Project M71 Posted February 12, 2022 Report Share Posted February 12, 2022 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: Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted February 13, 2022 Report Share Posted February 13, 2022 1. Mike Sekinger Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
Greg D Posted February 24, 2022 Report Share Posted February 24, 2022 2. Greg Dollimore Quote Link to comment Share on other sites More sharing options...
David H Posted March 28, 2022 Report Share Posted March 28, 2022 Hi, are you able to share the cad file and I'll see if I can get some quotes for the group too. Thanks David Quote Link to comment Share on other sites More sharing options...
Project M71 Posted March 30, 2022 Author Report Share Posted March 30, 2022 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 Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 3, 2022 Author Report Share Posted April 3, 2022 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 *** Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted April 4, 2022 Report Share Posted April 4, 2022 1. Mike Sekinger 2. Greg Dollimore 3. Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
Project M71 Posted April 4, 2022 Author Report Share Posted April 4, 2022 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... Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted April 4, 2022 Report Share Posted April 4, 2022 @cweeden did you ever get around to fitting the prototype uprights supplied by Novorota? Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
fjmuurling Posted April 4, 2022 Report Share Posted April 4, 2022 Just curious, (maybe @mike_sekinger knows) but are these dimensionwise the same as for a 1990 SE. (I know there are some extra holes for the ABS sensors and the webbing is a bit "wider" to accomodate the hole for the handbrake cable. More numbers means price reduction? Where is the sweet spot? Quote Esprit Freak Link to comment Share on other sites More sharing options...
Greg D Posted April 5, 2022 Report Share Posted April 5, 2022 Yes, Left and Right for me. And just confirming my interest. Let me know where to from here! Quote Link to comment Share on other sites More sharing options...
cweeden Posted April 5, 2022 Report Share Posted April 5, 2022 14 hours ago, mike_sekinger said: @cweeden did you ever get around to fitting the prototype uprights supplied by Novorota? I have been plagued by delays (not related to the hub carriers) so they are not fitted at the moment but I have trial fitted them, which led to a couple of discoveries. We'd missed the ABS sensor hole and fixing bolt somehow, so I have had that machined. The other aspect that wasn't quite right was the diameter of the hole for the sliding bush in the lower mount, it has been machined a little larger than stock and so I've had to resort to using some shim steel to take up the slack. I'm pretty sure Ignas has corrected the model for both of these since we discovered them and we have the correct dimensions for everything now since Sacha shared the original drawings so easy enough to check. Unfortunately Ignas lost patience with me and we've had a falling out which is a shame but I would be very confident his model is good and as long as the machine shop does a proper job these will be very good. I can't remember the grade of alloy we went for though, I think it was 6061 but here is the advice from @CHANGES 6061 is where most start for this sort of application, preferably in T6 format .. (heat tempered) for maximum strength (6061-T6) You can also get it in a stress relieved form which has a suffix of 51 (6061-T651). 14 hours ago, fjmuurling said: Just curious, (maybe @mike_sekinger knows) but are these dimensionwise the same as for a 1990 SE. (I know there are some extra holes for the ABS sensors and the webbing is a bit "wider" to accomodate the hole for the handbrake cable. More numbers means price reduction? Where is the sweet spot? I would imagine the sweet spot has been hit more or less, that pricing is very good indeed. @Project M71 are you planning on any surface treatment to prevent corrosion? (just curious), also where are you based? Quote Link to comment Share on other sites More sharing options...
sailorbob Posted April 5, 2022 Report Share Posted April 5, 2022 Will the uprights be 6061-T6? If they are just the annealed 6061 grade then they may be quite a bit less strong than the OE uprights if they are cast in something like LM25TF alloy. Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted April 8, 2022 Report Share Posted April 8, 2022 If the CAD model verification is done, it would be reall good to be able to move forward to fabrication. Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
Project M71 Posted April 8, 2022 Author Report Share Posted April 8, 2022 (edited) 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. Edited April 8, 2022 by Project M71 Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 8, 2022 Author Report Share Posted April 8, 2022 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? Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 8, 2022 Author Report Share Posted April 8, 2022 On 05/04/2022 at 08:34, cweeden said: I have been plagued by delays (not related to the hub carriers) so they are not fitted at the moment but I have trial fitted them, which led to a couple of discoveries. We'd missed the ABS sensor hole and fixing bolt somehow, so I have had that machined. The other aspect that wasn't quite right was the diameter of the hole for the sliding bush in the lower mount, it has been machined a little larger than stock and so I've had to resort to using some shim steel to take up the slack. I'm pretty sure Ignas has corrected the model for both of these since we discovered them and we have the correct dimensions for everything now since Sacha shared the original drawings so easy enough to check. Unfortunately Ignas lost patience with me and we've had a falling out which is a shame but I would be very confident his model is good and as long as the machine shop does a proper job these will be very good. I can't remember the grade of alloy we went for though, I think it was 6061 but here is the advice from @CHANGES 6061 is where most start for this sort of application, preferably in T6 format .. (heat tempered) for maximum strength (6061-T6) You can also get it in a stress relieved form which has a suffix of 51 (6061-T651). I would imagine the sweet spot has been hit more or less, that pricing is very good indeed. @Project M71 are you planning on any surface treatment to prevent corrosion? (just curious), also where are you based? Based in Bucks, near West London Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 8, 2022 Author Report Share Posted April 8, 2022 On 04/04/2022 at 18:16, fjmuurling said: Just curious, (maybe @mike_sekinger knows) but are these dimensionwise the same as for a 1990 SE. (I know there are some extra holes for the ABS sensors and the webbing is a bit "wider" to accomodate the hole for the handbrake cable. More numbers means price reduction? Where is the sweet spot? 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 Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 8, 2022 Author Report Share Posted April 8, 2022 (edited) 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 Edited April 8, 2022 by Project M71 Quote Link to comment Share on other sites More sharing options...
Project M71 Posted April 13, 2022 Author Report Share Posted April 13, 2022 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 Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted April 13, 2022 Report Share Posted April 13, 2022 1. Mike Sekinger (x2 sets) one for Andrä Schrörs 2. Greg Dollimore 3. Project M71 4. Harris David (facebook) - David H above maybe? 5. Denis Lavigne (facebook) - "depending on price" Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
Project M71 Posted April 13, 2022 Author Report Share Posted April 13, 2022 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 Quote Link to comment Share on other sites More sharing options...
sailorbob Posted April 13, 2022 Report Share Posted April 13, 2022 Thanks for posting the files. One item stands out, the tap drill size for the bearing mounting M7 x 1.0 mm thread is shown as 6.1 mm but for aluminium the general rule is to subtract the pitch from the diameter of the thread, i.e. it should be a 6.0 mm hole. 1 Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted April 13, 2022 Report Share Posted April 13, 2022 Thanks Derek. Now that we have people looking at the CAD files, there are a number of things popping-up that are either not correct/or optimal. It is likely that the model will need a clean-up and correction to address those things prior to any manufacturing. Some work is starting along those lines, so updates to follow. 1 Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
sailorbob Posted April 13, 2022 Report Share Posted April 13, 2022 Yes, when comparing the CAD file to a hub carrier there are unfortunately some concerning discrepancies. Rather than clutter this thread with items spotted is there an alternative way to compile and coordinate this? Quote Link to comment Share on other sites More sharing options...
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