I have been operating on the assumption that I have a HC engine, I always
use 92 octane, and I keep it at 14 degrees. [The reason for the
disclaimer is that it's a BHM engine number ("Gold Seal" rebuilt) out of
a wreck, and I can't find a configuration reference for the number
series.] A while back I had a little pinging problem after my timing
light broke, but I got a new one, retimed it, fixed various distributor
advance failures, and since then no problems.
Larry Colen had this to say:
>What advance do people run on High Compression (9.7:1) MGB motors
>running the 92 octane fuel? I think that I might be getting a little
>pinging in warm weather, up steep hills at 12 degrees BTDC set at idle.
>That's 2 degrees retarded from the specified 14.
> Rome did not create a great empire by having meetings; they did it by
>killing all those who opposed them.
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.