Actually, that sounds a bit low. At 70mph, I am running about 3600rpm. I believe I have the 4.1 gear differential? You may have a 3.9. What speed are you going when it's at 2800?
Miata 2000 3000 rpm at 80 kph, is it normal?
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How fast are you going at 2800 in 5th?
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