[ever_green]

I have an 08 evo 10 with a 2L MPFI dual VVT motor and a 6 close ratio speed dual clutch transmission. At 60mph I'm roughly churning 2750 rpm. I have increased part throttle ignition timing and retarded intake valve timing (Atkinson simulation). However what I found is I barely cruise in that region due to stop and go traffic style driving. I'm currently averaging 19-20 mpg combined which is horrific for a small motor although under boost it is capable of putting down 300ft lbs of torque at 3500 rpm. Similarly a friends CLA45 averages nearly 25-26 mpg. I haven't been able to find a BSFC map for this car but I have been trying to avoid boost and accelerate at 1800-2200 rpm.

I can tune the ecu however way I like it such as reducing ignition timing under boost at low rpm so I can lean out the mixture or add more timing and less boost and less fuel. VVT can be tuned...different strategies can be carried out but I'm not sure which would be best. Tire pressure is already near maximum and I have reduced weight as much a single possible which helped my track times but not much my city fuel economy. any advice is appreciated .