414TATA Posted October 12, 2011 Share Posted October 12, 2011 I posted this already but I didn't see it come up so I will post again.Thanks for the response. I did a search here for the RPM question regarding what is the RPM on the straight 8 at about 55- 60 mph? I don't see any thing on it. Any one want to take a guess? I don't have a clue, I think I have the standard axle ratio,Wayne 1941 Buick Super Link to comment Share on other sites More sharing options...
JoelsBuicks Posted October 12, 2011 Share Posted October 12, 2011 55-60 mph would be 2611-2848 rpm. Assume 4.1/1 and 7.6 ft tire circumference and high gear.Joel Link to comment Share on other sites More sharing options...
414TATA Posted October 12, 2011 Author Share Posted October 12, 2011 55-60 mph would be 2611-2848 rpm. Assume 4.1/1 and 7.6 ft tire circumference and high gear.JoelThank you.I know my best mpg will be about 55 mph ( slow lane) which is just fine for me.Wayne Link to comment Share on other sites More sharing options...
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