Your symptoms are very common on some engines but not on an ASP 52.ASP 52 has a good carb.
I suggest you a good carb cleaning operation before playing LSN profile.I know ASP 52 engine and they are great.Most probably a dirt is partly restricting your spray bar to deliver enough fuel at WOT when inertia of fuel in tank also resisting to go.BTW did you get remote HSN to carb?If not I strongly recommend you to shift it onto the carb.(I suppose your 52 is an ASP)