P28 V.S. P2P timing/fuel

[sparky]

i've noticed since switching to the p28 that the timing and fuel seem a bit off, yeah i know i should have it dyno tuned, but i'm curious if there's a map for the D16Y8 (pretty much stock map would work fine for me)

or if anyone could explain to me the actual differences in the timing/fuel maps between the two very similar engines?