Last few times I raced, it has been on the warm side around 85-90%F with low humidity. My motor runs best when its a bit hot, and 250 degrees up to 270, still showing good signs of smoke out the pipe. I would run it cooler if it ran well, but it runs too rich at lower temps. I only use mine for racing and use the Lola body too.

I heard recently that Futaba owns O.S...... I had no idea.