Thanks Wukkie - but the Lumenition is here well known too. The 123Ignition is much more complex - can do more. See the link at top of this page. With the "tune" Version you can create your personal ignition curves, if the engine is modified to more power (higher compression, different carbs, etc.) I drive the early Version in my TR6 since 4 years now, even in winter and it starts fine. It´s a US carb Version - compression Ratio 9,5:1. Kent camshaft 280° (like a PI) To serve this with the right ignition curve means to modify the distributer - so I took the 123Ign. distributer - took one of the 16 programmed curves and the engine has now 138 bhp. - 102 bhp at the wheel. regrads winfried