3 turns, 5 turns out? This is all relative to your glow plug, fuel type and nitro percentage, pipe, Head Clearance, MOTOR, it's carb, fuel line, fuel filters, diffs etc.

Lean the LSN and HSN in 1/8th increments until you get your motor running how you want it. If its one of the Higher end Italian motors 220-300 degrees is just fine for it.