Peak fuel efficiency, AKA lowest Brake Specific Fuel Consumption (BSFC),
comes a few hundred RPM above peak torque, and then starts to
decrease the higher in the rev range you go. There are reasons to
exceed the lowest BSFC (the point at which the engine uses the least
amount of fuel for the most power) RPM point, but those usually arise due to other
compromises necessary, e.g., avoiding an upshift to then downshift for the
next corner would be the main one we face.
As has been stated many times on this board, avoiding a pit stop does
more to move you up the leader board than dropping 2 seconds a lap
because you are looking for more HP.
Capt. Delinquent Racing
The One & Only Taurus V8 SHO #31(now moved on to another OG Delinquent)
'17 Vodden the Hell - (No) Hope for the Future Award, '08 AMP Survivor, '08 ARSE-FREEZE-APALOOZA Mega-Cheater