Timing calculators are worthless. Here is what they do…

Person A says to Person B, “tell me to set timing at 1600rpms and 45mm3/stroke to 7 degrees before top dead center.”

Person B says to Person A, “ok, set timing at 1600rpms and 45mm3/stroke to 7 degrees before top dead center…”

Person A says “ok, I will set timing at 1600rpm and 45mm3/stroke to 7 degrees before top dead center”