I have The ESM Giant scale Spitfire with 55 cc DLE-55R engine and I keep having Engine overheating problems. I just ran it today with the cowl off and I have done it a few times and it runs great. The RPM WAS only around 5700 with a 22x10 prop and a 32 to 1 oil to gas ratio . I have cut the cowl so the complete cylinder is showing and back to the firewall in back of the muffler and approx. 1 inch on both sides of the cylinder.. Could it be that it is trapping hot air on the top ? thwere is really no room for the hot air to escape from the top where the crank shaft would be only the area of the cylinder head.. Any suggestions would be appreciated. I saw 1 thread with the wire mesh in the front of the cowl, mine is cut almost similar except mine is cut staight back past the muffler. to the firewall.