I don't think that would prevent you from falling asleep, but you would get more benefit from the nap if it is earlier, so your waking periods are more even. You should also be able to sleep less at night, typical biphasic schedules have a 6.5 hour core.
This is the public group instrumental rationality diary for November 16-30 (that I've now fished out of my drafts folder, *cough*.)
The poll earlier this month seems to be sufficiently in favor of maintaining the current schedule that extra votes are unlikely to change things much, but if you'd really like to register your opinion, you are welcome to do so here.
Thanks to cata for starting the Group Rationality Diary posts, and to commenters for participating.
Immediate past diary: November 1-15
Rationality diaries archive