My above post should read from the first sentence, "One of the guys... " just to set the record or my bad typing straight!
Yes well, no real Voodoo science here. Air intake directly above the crank/bearing casting... starting, say from 1cm back from the spinner.
Forces the air over the hot spot, down around the cylinder and out the pipe tunnel. The biggy is that it's position's on top! Side intakes do basically nothing to assist cooling unless the engine is mounted horizontally... which isn't the case with our's. They're more like drag inducing inlets than cooling inlets.

I'm doing the mod' to a new airplane at the moment. Found an old glass wheel pant, cut of a suitably curved part... cut a nice hole in the cowl area above the crank, stick on the part, blend it in and spray it up. Sounds horrible? It's isn't anywhere near as big as you'd imagine by reading the discription!

Thing is, it all makes a lot of sense. We're burying these high performance, inverted engines, deep inside a streamlined cowl and behind a giant spinner! Sure they're going to get warm. The fact the many folks are gaining sucess by adding some head shins to lower the compression, thus reduced the heat... just enforces the point.
We've been burning out the bearing!