Carb tuning, larger accelerator pump nozzle?
@mderoy340
I have had the initial as high as 30 degrees (I didn't reset the total). It did like it and would just buck back a tiny bit when starting hot.
Yea. That's the only thing I disagree on if you intend to use vacuum advance but its good you experimented with that approach.
What an engine likes in neutral is not the same as what it likes with a high load.
And when the clutch is let out, that load is very high compared to the max power the engine can produce at these rpms.
I would work in small steps from where you are now.
I would go for 18* at 750 - 850 rpm and make sure there is enough tension on the spring to be sure its really the initial.
With a relatively rich mixure there shouldn't be a need to light it off early. I'm running 17* initial with a 230 @ 50 cam right now. heads, compresion, intake valve closuing point all have some effect so no one answer.
Don't worry about where the idle mix screws end up. That's what they are for. As long as they have effect. If you turn them and there is no response, then they are out of working range. Four corner idle is going to be more difficult. Try not to have to mess with the secondary IFR and IAB as that will impact how well the secondary opening responds.