[TR] Shade tree Timing

[wbeech at flash.net (wbeech at flash.net)]

Not having marked my pulley with a degree wheel when I had it apart a few
years back, I am trying to guestimate what 4 degrees BTDC looks like in
terms of inches/millimeters.
 
I am kind of thinking that if the TDC mark flashes about 1/4-3/8 before the
pointer that I am pretty close.  Has anyone ever put a ruler to this before?
 
Best,
Bill
 
Bill Beecher
'58 TR-3A TS30766L  "Tarbaby"
www.triumphowners.com/1566
"A Triumph is man's best friend, it always comes when it is called...of
course, some times it is difficult to make it go"