Lotusfab Posted November 14, 2014 Report Share Posted November 14, 2014 Does anyone please have a picture of the SU pump in situ thanks. 1 Quote Link to comment Share on other sites More sharing options...
mdw Posted November 16, 2014 Report Share Posted November 16, 2014 This may or may not be of any use to you but as nobody else has posted this was the Su pump on my stevens 88 before it all got rebuilt. Might be similar, might not I have no idea sorry. Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 16, 2014 Author Report Share Posted November 16, 2014 Thanks for the effort,, similarities got this, think I know how to fit just wanted to confirm. Quote Link to comment Share on other sites More sharing options...
Paul Coleman Posted November 16, 2014 Report Share Posted November 16, 2014 There should be a round bracket on the inside of the bodywork on the driver's side. Paul. Quote Lotus Esprit [meaning] a 1:1 scale Airfix kit with a propensity to catch fire Link to comment Share on other sites More sharing options...
Lotusfab Posted November 17, 2014 Author Report Share Posted November 17, 2014 Only got a metal plate. Plan to bolt the pump on directly using BSF bolts. The pump has rubber sealing rings as shown in the picture, planning to replace. The connectors are straight and not banjo. Has anyone used straight connectors with the rubber seals and if so do the joints leak?[doesnt seal satisfactory to me!attachment=29825:image.jpg] The plate is at the back of picture. My car has the S2 fuel pump arrangement fitted in bulkhead on passenger side. Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 19, 2014 Author Report Share Posted November 19, 2014 Anyone with an S2 got a picture of the unions that connect to the SU pump. Have decided the ones in the picture are wrong and cannot work as they don't seal correctly? Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 21, 2014 Author Report Share Posted November 21, 2014 Have solved this problem. Will post the details here so anyone who has this problem will have the solution.the unions on the pump shown in the are incorrect. They will never seal correctly as there needs to be a flat surface to seal with the rubber seal on the SU pump side. The correct union is available from several suppliers, I used Burlen, they are on the internet. Quote Link to comment Share on other sites More sharing options...
Mesprit87 Posted November 22, 2014 Report Share Posted November 22, 2014 Don't even have an SU pump on mine but it does remind me of the one I use to have on a 1951 Jag MkV. Plenty of pleasure there, changing a diaphragm... That fitting really seems like the proper & easy fix. Gotta love this Forum! Quote Something I learned about cars or planes, it all works until it doesn't anymore...sometime there is no way around it! Link to comment Share on other sites More sharing options...
Lotusfab Posted November 22, 2014 Author Report Share Posted November 22, 2014 Now need to change the male diameter back to that need to accept the Esprit fuel pipes. A suitable adapter piece is available from S and J sportscars. Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 24, 2014 Author Report Share Posted November 24, 2014 Well one step forward two steps back. Even though these are the correct union for the pump apparently Lotus did use the original unions, I had in the picture, sealed with thread sealant. For the engineers amongst us a very poor solution. If I has a lathe I would just make my own! Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 24, 2014 Author Report Share Posted November 24, 2014 Also I was incorrect the adapter sold by S and J does not fit! Definitely need to invest in some engineering equipment and make my own parts! Quote Link to comment Share on other sites More sharing options...
Mesprit87 Posted November 25, 2014 Report Share Posted November 25, 2014 Can't you just find a B-nut that fits and re-flare, after all the pressure in there is not that high? Quote Something I learned about cars or planes, it all works until it doesn't anymore...sometime there is no way around it! Link to comment Share on other sites More sharing options...
Lotusfab Posted November 26, 2014 Author Report Share Posted November 26, 2014 The internal diameter of the new unions is smaller than that of the fuel lines, so they will not fit directly. A female/ male adaptor is needed to increase the internal diameter, Still amazed Lotus didn't make a part Identical to the above with the correct diameter for the fuel line, or maybe they did, but the only fuel lines available now have a larger diameter? Will need someone with an original S1 to give us the answer? Quote Link to comment Share on other sites More sharing options...
Freemason Posted November 26, 2014 Report Share Posted November 26, 2014 Stupid question: is the 'SU' fuel pump some kind of upgrade for the S1/S2? Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 26, 2014 Author Report Share Posted November 26, 2014 It's the original pump, as far as I'm aware. Quote Link to comment Share on other sites More sharing options...
molemot Posted November 26, 2014 Report Share Posted November 26, 2014 OInce again I recommend my favourite automotive plumbing suppliers... http://www.thinkauto.com/ They're in Isleworth...you're in Surrey....drive over with your bits and their parts counter should sort you out. Quote Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein Link to comment Share on other sites More sharing options...
910Esprit Posted November 26, 2014 Report Share Posted November 26, 2014 Can't really see whats going on, but looks as though suitable dowty washers may be the answer Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted November 26, 2014 Author Report Share Posted November 26, 2014 Thanks John, that's not far might pop in and see what they have. Quote Link to comment Share on other sites More sharing options...
molemot Posted November 27, 2014 Report Share Posted November 27, 2014 I used to be in Kew and they were just down the road....made up a full set of fuel hoses while I waited, and seem to be able to supply any plumbing needs for vehicles; very helpful, too!! Quote Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein Link to comment Share on other sites More sharing options...
Freemason Posted March 6, 2015 Report Share Posted March 6, 2015 Bit late to the party, but here's a pic of my fuel pump just after removal from my S2: Quote Link to comment Share on other sites More sharing options...
Paul Coleman Posted March 6, 2015 Report Share Posted March 6, 2015 (edited) The original S1 had two different fittings on the fuel pump. The inlet is a regular banjo bolt (which comes out the pump at a right angle A079L4009F) and the outlet is a straight adapter A079L6007F which fits onto the 'Y' shape fuel lines SJ907E0067. Paul. Edited March 6, 2015 by Paul Coleman Quote Lotus Esprit [meaning] a 1:1 scale Airfix kit with a propensity to catch fire Link to comment Share on other sites More sharing options...
Lotusfab Posted March 7, 2015 Author Report Share Posted March 7, 2015 Went down to think auto. Got some 10 mm aluminium fuel pipe and a AN elbow connector. Thanks for the recommendation. I'm getting closer to finishing this. They did not have the connector BSP to fit the SU pump. So I ordered one off ebay. It fits the SU pump but not the AN fiting. I ordered the wrong AN size. Didn't realise the AN sizing refers to the Outer diameter of the pipe it fits and not the thread size with BSP fittings. I will get it right eventually, once I have collected all the AN sizes!After wasting a lot of cash on fittings that don't work! When I get the solution I will post it all here so no one else has this hassle. Quote Link to comment Share on other sites More sharing options...
Arnaud Couturon Posted March 9, 2015 Report Share Posted March 9, 2015 A bite late my old Lucas on my S2.2. I change it for a modern one Sorry I cant add the picture Quote Link to comment Share on other sites More sharing options...
Lotusfab Posted March 10, 2015 Author Report Share Posted March 10, 2015 Here's my solution. Remake the fuel pipe out of plastic coated 10 mm aluminium so that it goes over bulkhead and fits directly into an AN 6 elbow. Use a proper pipe bender so pipe does not collaspe. Then use an AN 6 to 3/8 BSP adapter to go directly into SU pump. Use Locktite sealant on thread. Wish someone told me this at the start, anyway hope it helps someone in the future . Here's the pictures!similar adapter on left to the one I used. Picture of pump finished just have to fit new clips. Quote Link to comment Share on other sites More sharing options...
Fridge Posted September 19, 2017 Report Share Posted September 19, 2017 Hi @Lotusfab I think I can guess, but where is this SU fuel pump and bracket mounted? I asked @Freemason as he has the same set-up I believe but he wasn't sure. My pump and bracket were not fitted to my S1 when I bought it. It looks like the silver (highlighted) pipework on the LHS of the photo is going to the carbs, through the driver's side of the body. Which would make the pump located between the driver's side tank and rear of the car. In the body shell channel? I'm surprised there is enough height in that space, to fit this assembly below the luggage area floor boarding. I am very unclear as to what and where the other pipes lead, particularly the one off the 'T' piece highlighted on the LHS. I assume the pipe (red connector) is from the two tanks? My fuel line is the SJ supplied B085L4082F Quote Link to comment Share on other sites More sharing options...
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