Quote:
Originally Posted by Jim Caughlin
Not only that but EGT raises very slowly, the temp you see at the finishline is more like what the engine saw at the 1/8 mile mark. EGT is more to see that all 8 cylinders are equal, Oxygen sensor is the tuning device.
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Jim is correct. By the time you are in the top end and shut down the engine unless you have a data logger, the ambient air will cool down the headers. That's why I prefer an AFR with datalogging.