Built a Glasair IRG powered by a Subaru EG33 engine. My wife has a Glasair Sportsman with a Lycoming IO-390.
We are a member of the Sport Air Racing League and have run our Glasair in 22 air races. We hold the class speed record, with an average speed of 261.60. These are slalom type courses of about 150 miles.
Glasair 1RG / Subaru EG33