Quote:
Originally Posted by MetroMPG
This sounds to me like the classic misinterpretation: "best BSFC RPM = most efficient cruising RPM". But I could be wrong, not knowing the TDI well.
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MetroMPG,
We started with BSFC because DSFC would require that we know a lot more about rolling and aero drag than we could ever possibly know, considering the car wasn't built yet. Correct me if I'm wrong, but it seems to me a DSFC map could really only be made after the car exists and its drag properties are known.
Besides, just looking at BSFC smacked us up against the tallest gear available, so there didn't seem to be any purpose nerding out over it any longer. Does it really matter if the ideal gear ratio is 10% taller than the tallest we can get, or 15% taller?
Educate me if I'm just being dense.
-Dave Coleman