lets revisit timing

exactly!
I welded the slots to .4 to get about 20 mechanical and set my initial to 13 for a total of 34.I was getting a trace of detonation occasionally so i backed down to 11 initial and a total of 32.
The dart pulls hard and runs cool and i was just wondering if i was leaving anything on the table.
Turn the spring perch for the long looped spring so it contacts sooner. This will engage the heavy spring sooner and may slow the mid rpm advance enough to let you run 13 at idle. More likely to work if the inner end of the slot was welded than the outer, but either way its something you could try if you wanted.