Originally posted by Data
by the way, what do you think the "mid. range" screw really does ? to me it adjust the spray bar position, relative to the low end needle, but i don't really know what it does to the engine. the only thing i can think of is this adjustment controls how soon the low end needle leaves the spray bar completely. if i were on the right track, what would be the advantage/disadvantage of having the low end needle leaving the spary bar completely sooner/later ?
Data my friend;
http://www.rcnitro.com/rn/articles/carburetor.asp
This is a good short article on the subject with some nice cut away pics which are really helpful !