however - what you need to bear in mind is that the larger the bead you print with, the greater the need to cool it as quickly as possible.

A large bead will slump under it's own weight and take more time to cool and solidify than a smaller bead.
So, depending on your printhead setup - you might need to up the cooling power, or at least concentrate it.

Otherwise, you could end up printing slowly and not actually gaining any build time over a smaller nozzle you can print faster with.

I have printed a 0.4mm layer with a 0.4mm nozzle. Simplify3d complains about it, but it works fine.
I regularly print at 0.4 with a 0.5mm nozzle.
So arguably, with a 0.8 nozzle and sufficient cooling you could go up to a 0.7mm layer height.

Also don't forget that you're pushing more plastic through faster so will most likely need to up the hot end temperature as well.

It's all about material flow, slump and set :-)