Your BB is threaded and you're using Campy cups right? Is the BB shell faced? This could certainly have an effect if it's not. As could a lot of grease in the bearings as just mentioned. Facing the shell edge is more critical than chasing the BB threads, as the cups will use the faced edge to settle themselves when all is tight. And it sounds like you've already had something installed in there before, so threads are probably fine. But if the shell faces aren't square then neither will be the cups once installed. Also, there is a seal in the cups that create a bit of drag. You should be able to tell by feel if the drag is due to grease and seals versus something misaligned. When you see Ultratorque Super Record cranks spin effortlessly it's because there is no grease in the bearings (just a very light oil) and no seals in the cups and, of course, everything is aligned. Also, don't use extra loctite on the threads of the cups. I say "extra" because they come with some thick dried compound already on them, which I usually like to remove and use a liberal amount of antiseize. Not to be confused with how you might install Campy cups in a Pressfit application with no threads. The original "preferred" method of using loctite and hand tight was just dumb and only in the instructions because early on too many cups were getting all marked up from using improper tools on them, and no one liked to see their Campy cups with marks on them. Lol. Use a proper tool, and torque down to 35Nm.
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Last edited by Calnago on Mon Feb 20, 2017 7:22 pm, edited 2 times in total.