New car, new member - a few questions

[Wiggles (Paul Wigton)]

The earlier dizzy has a better advance curve, for power.

Distributor advance curve with SU versus Stromberg carbs

Dennis, You are probably in a similar situation to me as far as the distributor is concerned (though I still have the Strombergs). I have the 41207 model distributor which has no vacuum advance unit. Later Series 2s had another model which incorporated a vacuum retard unit in a further attempt to reduce emissions. Since the carburetion and ignition timing of the engine are linked, any change to the carburetion is likely to require some changes to the ignition timing to remain optimal. A lot has…