Quote:
Originally Posted by Lawrie
One thing that may make it sooth is 4deg at idle and full advance at 19 deg ,all in by 2950 rpm. using the 40 B advance curve.
Lawrie
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You are probably correct that the earlier distributor makes for a smoother running engine. I have found that the 8 lobed cam on the later helmet distributors often has quite a bit of runout. I found this the hard way after I rebuilt a distributor for my 37, the engine had a dead miss. I finally figured out that that cam had been machined off center so bad that on one cylinder the points opened so late the cylinder didn't fire. I built up a distributor with the later body but all the earlier internals (I sanded down the rotor to fit) and the motor runs great.