Originally Posted by
06300CSRT8
thanks, really appreciate it. My guess is the stock values should be used as a reference point, and change by percentage from there.
SO my stock values are damn near close to 1.000 at zero vacuum, and go to 1.013 by -10 kpa but that's it. I would assume the ECM is going to extrapolate that out past -10kpa to whatever boost I am running, which I can solve for based on the couple cells I have and figure out a slope. My guess is by setting to all 1.000 I have actually reduced the amount of fuel called for versus my stock values. This would make sense given the huge increase in fuel pressure in my system, but maybe its not as simple as zeroing out the factors (i.e. setting to 1.0).
My only guess is the injectors fuel flow isn't linear across dynamic pressure, i.e. increasing rail pressure by 10psi does not equate to having 10psi more manifold pressure hitting the injector tip. Its plausible, but I would think others would have already found this issue.