MAF (g/s)

[Guest |350|]

Hi Ray

When I try to select Mass Air Flow (g/s) as Y-axis in the fuel-map I get Not defined! after pressing Apply. MAF-input is selected and a MAF cal-table is also selected

And Mass Air Flow (g/cyl) is a little strange. It want to have relative high numbers.

When I select (g/cyl) and apply then it writes "Mass per Cyl (x100) (grams)" next to the Y-axis So... I'm a little confused now.

I can only have 0.1-steps at the Y-axis and I think 0.1 is a big step when my engine at max boost will get about 0,8 grams of air per cylinder.

I would prefer g/cyl or mg/cyl because it will rise the same way as the boost pressure.

oh.. when I was going punch numbers in to the cal-table I could not select 0.5 , 1 , 2 - 5 volt which I had planed to do.

My original cal-table

Volts Air Flow (mg/sec)

0.50 3250

1.00 7910

1.50 15580

2.00 27990

2.50 46730

3.00 72570

3.50 107140

4.00 148340

4.50 198450

5.00 276730

Can you tell what is wrong with all this MAF-crap -it should not be so difficult(y-axis in fuel-map)? And maybe how to fix it?

Nice if it will be fixed in a later ver. :mrgreen:

I know that not many people want to use the MAF because accurate cal-tables is needed and (I think it is hard to get the correct one)... But I would like to use the MAF anyway.

[rayhall]

I have no problem setting the Y axis of the fuel table to Mass Air Flow (g/s) or Mass Air Flow (g/cyl) in the current 4.5.1 firmware. The values for the axis can be any value from 0 to 500.

For the analog input signal select MAF Meter and select a Cal table.

Set the table setting like this...

Input Units = Volts

Output Units = g/s

Output Table Start = 2

Output table increments = 20

Then divide your mg/s by 1000 to give you g/s. Add the values to the table.

Ray.

[Guest |350|]

have just tried the ver. 4.5.1 but the MAF (g/s) still not working - Not defined!

For the analog input signal select MAF Meter and select a Cal table.

Set the table setting like this...

Input Units = Volts

Output Units = g/s

Output Table Start = 2

Output table increments = 20

Then divide your mg/s by 1000 to give you g/s. Add the values to the table.

I know that, but when the info about the sensor is:

Volts Air Flow (g/sec)

0.50 3,250

1.00 7,910

1.50 15,580

2.00 27,990

2.50 46,730

3.00 72,570

3.50 107,140

4.00 148,340

4.50 198,450

5.00 276,730

- I don't want to have a static increment value at the output. In this situation a static increment value at the "volt-axis" would be ok. An opportunity to have axis-setup when it's only a 2D-table would be great(so it is possible to put in the accurate numbers instead of figuring out the voltage at certain MAF-value).