At about 180 bpm how can you divide it accurately into two, playing a swing rhythm, I try tapping my foot to help but im not John Bonham, my foot cant keep it up.
are you trying to play swing? or are you saying it just sorta happens by accident when you go that fast?
If the fastest you are going is 8ths at 180, then do 1a&e - 2a&e - ect(16ths) at 90 BPM. That puts less strain on your foot. =)

Timing is all about practice though. Just work on hitting perfectly timed 8th notes at 100 BPM and then keep bumping it up until it's second nature.