30-08-2021, 04:28 PM
I built my Ulsteroid from all sorts of bits many of which were completely worn or very corroded but I did rebuild the early coil engine with new bearings, a re-bore. Reground crank with new white metal big ends etc so I’m fairly sure it’s mechanically OK.
I fitted a 1 ¼” SU Carb from a Morris Minor (I think!) and more recently fed this with a 6-volt SU fuel pump. The SU has a new jet and the recommended needle. (Not totally sure which one but I think it may be an AN).
Anyway, the issue I have is that the engine has always run quite roughly and at tickover the exhaust not isn’t at all even, it actually seems to change in a repetitive cyclic way every few seconds.
I’m not sure if this is to be expected as the engine has oversized inlet valves, flattened cam followers and a late Ruby style head or whether there is something I should do about it.
The only questionable item is the distributor which is a DK4A type and does have some small amount of radial play in the shaft and also a very worn drive gear. I also have no idea how worn the auto-advance mechanism might be.
Any comments / recommendations,
John.
I fitted a 1 ¼” SU Carb from a Morris Minor (I think!) and more recently fed this with a 6-volt SU fuel pump. The SU has a new jet and the recommended needle. (Not totally sure which one but I think it may be an AN).
Anyway, the issue I have is that the engine has always run quite roughly and at tickover the exhaust not isn’t at all even, it actually seems to change in a repetitive cyclic way every few seconds.
I’m not sure if this is to be expected as the engine has oversized inlet valves, flattened cam followers and a late Ruby style head or whether there is something I should do about it.
The only questionable item is the distributor which is a DK4A type and does have some small amount of radial play in the shaft and also a very worn drive gear. I also have no idea how worn the auto-advance mechanism might be.
Any comments / recommendations,
John.