With push and glide I have made this kind of graph. Sorry about its quality.
https://fbcdn-sphotos-h-a.akamaihd.n...56964842_n.jpg
So I should reach two liter fuel consumption if push average is 3,4s and glide 16.6s
this means respectively also that two liter is reached with 1,7 s push and 8.3s glide. I believe its closer to that 1.7 push times.
Efficiency tuning means changing injection timing and fuel amount injected. I will install those bigger injectors which will deliver the fuel faster so I can use later injection times and still get same amount of fuel to the engine. So basicly I can deliver the fuel more precisely where and how much I want.
Tuning will be made using wideband lambda sensor, backpressure, boostpressure, exhaust temperature meters and lots of test driving on the road and in the dyno to make own BSFC map for current setup.
Optimum efficiency is reached somewhere the back pressure does not get much higher than boost pressure.
Car is tuned for at least two different drive scenarios depending on the gas pedal position.
0-30% no boost pressure so steady throttle driving with load
31-80% boost range jumps 0.9-1.1 bar which is current estimation about optimal boost for current turbo and engine setup. Need testing and tweaking on dyno. This sector is so wide that its easy to get correct gas pedal position when driving for efficiency.
81-100% max boost what current setup can deliver and that will be find out later this week. at the moment 1.55 bar but thats not enough. At the moment we have to lower boost to 1.25 bar at 4700 rpm due to too high (2.5 bar) back pressure.
Tomorrow that should be in the car and testing can continue. I also get the 3 bar map pressure, because stock map scale ends at 1.6 bar.