Is it possible to overclock them in some way?? Running mine for some time now, and with the cooling i got, they are steady at 33C so i wonder if i could get more ghash of them.
Yes it is possible to overclock them. I believe cgminer automatically tries to overclock them up to the thermal limit of their firmware. With bfgminer you can set the oscillator bits from the "M"anage devices menu and selecting your BiFury and hitting "O"scillator bits to change the setting.