IGNITION TIMING: Ported or Manifold Vacuum.? "Modest Centrifugal and High Vacuum Advance", and everywhere I research I find conflicting 'Expert Opinions'. Now my brain hurts...!
I've got a stock 250 with a 32/36, Langdon headers and large cap HEI. I'm running 17 degrees intial, 28 degrees BTDC max without vacuum and a total of 50 degrees with Ported Vacuum. The engine starts instantly, hot or cold, and is responsive without any detonation. I understand 50 degrees total is good, but I wonder if my 11 degrees of centrifugal should be increased and/or intial & vacuum advance be decreased as well as moved from Ported to Manifold.
I've been told don't fix it if it works, but my 'Tinker Gene' is acting-up...
