27-02-2020, 02:36 PM
I'm working from memory here John but a Reliant crankshaft has big ends displaced 7/32" from the (A7) bore centerline; this is partly compensated by 0.18" offset built into the con rod; but still leaves the small end offset 39 thou from the bore centerline. You can certainly run a touring car in this condition without issues.
Tony is right, a bit of (careful!) work with a grinder and a re-balance would sort the issue out; but I like the idea of re-thinking the lip better. Most are probably thicker than necessary (check out Jack French's piece in the 750 companion) and could stand a bit of chamfering or trimming. Having one thing in the wrong place can so easily have unforeseen knock-on effects for other things.
Tony is right, a bit of (careful!) work with a grinder and a re-balance would sort the issue out; but I like the idea of re-thinking the lip better. Most are probably thicker than necessary (check out Jack French's piece in the 750 companion) and could stand a bit of chamfering or trimming. Having one thing in the wrong place can so easily have unforeseen knock-on effects for other things.