john.r.davies Posted December 20, 2019 Report Share Posted December 20, 2019 I found this on sale on eBay, so had a punt for it and no one else was interested! It's three pages from "Motor Trader" magazine, in 1956, and describes "the system employed on Jaguar racing cars", because so "much has been heard of petrol injection for production cars in America" It describes the outline of Lucas Pi that we know well, but illustrates it with a highly complex Metering Unit, with two rotors and shuttles, as fitted to the Jags. The author's conclusion is prophetic. "The system outlined .... is costly to manufacture... however..the cost diffferential will, in time, be narrowed." I cannot load more than one page in this post, but will append the others below. I can upload PDF copies if anyone wishes. John Quote Link to post Share on other sites
john.r.davies Posted December 20, 2019 Author Report Share Posted December 20, 2019 Page 2 Quote Link to post Share on other sites
john.r.davies Posted December 20, 2019 Author Report Share Posted December 20, 2019 Page 3 Ah! Seems I have reached a limit, either overall or just for today. I'll try again later John Quote Link to post Share on other sites
john.r.davies Posted December 21, 2019 Author Report Share Posted December 21, 2019 Page 3 You will note the seocnd article on this relic. "Auto control for overdrive" This has been a subject of extensive debate here in the past. If people would like, I'll post the rets of that article too. JOhn Quote Link to post Share on other sites
Harald Posted December 21, 2019 Report Share Posted December 21, 2019 1 hour ago, john.r.davies said: You will note the seocnd article on this relic. "Auto control for overdrive" This has been a subject of extensive debate here in the past. If people would like, I'll post the rets of that article too. Quote Quote Link to post Share on other sites
Harald Posted December 21, 2019 Report Share Posted December 21, 2019 Yes, please. Harald Quote Link to post Share on other sites
Nigel Triumph Posted December 21, 2019 Report Share Posted December 21, 2019 Fascinating history, thank you John for posting. Nigel Quote Link to post Share on other sites
john.r.davies Posted December 21, 2019 Author Report Share Posted December 21, 2019 OK, Harald. Ah - I've exceeded my daily allowance again. I'll try tomorrow, Harald. John Quote Link to post Share on other sites
stuart Posted December 21, 2019 Report Share Posted December 21, 2019 The automatic control for overdrive was fitted to early Healeys Ive had a few with it, basically when you put your foot down its like an auto boxes kickdown and it takes it out of overdrive until you ease the throttle off. Stuart. Quote Link to post Share on other sites
stuart Posted December 21, 2019 Report Share Posted December 21, 2019 The early Lucas as fitted to the LeMans Jaguars was similar to the Tecalemit Jackson system also used by Jaguar. Stuart. Quote Link to post Share on other sites
john.r.davies Posted December 21, 2019 Author Report Share Posted December 21, 2019 That metering unit is an order of magnitude more complex than 'ours' though, isn't it? Was the TJ version as complex? JOhn Quote Link to post Share on other sites
saffrontr Posted December 22, 2019 Report Share Posted December 22, 2019 To add to John's post on early injection there is a much later article in the Motor magazine of 1st October 1966 which mentions some cars equipped with injection that they had driven at Brands Hatch, these included a Rover 2000TC with Lucas Mk11 injection, a Triumph 2000 with an injection system by Associated Engineering Ltd and the Bill Bradley Group 5 Triumph 2000 saloon which had a form of Lucas MK2 injection comprising slide throttles and six very long curved inlet pipes giving 173 bhp. The AE system looked interesting and I wonder why the Lucas system was chosen over it, could it have been simplicity? I have attached the very poor scan that I have of the article for info. Derek img045.pdf Quote Link to post Share on other sites
john.r.davies Posted December 22, 2019 Author Report Share Posted December 22, 2019 Thnak you, saffrontr! TRaction had an article about the AE eletronic system - i've lost the date: Quote Link to post Share on other sites
saffrontr Posted December 23, 2019 Report Share Posted December 23, 2019 Great find John, I'd forgotten all about the article in TRaction. Quote Link to post Share on other sites
Harald Posted December 24, 2019 Report Share Posted December 24, 2019 I am still very interested in the article about the "Lucas Automatic Control System for Laycock-de Normanville Overdrive". Are you so nice John and try again. Best regards Harald Quote Link to post Share on other sites
john.r.davies Posted December 24, 2019 Author Report Share Posted December 24, 2019 How can I refuse? No joy, Harald! I don't understand the board restrictions. I was able to load more the nxt dau, before, but not now. Harald, pm me your email address - I'll send it that way. John PS After Xmas! Quote Link to post Share on other sites
Harald Posted January 3, 2020 Report Share Posted January 3, 2020 Happy New Year John, pm was sent on christmas Cheers Harald Quote Link to post Share on other sites
john.r.davies Posted January 4, 2020 Author Report Share Posted January 4, 2020 Thanks for the reminder, Harald! Been away, with grandkids etc - much more fun than boring old Triumphs! Copies on way as PM. John Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 10, 2020 Report Share Posted January 10, 2020 And here is a 4 cylinder Sprite engine with mechanical pi currently for sale in USA https://york.craigslist.org/pts/d/felton-austin-healey-sprite-sebring/7035592334.html Peter W Quote Link to post Share on other sites
stuart Posted January 10, 2020 Report Share Posted January 10, 2020 2 hours ago, BlueTR3A-5EKT said: And here is a 4 cylinder Sprite engine with mechanical pi currently for sale in USA https://york.craigslist.org/pts/d/felton-austin-healey-sprite-sebring/7035592334.html Peter W Direct link PI Sprite engine Stuart. Quote Link to post Share on other sites
roy53 Posted January 10, 2020 Report Share Posted January 10, 2020 Did they ever use these engines in anger ? Quote Link to post Share on other sites
john.r.davies Posted January 10, 2020 Author Report Share Posted January 10, 2020 (edited) http://www.sebringsprite.com/xspengines.html Of course the Lucas Pi principal could dbe used on other engines, Maserati and full race Ford capris, for instance. Maserati: http://www.maserati-alfieri.co.uk/alfieri135.htm which includes another variant of the metering unit! And Ford Zakspeed used it, Cosworth in the DFV, and Walter Hassan chose it for the Coventry Climax. It was only the rapid development of electronics that made it obsolete. John Edited January 10, 2020 by john.r.davies Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.