Running the 2bar SD tune on a 2010 LS3 E38 with a Whipple.. been fine for a year, now trying to enable Dynamic Airflow but its not going well at all.
I tuned the MAF only and it runs great, within 1-2% from perfect, also tuned the SD tables with MAF disabled, and unplugged, and also have them within 1-2% from perfect, they both seem pretty consistent from day to day.
Now when I enable MAF MAP "Dynamic" mode up to only 1900rpms for testing, the WOT fueling is very lean, it starts only slightly lean right off idle, then by 1800rpm it's about 12-15% lean, then over 1900rpm it comes back to normal, 1-2% rich since it's back to pure MAF. If I add ~15% fuel to the SD tables in this region without making any other changes then fueling is ok... but then my SD table has huge spikes, and is obviously not right...
I don't really have any values adjusted in the "Prediction Coefficients" below the "Dynamic Airflow" enable/disable...
What do you think? Confused... Tune attached...
2B095 MAP MAF LEAN.hpt