Quote:
Originally Posted by jamesm
the main difference between that and what i do is that i don't mess with the di stuff. my theory is 'didn't change it, don't touch it.' so i first log DI only, scaled the maf just generally up and down against that (always tuning larger maf housings lol), then log port only and tune latency and scaler from that (with a now known-good maf as far as the scaling for size), then combine and fine tune the maf.
you can get fueling error across the board within 3% in a couple hours this way. i'm not sure it's the best way, but it works for me.
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For sure, it think we just have different approaches to the same end.
Here is why i started doing it this way, gdi scaling changes over the rpm range and can be fine tuned as needed.. port you are just stuck with, except for the MP comp table for port. Because of this, I would use port injectors for doing the maf curve then dial in DI once the maf curve is done: