One thing that would concern me having these grooves is pre-ignition. The grooves feature sharp edges which would be 1st to get hot and retain heat.
yea.. but the site also says that the grooves help eliminate standing heat waves.. so I dunno if they would equal out in the end..
<= not a thermodynamcis or fluids guy..
While this mod sounds interesting, it's not one of those that can be fixed easily if it doesn't work out..