Does anyone know the typical stock total advance in degrees used on a 235-261? I do know a stock GMC 302 distributor has about 26-28 crankshaft degrees of mechanical advance plus the 5 initial.
It's my understanding that drag racing engines often run extreme ignition advance through through the lower gears.
I used to race British Triumph 650 motorcycles.Total advance was around 42 degrees on a 20 cubic inch true hemi head cylinder turning 7500 rpm.
Most all wedge head pushrod V-8's run 34-40 degrees total advance for street engines.Newer SBC quick burn head designs about 30-32 degrees.
I'm thinking flatheads use less advance?
