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dcb · 04-13-2010, 09:03 PM

I think the rule of thumb is that gearing changes are marginalized without a corresponding aerodynamic change, it moves you left (rpm) on the bsfc chart, but since the power requirements are basically the same it moves you up the load axis. So if you happened to be southeast of the bsfc sweet spot then you might get lucky, but generally it doesn't work like that.

04-13-2010, 09:03 PM	#20 (permalink)
dcb needs more cowbell Join Date: Feb 2008 Location: ÿ Posts: 5,038 pimp mobile - '81 suzuki gs 250 t 90 day: 96.29 mpg (US) schnitzel - '01 Volkswagen Golf TDI 90 day: 53.56 mpg (US) Thanks: 158 Thanked 269 Times in 212 Posts	I think the rule of thumb is that gearing changes are marginalized without a corresponding aerodynamic change, it moves you left (rpm) on the bsfc chart, but since the power requirements are basically the same it moves you up the load axis. So if you happened to be southeast of the bsfc sweet spot then you might get lucky, but generally it doesn't work like that. __________________ WINDMILLS DO NOT WORK THAT WAY!!! Last edited by dcb; 04-13-2010 at 09:11 PM..