[Healeys] BJ8 Ignition knocking

[Niels Bengaard]

Was on holiday in UK this year with my BJ8. Have a couple of questions I
need your help me with.
I normally use super octane fuel but couldnt get it and filled up with
regular. I guess and old car with low compression should be able to use
regular, but big was my surprise when it started knocking under load at low
rpm in third and fourth. Filled up with super again and the problem
disappeared.
Checked the ignition when I returned home, it4s set at 15 deg BTDC @ 650rpm.
I recall having read somewhere thats the right number, so what is wrong.
Have altered it to 13 deg now on the little wheel on the distributor, did
that with the engine running, wow got a shock, high voltage in my arm. How
can that be, dont recall having had problems with that on other cars.

Niels
Denmark