- cl_maxpackets should be equal or half com_maxfps.
- snaps should be equal sv_fps or half sv_fps for some smooth packets transfer.
- if snaps is half sv_fps then cl_packetdup should be 1.
The convention in quake engine was to get sv_fps to 20 or 30, thats why snake is right when he says having snaps to 40 will always make you fit the situation.
Dont know which effect would give sv_fps 85, i did some secret tests on FORCE Main server some time ago, and noone found any change (better or worse).
After some tests @ timenudge i found it really helped a lot when being on servers with high ping (like jap servers) ; thats why i say it could be useful to re consider the restriction about this cvar.
Pbbans recomendation (in MCI) : pb_sv_cvar cl_timenudge in -20 0
We are offtopic btw 