MAT Timing

[bruce]

Just what works for me:

http://www.t6p.com/forums/showthread.php?p=57490#post57490

 

[TurboJim]

Sorry to keep bugging you, but your posts intrugue me so I like to ask questions..

This MAT change is with a SD setup right? I believe with MAF the tables are zero'd (or close) because MAF and TPS are used to calculate LOAD or LV8 (a totally calculated load variable) which timing values are based from. I imagine MAT trim might be useful for timing adjustments paralleling FAPE. Otherwise in a MAF system, wouldnt your adjustments be added to the load based adjustments rendering one of them redundant and unneccessary? Thoughts?

If by chance you plan on getting to BPG, the first round of Pepsi's is on me...I havent forgotten

 

[bruce]

This MAT change is with a SD setup right? I believe with MAF the tables are zero'd (or close) because MAF and TPS are used to calculate LOAD or LV8 (a totally calculated load variable) which timing values are based from. I imagine MAT trim might be useful for timing adjustments paralleling FAPE. Otherwise in a MAF system, wouldnt your adjustments be added to the load based adjustments rendering one of them redundant and unneccessary?

They're 0'd out in the TRs, but were used in the N/A 148 applications.

TPS is not used in the LV8 calculation.

FAPE is just based on time, MATs raise as a function of heat, while somewhat related, they're not linear, due to ambient conditions, which the MAT addresses.

I was just posting the TR related portion of what I run, I also run an PE MAT to RPM table, for timing, from 100-300 K/Pa.
The more closely you can monitor what goes past the valve, the more accurately you can write code to optimise the AFR, and timing.