VIDEO MISTAKE The prop is not a 2312. It is a Biela three blade 2212. The final cylinder temps at idle after the intake mod are 144145147. If you would like information on this mod or other RC engine mods contact Ray English at [email protected]. He is retired from Marlin Lindy Cars as one of their engine designers and has been modifying RC aircraft engines now for 15 years. He's the best I have ever seen and a super guy to work with.