TR4A distrib specs

[CarlSereda@aol.com]

Listers
I forgot to do the educational part in my previous 'vacuum advance unit' 
numbers request for TR4As email.
The 3 number codes on these Lucas vacuum advance units ie; 2-6-3 or 5-11-8, 
etc.
represent this;
a) vacuum required (mercury Hg) to start mechanism moving
b) vacuum (mercury Hg) at which maximum advance occurs
c) maximum advance in degrees

..right out of the Lucas manual..

Carl Sereda
'63 TR4 since '74