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Old 01-01-2015, 10:56 AM   #91 (permalink)
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Just played around the tool and it would be super sweet if you could add multiple engine efficiency numbers based on speed. You can "easily" calculate those from BSFC maps. Then the calculations would be more accurate at wider range of speeds.

Now in this calculation I know I will get 3 liters at 62 MPH with actual 36% efficiency speed but its off 40 MPH speed. I know the efficiency at 40 MPH in my car will be about 33%. That aint big difference but if you use that 5-200 MPH calculation there start to be some real differences in engine efficiency. I can calculate multiple points and make my own chart but maybe it would be easier if the program would do it automatically if you add your engine efficiency point there?

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Old 01-01-2015, 11:23 AM   #92 (permalink)
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I plugged in my numbers using .015 for Crr and .8 as drivetrain efficiency and the mpg numbers matched what I've been seeing on the instantaneous readout from my tripminder.

Now to see which metric returns the biggest difference in mpg with the least amount of change!
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Old 01-01-2015, 11:48 AM   #93 (permalink)
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It looks like, if I reduce my curb weight by 200lbs, swap in a manual transmission and shave .02 off of my drag coefficient I should be able to hit 31.3 mpg @ 55 mph... in theory.
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Old 04-17-2016, 11:24 AM   #94 (permalink)
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Hmm...I'm not sure if my "metro" 1.0l engine will be able to put out the 282,372 watts of power required to get me up to 200mph. Maybe if I remove the passenger side mirror...

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