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Project M71

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Everything posted by Project M71

  1. Looking good... So the table has all all bolt hole and stud hole diameters and centres corrected to the Lotus drawing, main body inner bore increased from 125.00 to 126.00 (marked as non-critical) and all the lug ribs marked with * are increased in size for strength... The radius smoothing to reduce stress is very good and we don't need the second ABS/VSS sensor (just one with a threas tapped), or the casting turret! With reference to the earlier point on the bearing mounting tappings, I don't see a 6.0 hole, just "Bearing recess bore step" at 5.00, as on the Lotus drawing but this is the step change on the large recess dia, I presume. So what dia are the bolt holes on the Lotus drawing and is this used?
  2. How much thinner are they? I'll measure on my CAD and compare to my OEM parts Finite element analysis would be good to put some figures on stress/relative strength but billet material is a lot stronger than cast - here are the numbers for Tensile and shear strength for 6060-T6 and A350.0-T6 sand cast (what material is the OEM part cast in exac A356.0-T6 Sand Cast Tensile Strength, Yield >= 165 MPa @Strain 0.200 % >= 24000 psi @Strain 0.200 % Tensile Strength, Ultimate >= 234 MPa >= 34000 psi Shear Strength 143 MPa 20700 psi 6061-T6 Tensile Strength, Yield 276 MPa 40000 psi Tensile Strength, Ultimate 310 MPa 45000 psi Shear Strength 207 MPa 30000 psi
  3. The billet parts will of course be stronger but this comment on social media is very relevant: Jonathan Edwards I'd look at the mode of failure and re-inforce that area (probably the lower link legs, that's where 2 of mine cracked). If you billet machine this you're paying for the part and the swarf, and the machine time so it makes sense to reduce as much as possible, plus a direct copy of a sand cast item isn't always ideal when you use different manufacturing methods.
  4. Chis/Mike, Yes indeed, this is very good to see I am so glad to see this project come back to life - it was sorely needed and it's looking like the results will be excellent 😄
  5. For reference, here are quotes I had for pricing for 5 units for the ver 1.3 file and it's mirror, without tappings, in 6061, from xometry inbound1886336722.pdfinbound304828966.pdf
  6. I've put the latest Novorota files here for safekeeping - and there's a link to the earlier Novorota files and all my CAD work http://www.projectm71.com/RearUprights.html?fbclid=IwAR2T-TiNfsgmAbDwvV4KGIeZ-a83C3X8wZBInqhSJe0ttG61WwIRR4O4S5A
  7. Ignas has posted the ver 1.4 CAD files now and an excellent technical drawing, which some of the suppliers were asking for - these have the details on the tappings for the hub bolts. I have a look in CAD later and get a new quote
  8. Just commented this on social media but I thought I would add here... Here is a Play List for those interested in the process to part machining, once CAD is complete... CAM (Computer Aided Manufacturing), tool selection & tool paths, NC/G Code (on which the Millling machines/lathes directly operate) and then the actual machining https://youtube.com/playlist?list=PL2UIEWwqJXrORlKXRQjQHY4ESaQNZdQi3 This process is all part of the setup costs that the estimates for the uprights include - and why costs reduce with greater part numbers, as the CAM only has to be done once
  9. I'll let Mike comment/confirm, as I only concentrate on the Turbo Esprit and V8, but I don't see any changes in the model changes after the Commonisation of 'Eagle Chassis': May '89 Here: http://www.projectm71.com/changes.htm The ABS sensor holes are there in the CAD model and the webbing is as on the V8
  10. Yes they should made in 6061-T6 - I'll ask for requote when Ignas posts the files but I guess people may have their favourite machining companies?
  11. OK All.. I've been in conversation with Ignas and he is checking the revisions for the points below now and he is going to post the verified files for both sides on the Forum at the weekend 1) larger lower mounting diameter 2) ABS sensor and tapping The ABS sensor tapping may need to be added but he will do that I'm not sure if my efforts in learning CAD were warranted/worthwhile but if we get files for both handed parts, with the corrections, all ready for CNC and our group buy works out, I guess in some way they were.
  12. 1. Mike Sekinger 2. Greg Dollimore 3. Project M71 4. Harris David (facebook) - David H above maybe? 5. Denis Lavigne (facebook) - "depending on price" So, I guess were pretty much there if everyone wants a left and right hand pair (why would you not?) On to the (CAD)CAM work on the other handed unit and checking of dimensions...
  13. The first of the second round of quotes look much more promising (some of the original quotes were over £2,500 for a single unit) - the quote below for 10 off (5 pairs) is now at a single unit price of 607.45 Euros ($670.55, £511.40) That sounds very, very good, for billet units that are many times stronger than the originals I am now obtaining CAD software to produce the other handed version and I will get final quotes for muliples of pairs, left and right uprights *** We then need at least 5 names of those intersted in a pair - I think we are near that with those here and others on social media - I will compile a full list ***
  14. The second round of quotes are being prepared in order to bring costs down: Please note these responses sent to all those quoting: 1. When do you need an offer for? When must the parts arrive(Deadline)? ** No specific deadline but sensible delivery time 2. Will this be a one off order or long term? ( for our tooling up purposes ) ** This would be an on-going order with a long lifetime, its a classic car part which the manufacturer no longer supplies and there are virtually no second hand parts available - there is a large car club community that are looking for a replacement 3. Please could you supply a current price per unit that we must beat? ** Sub £800 per unit - they would be ordered as a left and right hand pair, so sub £1600 total 4. Anything extra you’d like to highlight or I should know? ** Your company can be advertised on the car club forum and other websites without charge, if you can match the requirements
  15. I now have the CAD file from Novorota, the company that was developing a CNC billet replacement for the Esprit V8 rear uprights... https://fb.watch/b7_C8hGMNY/ Project M71 will use a pair of these but I'm also canvassing Interest in group buy - I will be contacting engineering companies for price estimates So let me know if you are interested Many Thanks to Ignas for providing the CAD data! 👍 His original thread:
  16. Speaking to Ignas, formerly of Novorota, for some time about getting Rear Uprights (hubs here) produced for Project M71 As known, the business is no longer in existence and they only produced one pair for a test installation - he is very busy on a new project with tight deadlines, working all hours of the day, so things are moving slowly but in his words he is "thinking about giving you and everyone else the files for free, they are CNC ready, and any modern shop wouldn't need anything else to make a pair" Let's hope this happens... and thinking ahead it would be an opportunity for the usual combining for a "club order", as I'm sure a machine shop would give favorable prices for a larger order
  17. Speaking to Ignas, formerly of Novorota, for some time about getting Rear Uprights (hubs here) produced for Project M71 As known, the business is no longer in existence and they only produced one pair for a test installation - he is very busy on a new project with tight deadlines, working all hours of the day, so things are moving slowly but in his words he is "thinking about giving you and everyone else the files for free, they are CNC ready, and any modern shop wouldn't need anything else to make a pair" Let's hope this happens... and thinking ahead it would be an opportunity for the usual combining for a "club order", as I'm sure a machine shop would give favorable prices for a larger order
  18. Speaking to Ignas, formerly of Novorota, for some time about getting Rear Uprights (hubs here) produced for Project M71 As known, the business is no longer in existence and they only produced one pair for a test installation - he is very busy on a new project with tight deadlines, working all hours of the day, so things are moving slowly but in his words he is "thinking about giving you and everyone else the files for free, they are CNC ready, and any modern shop wouldn't need anything else to make a pair" Let's hope this happens... and thinking ahead it would be an opportunity for the usual combining for a "club order", as I'm sure a machine shop would give favorable prices for a larger order
  19. Speaking to Ignas, formerly of Novorota, for some time about getting Rear Uprights (hubs here) produced for Project M71 As known, the business is no longer in existence and they only produced one pair for a test installation - he is very busy on a new project with tight deadlines, working all hours of the day, so things are moving slowly but in his words he is "thinking about giving you and everyone else the files for free, they are CNC ready, and any modern shop wouldn't need anything else to make a pair" Let's hope this happens... and thinking ahead it would be an opportunity for the usual combining for a "club order", as I'm sure a machine shop would give favorable prices for a larger order
  20. Is this the most JPS Special Edition Esprits that have been seen together? Ten of them... youtube.com/watch?v=MQV7xHNj7EI&t=265s
  21. The key point in the cam fitting procedure appears to be the torquing of the camshaft pulley bolts to only 5 ft lbs with the clamping caps, belts and tensioners in place and then rotating the crank and the belts "dragging" the cam pulleys in this state (so the cam pulleys rotate with the light torque of the bolts to the cams held stationery by the clamping caps). This would keep positive tension on the belts and the cam pulleys, until ther bolts are torqued to 74 ft lbs, with the timing properly established at 10 deg BTDC: Marked in red:
  22. The MT-501 firmware does allow password protection of the two tables but again this wouldnt apply to a blank chip
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