I'm on something like the 8th trip back up to the tuner. Besides still pinging at wot, it audibly and steadily pings at hway speed 55-65 climbing slight hills, when rolling into the throttle in 3rd and 4th gear, and at 30-40% throttle accelerating through the gears. So I asked them to reduce wot timing again, and make the cruise timing back off more effectively as map pressure goes up (Vac goes down), like conventional distributors have done pretty well for 80 years now.
This is the reply I got:
"MAP doesn't dictate timing on that platform, it is based on air density largely determined by MAF. The MAPxRPMxIAT calculation is largely just a sanity check against the MAF."
Does that sound right to you guys? Isn't map and manifold density essentially the same thing? I have trouble believing the powerful 0411 can NOT adjust timing based on manifold pressure/vacuum..