now, let's see if the spring frequencies are even slightly close to coils and assess how it drives on P38 bags.
  7. I think Arduino would suffice. There's an argument for doing this with discrete components, with some non-PWM solenoids it's just an OpAmp and some relays really. It's chilly but sofa research has yielded some plug wiring diagrams, thanks to http://paulp38a.com/range-rover-p38/how-eas-works/ for example:
  8. I'll have a look at this. Arduino still has a leg up because I already own one, but it looks like I'll run out of IOs if I want a display and any accelerometer or GPS (for road speed) input, so I'll look at alternative hardware then.
  9. 1/4BSP would be 13.1mm OD though, this is 7.8mm ish. An M8 bolt screws in "a bit", same for a nut onto the fitting, which says it's something pipe-thready? https://www.thehosemaster.co.uk/bsp-pipe-threads
  10. The OE LandRover fitting is definitely 7.7ish OD. Question is why the 1/16BSP fitting I ordered has turned up and is 4.4mm?
  11. Now, what have I done wrong? Td5 Disco airbag has a screw fitting in the top, 7.7mm OD across the threads which corresponds to 1/16BSP. I ordered a push fit connector (from China 😷) but it's turned up far too small, at 4.4mm OD. Looking at the eBay picture, that's what they were selling (scaling from the 6mm push-fit pipe), so is the mistake theirs or mine?
  12. Convince me further. I like the wide community support available for the Arduino - I think it'll do what I want and I can appeal to the cleverer people when it doesn't work properly... 😁
  13. There's several plugs. For each I got the corresponding length off the P38 but that's a limited supply and the wires are old and brittle. Compressorhas a chunky plug with (I presume) power, ground and something from the pressure sensor to trigger it. The solenoid box has two plugs (red & purple) and presumably the slave ECU (yellow) which does the PWM magic. I'll be replacing this with MOSFETs controlled by the Arduino. The purple plug is internal to the box and presumably runs one of the solenoids or a sensor. The red plug would be handy to interface with: Looks like I was smart enough to get the corresponding bits off the P38 too so should be ok with these until I break either. The height sensors each have a short tail of old brittle loom so these will be more of a problem in the longer term. Any ideas for these?
  14. I'm hoping by controlling airflow between the two outer bags that it'll achieve the same aim - a kind of 'virtual' central bag. Only experience will tell if that works though. Bits turned up for the Disco 2 bags today, so that's the next session covered for fact seeking and investigation. I'm going to need electrical plugs to match the height sensors and ideally the P38 solenoid block box too - any ideas where to source these (at sensible money)? Otherwise I'll just cut them off, extend the wires and find something suitably waterproof which I can populate the pins myself.
  15. Big torque and no revs, it was a popular conversion in the 90s but they're heavy and you'll be looking at 50mph max, with 3.54 diffs. Those I knew of ran a IIA box without issues though.
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