Originally Posted by the suicidal eggroll
Probably some non-linearity with those injectors, or some non-linearity with the stock injectors that was being compensated for with the MAF scaling that's now fighting the linearity of the IDs.
Yes, theoretically, you shouldn't need to touch the MAF scaling or load compensations when changing injectors, but 90% of the time you do.
Also make sure you've adjusted tip-in and per-cyl fueling compensations as well.
Since you mentioned it, what are you guys doing to per cylinder fueling?? Zeroing it out?