Originally Posted by CosRush
If i were to improve airflow through my plenum, this would cause the VE to change.
The change should effect the entire map making it leaner throughout due to any increase in airflow, but what im wondering is can this be corrected by increasing the fuel pressure???
i.e. With the car running as it should (runs sweet
), fit modifed inlet then road test car, take lambda readings, adjust fuel pressure up and retest until lambda is restored to original setting......
Would this work???
The difference that the Intake manifold would make to power output would have to be quite substantial to warrant an increase in fuel. For instance if the intake manifold gained a 10% flow increase at a particular rpm/load point then you would expect a 10% gain in power at that rpm/load point and offcourse 10% more fuel would be required and possibly a decrease in Ign advance due to the increased in dynamic compression.
If there was a gain you will find that the gain will be at boost/certain rpm’s only and not at light throttle/cruise. If you increase the fuel pressure to compensate you will find it “may” help at certain rpm's/load but not everywhere and may run rich at light throttle/cruise due to the increase in fuel pressure.
I'm talking from experience based on the re-tuning i did on my Autronic ecu once i fitted my Intake manifold to my cossie.
Good luck with it mate