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Is my tach or speedo off? 200 1989

posted by  Andrew240 on  Mon Jul 23 16:32 CST 2007
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last visit: Fri May 4 15:33 CST 2012
[RELATED]

89 244 DL with Virgos on stock sized 195 tires, 3.31 rear, and m47 5 speed.


What RPM are you guys running @ 60MPH? 70? 80?


My calculations show that I should be running 80MPH@3000 RPM. My speedo shows lower than that. So either I am doing faster than what my speedo is showing, or my tach is showing higher revs that what I am really turning.

Idle is steady@950RPM, so I know it is good at idle. Both needles rest at the zero mark properly.


When I am doing 70 on the interstate, it just seems like I am passing people right and left.

Thanks!





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