i doubt that the MK3 can get much more timing than the MKIV...
but under WOT and full boost w/ the abscence of detonation, its entirely feasible to see up to 27* of advance by redline. so far, that seems to be the norm that ive seen on cars.
Typically, timing curves take a dump as soon as you go WOT, and then the ECU typically advances timing as the RPM's increase, assuming there is no detonation. if its anything like mitsubishi motors, which the 2jz's seem to be from what youve mentioned, then its relatively predictable.
i think that the stock ECU will advance timing untill it sees knock according to its table. but im not sure if the stock ECU "KNOWS" or if its aware of what the final timing is when it does it. we are supposed to run a base of 10* BTDC, and the ECU advances from there. but... does the ECU just assume its 10* and blindly advance according to its tables? i dont think that the ecu is advance enough to be self-aware of its timing advance. im pretty sure that we should be able to pull base timing out to reduce total timing for incrased boost on pumpgas.
I personally had planned to reduce my base timing in an effort to reduce overall timing while using AFM scaling to tune fuel with raised boost on pumpgas runs.
i think our ECU is technically an OBD-0... plus, there is no readable bus port on the ecu for us to take readings from. i dont know if there is a way to read timing on the fly with any inductive pickup... if there is, we could watch timing on the fly. i have no idea on how to make a converter to make a readable output from an inductive coil on a plug wire.
i wish i had more solid info to give you...
