Quote:
Originally Posted by ztan
James and mad-sb:
Can either of you provide a quick how-to on getting port/DI fueling right?
Is it worth re-scaling MAF first, or trying to balance fueling first with the stock MAF scale?
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my method was to scale the maf against 100% direct injection on pump gas (so no consideration for injector scaling or fuel density), then scale the ports against that maf scaling. it's worked well for me. it's extremely critical for drivability that the port and direct both be as spot-on as possible. even a little bit of error between the two can introduce a whole bunch of suck.
of course ideally you'd scale the maf against stock injectors then install the bigger injectors and scale them independently. the important thing is just to maintain process separation between the two, and not allow the influence of one to skew the data when setting up the other.
pm me if youd like more detailed information. i will have a screencast on this process once i get some time to make one.