Not quite sure what you mean by "not getting any flavor". Are you talking smoke flavor, rub flavor? I don't think fat cap up or down is going to make any difference in what you are looking for, it's probably more a factor of what your expectations are.
Personally, I think a properly smoked brisket tastes like beef, smoke, and then a salty/spice flavor from the bark. What is your brisket missing?
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