BrianK 106 Posted November 16, 2020 Report Share Posted November 16, 2020 All US Elites came with Stromberg carburetors. My 1974, however, has Dellortos. From where they came, I have no idea. The stamp in the casting says "DHLA45" with no letter after it. (Were all non-turbo Lotus Dellortos "DLHA45E"?). The ID tags are 5381 & 5382 (A & P). I'm working on a bit of a sputter at low revs & it would help if I knew the starting point of the carbs. I know there were several different Lotus specs, and that those specs were different from those of other manufactures. I believe the ID tag on the float chamber says for which car/engine it was originally setup. With that - is it possible to tell if my Dellortos are a Lotus spec? If so, which spec? Quote Link to post Share on other sites
jonwat 450 Posted November 16, 2020 Report Share Posted November 16, 2020 https://www.dellorto.co.uk/ are the UK experts, they may be able to help if you drop them a line 😀 1 Quote Cheers, John W http://jonwatkins.co.uk Link to post Share on other sites
eclat22 115 Posted November 16, 2020 Report Share Posted November 16, 2020 This might help 1 Quote Link to post Share on other sites
BrianK 106 Posted November 16, 2020 Author Report Share Posted November 16, 2020 Thanks Dan - that does help to some degree. I know, now, that these aren't Lotus carbs. From your image, I was able to find a pdf of the book you've got: http://www.vintagegarage.ru/files/Fuel/Dellorto_calibration_table.pdf ... but, unfortunately, it doesn't list 5381 or 5382, so original source, and therefore original calibration is unknown. I suppose that means I'm left to pulling it apart to see what's in it. I sense another project in the making. From my research, it appears that the Lotus "Spec 5" setup is the best starting point. Not an inexpensive target if I end up having to replace everything! Quote Link to post Share on other sites
BrianK 106 Posted November 16, 2020 Author Report Share Posted November 16, 2020 (edited) For the record, I just went back to the car to double-check the ID tags and noticed that there is actually a faint "D" stamped next to the "DHLA45" casting, so these are DHLA45D's. Maybe they are Lotus after all? research continues... Edited November 16, 2020 by BrianK Quote Link to post Share on other sites
BrianK 106 Posted November 16, 2020 Author Report Share Posted November 16, 2020 HA! Found it. In the Dellorto Carburetor section of the Esprit Workshop manual, they show the tag numbers (oddly, in the Elite Workshop manual, they don't): So my carbs are from a high-compression (?) Excel, which is a "Spec 10". 1 Quote Link to post Share on other sites
BrianK 106 Posted November 17, 2020 Author Report Share Posted November 17, 2020 For the Googlers, I got a little more info from Dellorto.co.uk (thanks for the suggestion, John), so I'll add it here to spread the knowledge: 2 Quote Link to post Share on other sites
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