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over rev counts, artifact

Engine

Model: 997, Year:2005, Mileage:19,000, Type of use:Both Street & Track
My DME shows one ign. event in range 3, 1 in 4, 1 in 5, and one event in range 6. I claim this is impossible. Alocal shop (Callas Rennsport) agrees. The dealer says if it's in the computer it must be right.My original reason for thinking it an artifact was the energy required to accelerate the crank through 2,000+ rpm in only 120 degrees. I've since realized that even ignoring this, the engine would have had to go through the intermediate ranges on the way up and down to get from range 2 to 6 and back to 2 again (at least 2 events in each range). Do you agree? If so, how do I convince the dealer this is a computer error and the DME should be replaced?Tahnks,Dan

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