I have some question for MAF experts.

After reviewing data from a long run, i noticed that at the same/very close gps., the Cell Numbers would be different thus giving me different BLM.

For example;

gps cell# BLM LV8 RPM
7.9 6 134 32 1200
7.8 1 119 40 950

So lets say that i want to adjust MAF in relation to cell #1. So when I do that, cell #6 would be out of range, woudn't it?

How are the MAF guys coping with this? Is there a way to adjust that?

Thanks.

 

From what I understand,you will need to make changes in the main spark table.If your rpms is 1200 and the load value is 32 then you will need to change the spark advance @ 1200rpm X lv8 32.Increase the spark to lean decrease the spark to richen.Use only small amounts of advance +-.I am not an expert though and you should use caution when changing the s/a.

 

Personally, I ignore worring about which cell I'm in.

In you case you just need to tal a lil fuel out at 950 rpm, I'd try taking some of the voltage correction out. If you working in hex try taking a value of 0A out of 12-15 volts.

 

Thanks guys.

I appreciate your help.

 

As Grumpy said, ignore the BL cell number. The BL cell boundaries have a hysteresis to them, IOW, they overlap a little. I think in the ARAP bin, the hystereses (plural) are 100 rpm and 2 grams/second.

You'll need to adjust the values in MAF table #1 that border the airflow above. Unless your alternator is weak and your voltage drops at lower rpms, you shouldn't need to mess with the battery voltage correction table.