Brake "specific fuel consumption - Wikipedia, the free encyclopedia
Any engine will have different BSFC values at different speeds and loads. For example, a reciprocating engine achieves maximum efficiency when the intake air is unthrottled and the
engine is running near its torque peak."
of course thats wiki and a consensus position ,
some charts for the curious
Brake Specific Fuel Consumption (BSFC) Maps - EcoModder
http://gm-volt.com/forum/attachment....8&d=1323735475
http://www.turbodieselregister.com/t...1_FEimage1.gif
start ups with a manual transmission is only the beginning of the process , how will you manage cruise
my best FE speed ON THE FLAT is about 40 MPH @ 2200 RPM , however its rolling hills around here and the first grade i came to i would have to downshift, therefore i burn hills up and down .try to hold 10 INHG or better on the upgrade no less than 5. then when i top grade and start descent, maintain 15-18 INHG .which is a pretty light throttle setting . machine will be accelerating ill run it out pretty fast if the downgrade is long enough and john law is not around, then on the next up grade hold 15 INHG >10>5 , at 2200 RPM look for a lower gear.
i worry about FE to keep my tank range up. i only logged 3 K miles last year , but in a misspent youth logged about 20000 hours *throttle time*
as i learned through time i tended to use the EGT more along with the exhaust note and engine vibrations , not to mention the tachometer
2 sticks and 15 forward gears