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Old 11-13-2012, 03:00 AM   #11 (permalink)
wmjinman
Master EcoModder
 
Join Date: Oct 2012
Location: Carson City, Nevada
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Jimmy - '00 GMC Jimmy SLT
90 day: 21.18 mpg (US)

The White Gnat - '99 Suzuki Swift
Team Suzuki
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Quote:
Originally Posted by redpoint5 View Post
The answer to my question that seemed most reasonable is this;
OK, question # 2, then: How do I find my car's BSFC?

And I guess my test showed that 60 mph must have moved the engine's RPM out of the BSFC range? - and I guess 35 mph moved it out of that range on the other end?

One thing I did find interesting was that 40 mph, which I believe (from some basic testing) is my best MPG on "nearly level" ground is also "in the grouping" of best MPG speed on the hill (that paarticular hill, at least)

And from what redpoint is saying (and quoting), maybe the reason it was just as good at 45, 50, and *maybe* 55 is because the BSFC (what is that, anyway - Best Specific Fuel Comsumption?) increases with speed at a rate that just offsets aerodynamic drag???? - but on level ground, with fighting gravity not being in the equation, the BSFC and wind resistance balance out at 40?

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