19-06-2018, 09:35 PM
(19-06-2018, 08:26 PM)Ian Williams Wrote: I would suggest that some of that information maybe misleading, dependant on engine spec we want to be at full advance somewhat higher than 1000 RPM, this figure will be distributor speed. I also disagree with Jim, sorry Jim, that the light spring should be fully extended at idle, but agree its influence is greatest at very low engine speed. My experience is that if you can eliminate play in the DK4 mechanism, which requires new parts or an ability to remake and or bush the old ones they work well, the most difficult problem to rectify was wear of the pins, fortunately new parts are now available, re-bushing the quadrant and body is also often necessary.
Must admit I was thinking much the same on the walk home tonight Ian. If you are going to set max advance at 1000 (engine) rpm - scarcely much above idle - then why bother with auto advance at all.