I’ve been following this correspondence with interest as I’ve recently bought a Birmingham Scott that has been equipped with drippers only, the Pilgrim Pump & Distributor having been removed to enable a twin contact breaker ignition system to be fitted. There are no one way valves either but (I assume) it has the original glands fitted with timed oil holes that allow crankcase suction to draw oil into the mains. These mods appear to have been done years ago and the engine seems fine. I don’t think the previous owner even used petroil and just set the drippers according to the exhaust smoke. I intend to leave it as it is for the time being but will definitely be using petroil. Time will tell if my assumptions are correct!
Roy Fisher
