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Old 12-06-2010, 09:35 PM   #20 (permalink)
d0sitmatr
n00b.... sortof..
 
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Join Date: Oct 2010
Location: SFL
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silver fire - '03 Mazda Protege5
90 day: 32.52 mpg (US)
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Quote:
Originally Posted by comptiger5000 View Post
If the larger tires helped significantly, that means the vehicle was over-geared greatly. Typically, the aero hit from larger tires and a lift would more than offset the gains from the taller gearing.
these are overgeared pretty high.
my 98 outback w/ manual was a steady 3300rpm at our hwy speeds of 70mph.
the engine in the OB (2.5L boxster) could easily handle much lower rpm.
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