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Old 12-10-2007, 07:21 PM   #9 (permalink)
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Location: Melbourne
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The Mighty Mira - '92 Daihatsu Mira
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Originally Posted by MetroMPG View Post
Um, yes please. Will try out the 4-valve version shortly...
Urg. That's a bit of work. If someone feels like printing out the 2 valve engine map in the spreadsheet, drawing a line between (2000, 102) and (5200, 125), marking every gradation from 0.40 (estimated) at (2000,102) and 0.565 (estimated) at (5200, 125), i.e. 0.40, 0.41, 0.42, ... 0.56 by interpolating between the lines, and measuring where they are in terms of rpm, I'd be more than happy to write a lookup function to lookup the correct value.

I might do it later sometime though.

Until then, a useful kludge would be to go into the hidden columns and add 0.05 to the BSFC formula, for rpm at actual speeds greater than 3000rpm
"Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by force impressed." - Isaac Newton
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