I've been concerned about cooling since the very first time I saw a Cozy. Pre-flight, I intend to make two tweaks to the air intake at the stock NACA vent and one to the air exit. If post break in I see climb out CHT's over ~420, there more things to try.

At start, I'm using
a) corner tabs on the NACA duct. This is no more than a bracket added to the rear corners of the NACA, aiming to keep in flow the turbulent air that wants to spill out and away from the air intake. See detail on attached.
b) cooling large scale VG's, creating turbulence at the intake. See detail on attached.
c) small scale eductors. Eductors are said to use exhaust pulses to draw air out of the cowl. Maybe. I need to protect the cowl from the exhaust heat, and I made stainless-lined eductors from CF-Cormat-CF using high temp epoxy. I'm not thrilled with the impact on fit of the upper and lower cowl, but I'll give it a go.

As a backup, I made armpit scoops which I can use to force air iinto the oil cooler. See below a Long EZ example of how such a scoop is part of the lower cowl. In my case the scoop-cowl attach point is to be a square the same size as the face of the oil cooler. Nothing off the shelf can plug and play, so I have to either modify an after market part or scratch build. A Bingelis standard says says I need an additional ~30 in2 of inlet area to handle a 200 hp engine. I can do that with a scoop dedicated to the oil cooler. I created a 2-part mold using 4 lb pour foam, and used my new favorite CF-Coremat-CF. No fancy bell mouth. The stem / support was left long for final trimming after I finish the cowl and install the oil cooler. I made one for the right and one for the left - I don't know which side I'll use for the oil cooler, so one of each.