I am tuning a 2004 5.3 with dual exhaust ported throttle body and a aftermarket intake tube I am working on tuning the maf but I?m not sure how to setup the maf filters to get good data and what to use as filters?
I am tuning a 2004 5.3 with dual exhaust ported throttle body and a aftermarket intake tube I am working on tuning the maf but I?m not sure how to setup the maf filters to get good data and what to use as filters?
Be sure to log Mass Airflow [Mass Flow Rate]
Use this filter:
Code:ABS([50040.71]-[50040.71.shift(-10)]) < ([50040.71]/[50040.71.shift(-10)])*0.1
Ok thank you
Sirius, for us formula challenged newbs what is being filtered out?
It's making sure MAF airflow isn't in a transient. Apply the filter to the fuel trims or wideband error table.
https://forum.hptuners.com/showthrea...ynamic-airflow
Post #128.
Is this the only filter needed to get good data or should I be filtering anything else for maf tuning
For just MAF tuning should be all you need.
If you put that filter formula in as a user math you can plot it against mass airflow rate (g/s) to see what it's doing.
Ok thank you, that is a very informative thread that you I will have to read the whole thing some time. I am also wondering what filters you use for ve tuning?
For VE using MAP is sufficient.
Code:ABS([50030.91]-[50030.91.shift(-10)]) < ([50030.91]/[50030.91.shift(-10)])*0.1
Ok thank you
Hold on. I just remembered that you won't be able to tune WOT with that MAF filter. On the DynAir thread you'll see a OR TPS>95. Mass Airflow (rate) will be changing too rapidly.
Add the TPS term:
A really basic, yet effective, filter is to use the MAP sensor value. It's similar to filtering TPS, but a little more accurate. This can be used for either MAF or VE tuning just as filtering TPS would be used:Code:ABS([50040.71]-[50040.71.shift(-10)]) < ([50040.71]/[50040.71.shift(-10)])*0.1 OR [50090.156] > 95
Technically, the most accurate is filtering both airflow models so that they are simultaneously stable:Code:ABS([50030.91]-[50030.91.shift(-10)]) < ([50030.91]/[50030.91.shift(-10)])*0.1
However, I've found that Volumetric Efficiency Airflow can't be logged on some. So, substitute the MAP sensor value to the filter:Code:ABS([50040.71]-[50040.71.shift(-10)]) < ([50040.71]/[50040.71.shift(-10)])*0.1 & ABS([2311.71]-[2311.71.shift(-10)]) < ([2311.71]/[2311.71.shift(-10)])*0.1 OR [50090.156] > 95
[CODE]Experiment with them to see what gives you the best results.Code:ABS([50040.71]-[50040.71.shift(-10)]) < ([50040.71]/[50040.71.shift(-10)])*0.1 & ABS([50030.91]-[50030.91.shift(-10)]) < ([50030.91]/[50030.91.shift(-10)])*0.1 OR [50090.156] > 95
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