Aldon "Amethyst" Mappable Ignition System
Ignition map library

These maps are calculated from manufacturers' published data, and are correct to the best of our knowledge.  However, they are supplied without warranty of any kind and are to be used entirely at your own risk.

To load any of these maps into your Amethyst unit, right-click on the link below and save the file to your local hard disk.  Then press "Load Library Map" in the Amethyst application, and select the file that you have just downloaded.

BMC maps, including MG and Austin-Healey

Austin Metro 998cc

Austin Metro 1,275cc

Lucas 25D4 40919 - MG Midget Mk I / Austin-Healey Sprite Mk II 1098cc

Lucas 25D4 41271 - MG Midget Mk III / Austin-Healey Sprite Mk IV 1275cc, pre-1971

Lucas 25D4 41229 - MG Midget Mk III / Austin-Healey Sprite Mk IV 1275cc, post-1971

Lucas 23D4 40819 - MG Midget Mk III / Austin-Healey Sprite Mk IV, engines 12CC and 12CE

Lucas 25D4 41198 and 41270 - MG Midget Mk III / Austin-Healey Sprite Mk IV 1275cc, engines 12CD, 12CE, 12V

Lucas 25D4 40897 (high compression) - MGB 1962-67, engines 18G, 18GA, 18GB, 18GD, 18GG

Lucas 25D4 40916 - MGB 1962-67, low-compression engines 18G, 18GA, 18GB, 18GD, 18GG

Lucas 25D4 40897 (low compression) - MGB 1968-71, engines 18GF, 18GH, 18GJ

Lucas 25D4 41155 - MGB 1968-71, high-compression engines 18GF, 18GH, 18J

Lucas 25D4 41339 - MGB, 1971, low-compression engine 18GK

Lucas 25D4 41234 - MGB high-compression engine 18V

Lucas 25D4 41288 - MGB high-compression engine 18V

Lucas 25D4 41290 - MGB low-compression engine 18V

Lucas 25D4 41391 - MGB low-compression engine 18V

Lucas 25D4 40943 - BMC Special Tune

Lucas 25D4 41032

Jaguar maps

Lucas 40617A - E-Type 3.8

Lucas 22D6 41060A - E-Type 4.2

Triumph maps

Delco 7953291 - GT6 Mk 1 1966-7

Delco 7953547 - GT6 1968-70

Delco 7953681 - Triumph GT6

Lucas 25D4 41646 - 1500, 1976

Lucas 22D6 41168 - Vitesse, 9.5:1 compression

Lucas 22D6 41182 - Vitesse, 7:1 compression

Lucas 22D6 41273 - Vitesse