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Tach Readings at highway speeds
Yesterday I had the opportunity to play with cruising speeds a bit. The following photos were taken at the 55, 60 and 70 MPH. The process used was:
Relatively flat road as seen through a GPS elevation (it changed only a few feet over the distance).
Car was at this speed with a stable RPM and MPG reading for at least 30 seconds before the picture was taken.
Cruise control used to hold speed.
The readings were easily reproducible on my 6AT.
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