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  1. On my 2006 CTSW I recently installed a data logger on my GRT EIS that I use to monitor the engine. I can now see my EGT's graphically which revealed an interesting EGT puzzle. At 4900 RPM, (on takeoff) the EGT's are all very close from side to side and front to back. 4900 RPM EGT1: 1363 EGT3: 1397 EGT2: 1422 EGT4: 1405 (------------ Right ----------------) (-------------- Left ----------------) But when I throttle back to 4660 - 4750 RPM (for cruise) something interesting happens. The EGT's on the front two cylinders goes down a little over 200F. and the EGT's on the back two cylinders goes up about 25-50F. 4660 RPM EGT1: 1238 EGT2: 1269 EGT3: 1421 EGT4: 1467 (------------- Front ---------------) (------------- Rear -----------------) It's a lot easier to see this on the graphs I have attached. The PUZZLE: So what is causing this phenomenon? Is this normal? I have some speculative ideas, but nothing I'm completely comfortable with. So I won't poison your thinking by falsely leading you astray with speculation. I look forward to ideas and discussion by the group. Thanks, Rob If the attached images don't appear here, you can find them on this link. https://photos.app.goo.gl/PRi6wsDANnzYiiqq5
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