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I don't think for shorter durations % of FTP are that useful, maybe more as a description of how good your anerobic power is compared to your FTP?
My last year PB was 550w for 90s at an FTP of 250w, (220% FTP) weight of 65kg. (8.46w/kg)
My FTP is about 290w now, but a bit heavier and legs feel a bit less punchy.My gut tells me that I should be able to push 550-600 for 120s, if I get into super focused training, but life has got in the way a bit this year!
I did 2:11 at 162% FTP last Sunday. Legs felt fine, gasping for air but no burn.