MrDangerUS Posted November 19, 2016 Report Share Posted November 19, 2016 (edited) I'm initiating a Group Buy Initiative List. Please PM me [ [email protected] ], if you are interested It took a while, but finally, my new design has been completed! Comparing to the original Citroen DS Crown Gear and Pinion Shaft (CW+P), new design addresses several critical deficiencies of the old OE parts. It offers: - reversed direction of the spiral - to correct the OE design flaw and apply force to the correct flank of the tooth (see posts 53-60 on LT ) - larger pitch for increased tooth thickness (30% strength increase) - revised, more robust pinion gear tooth design - better final ratio of 1: 4.286 , which improves the top speed in gear (more "peppy"acceleration) - aerospace grade alloy steel (same as critical aircraft engine gears) = indestructible Here are some gear/traction calculations using new ratio: ******************************* Final Gear Ratio….: 4.286 Tire Size………....….: 275-40-18 Max Power RPM…..: 6000 Limit RPM……….....: 7100 ******************************* ********************* Gear...Ratio.. Compound ratio ********************* 1 ….2.930 …....12.558 2 ….1.940 …...…8.315 3 ….1.320 …...…5.658 4 ….0.970 …..….4.157 5 ….0.760 …..….3.257 *************************************** Gear.MPH/1000....MPH @6000…MPH @7100rpm *************************************** 1 …..........6.32…....…….38……...........…….45 2 .......…...9.54…....…….57……...........…… 68 3 …........14.02…....…….84……..........…...100 4 ........…19.09.…….....115………............136 5 ........…24.36…...…...146………............173 MPH ************************************************** ***** MPH………………………RPM (in Gears) ************************************************** ***** …….…1….….…2…....…..3…......…4……..…5-th ************************************************** ***** 05…...791….…524…..…357....….262….....205 10…...1583…..1048…....713….....524….....411 15…...2374…..1572…..1070….....786….…616 20…...3165…..2096…..1426…...1048….…821 25…...3957…..2620…..1783…...1310…...1026 30…...4748…..3144…..2139…...1572…...1232 35…...5539…..3668…..2496…...1834…...1437 40…...6331…..4192…..2852…...2096…...1642 45…...7122…..4716.….3209…...2358…...1847 50……….…….5240…..3565…...2620……2053 55……….…….5764…..3922…...2882……2258 60……….....….6288…..4278…...3144……2463 65……….…….6812…..4635…...3406……2668 70…………..........….….4991…...3668…...2874 75……………….........…5348…..3930…...3079 80…………………......…5704….4192…...3284 85……………………..…6061….4454…...3490 90……………………..…6417….4716…...3695 95………………….........6774….4978…...3900 100…………….......…....7130….5240…...4105 105………………...……………..5502…...4311 110………………..........………..5764...…4516 115……………………....……….6026..….4721 120……………………....……….6288…...4926 125……………………....……….6550…...5132 130…………………………….…6812...…5337 135……………………........…….7074…...5542 140……………………..…..................…...5747 145…………………………...............……5953 150…………………………............………6158 155…………………………............………6363 160………………………………........……6568 165………………………………........……6774 170……………………………….......….…6979 175………………………………...….…....7184 ************************************************** ***** Gear Change RPM drop (change @6000)..... RPM drop (change @7100) ************************************************** *********** 1 ->2…......…-2027 (To 3973).(19.60%)..........……-2399 (To 4701) 2 ->3…......…-1918 (To 4082).(21.28%)..........……-2269 (To 4831) 3 ->4…......…-1591 (To 4409).(27.12%).........……-1883 (To 5217) 4 ->5…......…-1299 (To 4701).(36.19%)….......……-1537 (To 5563) Edited November 19, 2016 by MrDangerUS Quote MrDangerUS Link to comment Share on other sites More sharing options...
gfallon Posted November 30, 2016 Report Share Posted November 30, 2016 in your last post you had the ratio at 3.8 but here you have it as 4.2 so was that a typo or are you trying to do the group buy for the 4.2? how much? and how many people do you need? i may be interested for the 4.2 ratio Quote Link to comment Share on other sites More sharing options...
MrDangerUS Posted December 8, 2016 Author Report Share Posted December 8, 2016 Yes, Final Gear Ratio is 4.286 Need 20 people PM me at [email protected] Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted March 26, 2017 Author Report Share Posted March 26, 2017 Group Buy Update: Design has been finalized and roll-tested. New, bespoke tooling is required for these parts. Can not start tooling without a firm commitment. Thus, I'm starting to accept deposits of $200/set Please, send to my PayPal at [email protected] (NOTE: there is no "O" in dangerUS!) We need a minimum of 15 orders. ACTION TIME! . Quote MrDangerUS Link to comment Share on other sites More sharing options...
jcslocum Posted March 27, 2017 Report Share Posted March 27, 2017 John, Do you have a guesstimate of final cost? Thanks for any info. Quote Jon - 1984 Esprit Turbo Link to comment Share on other sites More sharing options...
dsvitesse1 Posted March 29, 2017 Report Share Posted March 29, 2017 Hi John D. you say: better final ratio of 1: 4.286 , which improves the top speed in gear (more "peppy"acceleration) but original final drive is 1: 4,375. I do not see improvement in that. i can offer several diff final drive ratio beside the standard original. 1: 4.857 1: 3,888 all in stock. cheers, Harry Martens Limmen the Netherlands. advertentie harry (3).pdf 1 Quote with kind regarDS, Harry Martens www.ds-vitesse.com Link to comment Share on other sites More sharing options...
MrDangerUS Posted April 11, 2019 Author Report Share Posted April 11, 2019 Still alive and kicking! My apologies for the delay, which was caused by some unexpected personal events and difficulties in finding a suitable manufacturing source. Spiral helical gears are not easy to make and finding someone who won't charge a ridiculous fee(s) is even more difficult. If any one is still interested in this Group Buy, please send me a PM at [email protected] Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted September 29, 2019 Author Report Share Posted September 29, 2019 (edited) New parts are coming soon. 4.428 ratio improved design with stronger teeth. The ultimate best! Edited September 29, 2019 by MrDangerUS 1 Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted September 29, 2019 Author Report Share Posted September 29, 2019 ******************************* Final Gear Ratio : 4.428 Tire Size : 285-40-18 Max Power RPM : 6200 Limit RPM : 7000 ******************************* ********************* Gear Ratio Compound ********************* 1 2.920 12.930 2 1.940 8.590 3 1.320 5.845 4 0.970 4.295 5 0.760 3.365 *************************************** Gear MPH/1000 MPH @6200 MPH @7000 *************************************** 1 6.21 39 43 2 9.35 58 65 3 13.74 85 96 4 18.69 116 131 5 23.86 148 167 ******************************************************* MPH RPM (in Gears) ******************************************************* 1 2 3 4 5 ******************************************************* 5 805 535 364 267 210 10 1610 1070 728 535 419 15 2415 1605 1092 802 629 20 3220 2140 1456 1070 838 25 4026 2675 1820 1337 1048 30 4831 3209 2184 1605 1257 35 5636 3744 2548 1872 1467 40 6441 4279 2912 2140 1676 45 4814 3276 2407 1886 50 5349 3640 2675 2096 55 5884 4004 2942 2305 60 6419 4367 3209 2515 65 6954 4731 3477 2724 70 5095 3744 2934 75 5459 4012 3143 80 5823 4279 3353 85 6187 4547 3562 90 6551 4814 3772 95 6915 5082 3981 100 5349 4191 105 5617 4401 110 5884 4610 115 6151 4820 120 6419 5029 125 6686 5239 130 6954 5448 135 5658 140 5867 145 6077 150 6287 155 6496 160 6706 165 6915 170 ******************************************************* Gear Change RPM drop (change @6200) RPM drop (change @7000) ************************************************************* 1->2 -2081 (To 4119) -2349 (To 4651) 2->3 -1981 (To 4219) -2237 (To 4763) 3->4 -1644 (To 4556) -1856 (To 5144) 4->5 -1342 (To 4858) -1515 (To 5485) ************************************************************* Quote MrDangerUS Link to comment Share on other sites More sharing options...
dsvitesse1 Posted September 30, 2019 Report Share Posted September 30, 2019 Hi all, second batch of new "reversed" and for whatever it means " unbreakable " HML cwp sets is almost sold. Now for the month October I can offer special deal for set. PM for more details and price. cheers, Harry Martens www.ds-vitesse.com All gearbox parts and gearboxes ( fully rebuild) in stock for Lotus Esprit S1, S2 , S3 and Turbo version. So " previous" and C35 models. 1 Quote with kind regarDS, Harry Martens www.ds-vitesse.com Link to comment Share on other sites More sharing options...
MrDangerUS Posted September 30, 2019 Author Report Share Posted September 30, 2019 If you wait a little, you will be able to get The Ultimate Best CWP from me. All NEW geometry! 4.428 ratio improved design with stronger teeth. Quote MrDangerUS Link to comment Share on other sites More sharing options...
dsvitesse1 Posted September 30, 2019 Report Share Posted September 30, 2019 (edited) Really?? All theoretical , non proven. What if some part, 1st gear needle bushing, synchro hub ( special splines) 2nd gear needle bushing, 3rd and 4th gear train, flanged double row angular ball bearing, 5th driven gear and speedo nut, does not fit, than what? Do you have bleu print or do you use used parts to try and fit? My 16 sold reversed cwp sets are proven unbrakeable!!! Now special offer and in stock. All gearbox parts for Lotus Esprit in stock. Edited September 30, 2019 by dsvitesse1 Quote with kind regarDS, Harry Martens www.ds-vitesse.com Link to comment Share on other sites More sharing options...
Kimbers Posted October 1, 2019 Report Share Posted October 1, 2019 Calm it down guys. Just in case you haven't noticed you are currently the only ones commenting on here. Confusing the customers and criticising the opposition is not a way to get business, especially on a friendly forum Thanks. The Mod Team. 2 Quote Possibly save your life. Check out this website.http://everyman-campaign.org/ Distributor for 'Every Male' grooming products. (Discounts for any TLF members hairier than I am!) Link to comment Share on other sites More sharing options...
MrDangerUS Posted July 11, 2020 Author Report Share Posted July 11, 2020 (edited) Long awaited Super Strong Reverse Cut CWP-s for Citroen trans-axles have finally arrived. Parts were designed w/objective to maximize torque handling and Reliability. The best German spec Alloy Steel was used and a special heat treating process was used to maximize hardened layer (the "skin") on the parts. Compared to the OEM and HLM parts, they have more robust teeth with thicker roots and no stress raisers. Compare pictures 4 vs. 7 and 5 vs. 6. NEW DESIGN Pinion has 7 teeth and the Crown gear has 31. OEM 8/35 has a weaker pinion and crown gear, due to a smaller pitch and narrow(er) tooth root (base). Pitch increase results in teeth number reduction and allows for a significant thickness increase. Consequently, the 7T pinion is much stronger than OEM 8T parts. Similar principle applies to any crown gear. Reducing number of teeth from 35T to 31T creates more space along the pitch circle, permitting for cutting thicker teeth without altering overall size of the pair. ******************************* Final Gear Ratio : 4.428 Tire Size : 275-35-18 Max Power RPM: 6250 Limit RPM : 7000 ******************************* ********************* Gear ,, Ratio ,, Compound ********************* 1 ,, 2.930 ,,,,,,,,12.974 2 ,, 1.940 ,,,,,,, 8.590 3 ,, 1.320 ,,,,,,, 5.845 4 ,, 0.970,,,,,,,,,,4.295 5 ,, 0.760 ,,,,,,,, 3.365 *************************************** Gear, MPH/1000, MPH @6250,MPH @7000 *************************************** 1 ,,,,,,,, 5.87 ,,,,,,,,,,, 37 ,,,,,,,,,,,,, 41 2 ,,,,,,,, 8.86 ,,,,,,,,,,, 55 ,,,,,,,,,,,, 62 3 ,,,,,,,, 13.03 ,,,,,,,,,,, 81 ,,,,,,,,,,,, 91 4 ,,,,,,,, 17.72 ,,,,,,,,, 111 ,,,,,,,,,,,, 124 5 ,,,,,,,, 22.62 ,,,,,,,,,, 141 ,,,,,,,,,,,, 158 ******************************************************* Gear Change RPM drop (change @6250) RPM drop (change @7000) ************************************************************* 1->2 -2112 (To 4138) -2365 (To 4635) 2->3 -1997 (To 4253) -2237 (To 4763) 3->4 -1657 (To 4593) -1856 (To 5144) 4->5 -1353 (To 4897) -1515 (To 5485) Edited July 11, 2020 by MrDangerUS 1 Quote MrDangerUS Link to comment Share on other sites More sharing options...
dsvitesse1 Posted July 13, 2020 Report Share Posted July 13, 2020 so what should I say about that now? Compared to OEM and HML. "German spec alloy steel". That says nothing at all about the quality of the material. Not everything that comes from Germany is good. Once you have a certificate that describes the quality of the material, the same material from, for example, France is also perfect. And then you also have to indicate what material you use. HML uses 18CrNiMo7-6 for those sets, which is the standard for hardened sets. Measuring tooth thickness with a digital caliper ?? I don't think an engineer measures gears like that. A child can understand that if you mill fewer teeth in a certain diameter wheel, the thickness thereof increases. 21/5 gives an even thicker tooth. That does not mean anything about the strength of a tooth. The type of tooth is. Gleason, compared to Klingelnberg, has the disadvantage that Gleason has a smaller tooth foot radius and therefore succumbs faster to tooth fracture. In addition, the geometry over the tooth length at Gleason is a "circular arc". At Klingelnberg this is an "Epicycloid", which makes the Klingelnberg system less susceptible to installation errors and house deformation under load. If you are going to calculate with equivalent sets: Klingelnberg vs Gleason, Klingelnberg will be the strongest choice according to the calculation modules. About the transmission ratio. The cars with a 7-31 ratio will accelerate faster and you will lose your top speed. At the same speed, the car will also go higher in revs, which is less comfortable. All the best and good luck. cheers, Harry Martens 1 Quote with kind regarDS, Harry Martens www.ds-vitesse.com Link to comment Share on other sites More sharing options...
yeller77 Posted July 13, 2020 Report Share Posted July 13, 2020 Nice look at the Quaife diff install there, too, Harry. Surely many are running them by now. Any feedback? Thanks. Quote Link to comment Share on other sites More sharing options...
dsvitesse1 Posted July 13, 2020 Report Share Posted July 13, 2020 Hi, indeed!! Many sold. All good feedback, ask here. cheers, 1 Quote with kind regarDS, Harry Martens www.ds-vitesse.com Link to comment Share on other sites More sharing options...
MrDangerUS Posted July 15, 2020 Author Report Share Posted July 15, 2020 Lotus owners who deposited $$$ down payment year ago, can claim their parts anytime. I will hold them for you. Also, I have a limited quantity for "open sale". PM me at [email protected] Cheers John Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted February 28, 2021 Author Report Share Posted February 28, 2021 (edited) Still few available at the competitive price! PM me at [email protected] Edited February 28, 2021 by MrDangerUS Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted February 12 Author Report Share Posted February 12 Here are some pictures of the "old" OE vs. my new design/run. Add robustness! 1 Quote MrDangerUS Link to comment Share on other sites More sharing options...
MrDangerUS Posted March 27 Author Report Share Posted March 27 We have a few "left over" CWP from Group Buy Initiative Questions are asked what are the differences between old OE/HML Citroen gear pattern and the new Group Buy initiative design CWP. A: -more favorable pressure angle, reduced number of teeth, smaller module & pitch and reversed twist direction. All of the above makes teeth more robust. Also: best alloy steel and ultra-deep case hardening Designed by Gleason Works, Rochester NY, USA. Please MP at [email protected] Quote MrDangerUS Link to comment Share on other sites More sharing options...
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