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Lambda Table Size 1.1.27 16x14 vs 1.1.62 8x8

Started by Jamo, November 19, 2009, 05:53:14 PM

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Jamo

Just reviewing the various versions and came across the fact that the Lambda Table Size in 1.1.27 is 16x14  but in 1.1.62 8x8

I'm trying to find out why would the size have been reduced and what the benefits of reducing this table size would have been in the higher version?

GintsK

In older firmwares table bins was merged between all tables.
Now - independent for most tables. 16x14 - only for VE because it can be very lumpy on some n/a engines. Spark, boost - 12x12, and some others just 8x8.

What advantages you see from 16x14 lambda table?!

Gints



Jamo

The larger the table the better resolution you have over lambda control for a turbo car in certain rev ranges

I.E you can set it every per 500 rpm rather than every 1000 rpm

GintsK

#3
Interesting!
Do you often need rapid Lambda changes in more than one area over all map?

It is more about rapid changes - lumpy Lambda table, not about resolution. Resolution stays same - between corner points of each square ECU does interpolation.

Only case when it is needed IMHO when parallel with ignition retard bloody rich is desired in some area.  But for one such area 8x8 should be enough anyway. It is possible to put axis anywhere. 

Have you another experience?