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Old 12-12-2012, 09:02 PM   #8 (permalink)
ever_green
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Join Date: May 2011
Location: Toronto
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gueff - '19 Mercedes Benz A250 4MATIC AMG
90 day: 30.55 mpg (US)
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Quote:
Originally Posted by RobertISaar View Post
my torque peaks at 4000 RPM, which is where BSFC(fuel used per unit of power produced) is at it's best.
Optimal BSFC is not always where the peak torque is produced, contrary to popular belief. also for city driving, driving with load did not change my overall MPG significantly. That is, i used +80% engine load during acceleration and shifted at 2500rpm. what helped me the most was pulse and glide. interestingly enough the BSFC for my car indicates a wide BSFC sweet spot of 1500-4000rpm at 85% load. however in practice shifting at 3500-4000rpm with 80% increased my trip consumption and got me a speeding ticket for me i just take it easy on the throttle and shift at 2k rpm.

this is a BSFC for a honda s2000 which makes peak torque at ~6500rpm yet it gets best BSFC at 3000 rpm...get what i mean?

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Last edited by ever_green; 12-12-2012 at 09:08 PM..
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