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10 Posts
I have a freshly rebuilt 400ex with a 416 bore, weisco 10:1 piston, and stage 2 hotcam. I was breaking it in and noticed that when testing the temp with an Infared Thermometer on the cylinder, the temp had climbed to 250 degrees after just fifteen minutes of putting around. I could be wrong, but that seems way too hot, what could be causing this?