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Old 08-16-2019, 07:06 PM   #31
Lugnutz65
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Join Date: Jan 2013
Location: Columbia, SC
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Re: MPG and Manifold Vacuum

Quote:
Originally Posted by geezer#99 View Post
Maybe you should try the poor man’s under/overdrive with taller or shorter tires.
Could save some trans gear swaps.
I’ve run the numbers through an RPM calculator. Gear change is cheaper since I can do the work myself. Four new tires would be expensive. Besides, I wouldn’t get the RPMs where I need them unless I used REALLY SMALL tires, which would look silly.
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