|
I did it the other way around, added more boost for any given injection quantity through a simple bleed in the pressure line to the ECU. FE went down, probably due to higher back pressure from the VGT vanes.
Fuel in my TDI is being recirculated to the tank. At operating temps the fuel sensor in the injection pump reads around 50 C. I doubt there would be much to gain.
Fuel in a diesel does not evaporate, it atomizes and the small droplets burn. Lean mixtures in a diesel generate lower EGT. Never heard of pre-detonation. how can it predetonates without fuel? Fuel is injected right when it needs to start burning after a very short delay.
Off course I'm talking about a VW TDI with a VGT turbo. If you have a mechanical IDI with a wasgated turbo things might be different a bit.
|