MAF Info
Posted: Sun Aug 23, 2009 11:50 am
I've been having a bit of a look at trying to work at the MAF info from some BIN's.
Looking at several that have the 8 tables and the scalars I think the following maybe correct.
For each MAF Table there are 12 bytes of data, ie
02 C2 05 00 13 2A 44 61 81 A4 C9 F0 (MAF Table 1 from CNPF, $4D44-$4D4F)
The first 2 are MSB LSB, ie combine to $02C2 which converts to 674 Decimal.
This value is then divided by 256 which gives us 674/256=2.6328
The next one is a single byte, $05 which converts to 5 Decimal
This value is then divided by 256 which gives us 05/256=.019531
grams/ sec = (0.019531 * X) + 2.6328
While this didn't work with the delcowizzids $A6 MAF tables (which area a work inprogress, I think they may need updating), it does work with a $5B5.xdf and AZKT calibration.
Refer attached spreadsheet for calculations I used.
Would appreciate any feedback (good or bad) on this info.
Thanks,
Greg
Looking at several that have the 8 tables and the scalars I think the following maybe correct.
For each MAF Table there are 12 bytes of data, ie
02 C2 05 00 13 2A 44 61 81 A4 C9 F0 (MAF Table 1 from CNPF, $4D44-$4D4F)
The first 2 are MSB LSB, ie combine to $02C2 which converts to 674 Decimal.
This value is then divided by 256 which gives us 674/256=2.6328
The next one is a single byte, $05 which converts to 5 Decimal
This value is then divided by 256 which gives us 05/256=.019531
grams/ sec = (0.019531 * X) + 2.6328
While this didn't work with the delcowizzids $A6 MAF tables (which area a work inprogress, I think they may need updating), it does work with a $5B5.xdf and AZKT calibration.
Refer attached spreadsheet for calculations I used.
Would appreciate any feedback (good or bad) on this info.
Thanks,
Greg