So KFZWOP is essentially an MBT timing table, for gasoline, at lambda 1 (ie. the desired timing one would ideally want in a stock S4 if it was running Q16 or something). So, with E85 having both a different stoichometric ratio, and peculiarities relating to combustion that affect the optimum ignition angle when compared to gas, why would KFZWOP not need to be touched when going E85?
Because it is not used for anything apart from ignition angle efficiency calculation. The ignition angle is going to be always 100% efficient because there is no detonation on E85, at least on stock CR.
E85 also never needs BTS enrichment, because the EGT's are always very low, so this map is just not important. It does not do anything relevant to running the engine when on E85.
