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Old April 6th, 2004, 16:34   #9
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Join Date: Aug 2001
Location: 96595
Fuel Economy: 53 mpg @ 70 mph
Default The absurdity of fixed percentage drivetrain loss

I guess we should change Davin's post to mathematicians, chemists, scientists and engineers.

When I drive my tdi for extended periods I sometimes get out and rest my palm on the tire treads, sometimes even the transmission. There's maybe a tenth or two hp in BTUs transferred there (think LaPlace equation here). The correction factors that these snake oil peddlers and wrench turners are using is HUGE. I would guess our tdi 5 speed in fifth is like 99.5% efficient, probably 95% efficient in 1st, 2nd and reverse, figure a little less for the tires.
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