Lucas distributor advance curves. Click for 20-page 159-KB pdf file
The first curve is vacuum advance with engine … It contains more information on the motor- and distributor numbers, static timing and the advance-curves (often found on the last page), the specifications of the 123ignition and a step-by-step description of the installation procedure. First things first, identify if its a real Lucas or not - look at the … By changing the spring combination on a two-stage advance curve distributor, one can achieve quicker advance to 1500 RPM, slower advance change at mid RPM, and full advance from about 3000 RPM. Centrifugal advance is obtained by turning the upper part of the distributor shaft, carrying the points cam, anti-clockwise relative to the position of the crankshaft to open the points sooner and hence advance … This document will look at tuning the advance curve of Lucas distributors, 23D/25D and 43D/45D types in particular, but the principles and approaches used apply to any distributor with mechanical advance. Studying this illustration suggest that a great distributor can be made without any sophisticated, digitalized or twist … By changing the spring combination on a two-stage advance curve distributor, one can achieve quicker advance to 1500 RPM, slower advance change at mid RPM, and full advance from about 3000 RPM. The T type distributors used two different spring sets to control the automatic advance. Years of … This is the original distributor using 60+ year old springs but with new bearings and play removed from the advance mechanism itself. Alternative advance curves can be selected to suit your engine's state of tune making them ideal for both stock and modified … A good example of that difference is the Lucas 40199 distributor which was used both in the XK 120 and 140: the XK 120 used the 40199A to D with type indication DVXH6A and the XK 140 had the 40199E … Does anybody have the specifications for checking mechanical advance on a Ser II distributor - that’s the one for US and Canada - the one without the vacuum canister. g. Click for 20-page 159-KB pdf file. 222 (SECOND EDITION) 40293A DVXH6A: Run up to 2000rpm: 13 to 15 degrees advance. Tuning the Lucas Distributor What is covered: This document will look at tuning the advance curve of Lucas distributors, 23D/25D and 43D/45D types in particular, but the principles and … A Compilation of Lucas and Delco Remy distributor specifications as used on the MG and Triumph automobiles, listing advance curves and vacuum curves where available. In the healey … 23D4 Distributor assembly # Reproduction Lucas 23D Distributor The original performance distributor as fitted to most British high performance and racing cars from the 1950s and 1960s. The unit offers 16 different advance-curves, that can be selected via a little switch. All Lucas distributors will be set the original … In theory, the ideal distributor is the one designed for the engine to which it is fitted. Jack- If you want some more general info on understanding advance mechanisms and different curves (pinking curve for instance) and on, check this lively Lucas publication. I am going through my distributor and want to know about the proper springs and advance curve. I … Improve the performance of your classic car with this highly reliable electronic ignition distributor. For the Jaguar Mark V 3 1/2 litre engine with Lucas Distributor 40149E below are some data for static setting and advance curves with a vacuum advance. From my car, here is a curve set taken with the car stationary in the garage and … We supply a whole range of new, outright Lucas distributors, below is just a small selection. In the most general terms - my interpretation of the data indicates: Does anyone have distributor curves to share? Looking up specifications for the 3 1/2 Mark V engine gives the shop manual numbers, but I cannot find any curve data. The way to do this is to replace the advance springs to lighter ones, and replace the bushing, if your distributor has one. This distributor has been faithfully recreated whilst being subtly upgraded for improved performance and reliability. I have seen some discussions of advance curves in the past, but unfortunately the search function isn’t working for me this morning. Barry built the distributor in my BJ8 (actually - he has built me a few - we've tried several advance curves and done a lot of testing!) … The Lucas 25D6 Distributor is a vacuum advance distributor used in 6 cylinder vehicles from prestigious British brands including Aston Martin, Jaguar, Triumph, Marcos, MG and Rover. Am I misunderstanding something here ? According to the XK140SE graph, if you add the 10 degrees to the curves, you get a total of 48 degrees, as it says static set at 10 degrees BTDC !? However, studying advance curve data in the reference table reveals that all ignition advance curves have the same basic pattern, dictated by physics of the internal combustion engine: increasing … The Swiftune CSI Distributor has our own bespoke curves developed over 45+ years of A-Series engine tuning that cannot be purchased anywhere else.