Dummy load resistors from eBay (100w)

Hey guys,

How many watts can I drive through 100w resistors if I mount it on a heat sink with a fan?
Can I over drive it to more than that?

If for example I take a 60v battery and drive it through 8 100w resistors of 800ohm (resistors in parallel) then it means that the total watts is 756w
Does that mean that the 756w are spread onto the 8 resistors or every resistor takes the whole 756w?

bump....

Equal resistors will share the watts.
With a fan you should be fine at less than 100 w each.

40 ohm resistors?