MAF Cal Logs

[craig_tf]

Hi Guys,

Just made some logs for the MAF Cal, could someone have a look and see if they are ok

[mituc]

Nope, they are not ok. You're running pretty lean. By example when the commanded lambda is 0.74 the actual lambda is 0.77-0.78. That's not too much, but it's something that needs to be addressed.

[craig_tf]

Ok thanks, I'll get some more logs done tomorrow so I get an average. The lowest volts were 2.25, how do I get the lower volts so I can log them?

[mituc]

For the lower volt readings you can use a lower gear, say, 1 or 2, and start from idle RPM and raise the engine speed gradually and slowly.

Depending on your intake (assuming it's not stock) you may need to scale some values you will actually never see, basically anything above 250-270g/s.

Also, before you start taking logs for your MAF calibration make sure you driven the car for a few miles (at least 15-20, ideally at least 50) only at part throttle and ideally in all gear/rpm conditions (get up to 5000-6000rpm in 2nd or 3rd, but do not go WOT just yet, heavy part-throttle is enough to get up to 180-200g/s readings).

[craig_tf]

Taken more logs today in second gear and got the voltages I need. Been reading Abilor's tuning guide which has really helped my understanding of the MAF Cal

[craig_tf]

All done now, got the actual and desired both the same. Thanks for your help