Torque Management Advance – one more source slain?

For today’s test I increased the pressure delta. One test (pictured) had no TMA at all (yay)

Boost comes right up, and torque is pretty flat. Cooler day, so almost SAE1349 conditions with a small correction factor of 0.2%.

The other test sample for today does show some TMA.

The rate of increase may be addressed now, but I note that the new TMA happens when Cylinder airmass exceeds 1.32. More study is needed; that is below the current tune knock airmass table. I suspect this is a 3rd source of TMA however.

This chart compares total cylinder airmass with boost and TMA

Cyl Airmass to Boost to TMA

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