3kgtevo

I would like to know what changes would need to be made in ecuflash to the maf parameters when changing the size/diameter of the maf inlet.

I know for sure that the parameter "maf size" would need to increase. For example if you add 50% surface area of the inlet then the "maf size" would be increased by 50% from 357.5 g/s to 536.25 g/s.

But what about the other parameters like "maf scaling", "maf adder" and "maf smoothing". Could someone explain them and if the need to be increased aswell.

3kgtevo

I figure maf scaling would be increased 50% aswell because of this formula.

"MAF size = grams of air/second −1D MAF Scaling = Load – 1D, g/s – 2D"

What about maf adder? What does it do?

3kgtevo

come on now, no tuning gurus on here?

todd6027

iTrader: (10)

What exactly are you doing whats the new maf off originally

3kgtevo

Don't know if I understand your question but ill answer what I think you mean to ask.

The maf itself can coun't air to about 560 hp but the inlet size of the maf is only 3" diameter and becomes a restriction past 400hp.

todd6027

iTrader: (10)

who told you this ????

211Ratsbud

iTrader: (1)

Surely plenty of fp black users have had maf tunes high powered. It maybe a restriction but it's not a rubber stopper.

I've seen oem mafs on gt 35 series turbochargers too no issues

todd6027

iTrader: (10)

exactly , maybe the tuner is the restriction

wreckleford

iTrader: (2)

If I wanted to do this I would try logging rpm, boost, load and maf Hz and then after modding the maf I would do the same and try to see how maf hz and load change for the same conditions. Then try modifying the scaling and maf size to come back to the same load for the same operating conditions.

However, this is probably the same or more work as doing a speed density tune, so I would just go speed density instead.