[TR] Another Crazy Question: Beware, chestnut related

[terryrs at comcast.net]

Haven't researched archives, so don't feel obligated to respond.  I seem to remember hearing a couple of different recommendations on how much to set the advance on a TR3A engine.  ISTR one was 4 degrees, another lister thought 8 degrees.  Engine is at I think 4 right now, but running as if it lacks the pep I'm used to.  

Thoughts?

Terry Smith, '59 TR3A
New Hampshire