Liquid Cooled’s test Cherokee has a sealed top cowling. Cylinders are water jacketed.

by Joe Godfrey

What if there were a simple way to get more power from a piston aircraft engine while doubling the TBO? Potentially, there is. It doesn’t come in a can, it’s done with the most basic chemicals and it’s been field tested by millions of engines for more than a century. You’d develop the same power but with CHTs about 200 degrees cooler with no worries of detonation or frying the engine with ham-handed leaning. You already have all this in the car you drove to the airport. It’s called liquid cooling. …