nope. density will not change due to pressure or temp.

Density = mass/volume

there for more pressure or hotter ait will not effect the density. Pressure will effect the temp and temp will effect the pressuere. but neither will effect the density

 

Density and temp are directly connected. Thats why you use a ic, to lower temps and increase air density. The more dense the air, the more air you can fit in the engine.

 

yeah nvm your right. im guessing that equation is only valid for solids.

 

So, cincy, and bondaga, then you believe that if you move the MAF to the other side of the turbo, that the reading will be exactly the same as it was pre-turbo, because the density remains unchanged?

I disagree, because I believe the air is actually much more dense than it is coming in from the open atmosphere and not under pressure.
If what you are saying is true, then there is no reason for a turbo, or boost, because the air is just as dense as it is before the turbo. According to what i read, the MAF measures air density, not volume, or pressure, or temp. You have an IAT that measures the temp at the TB intake.

I am just trying to understand and learn. Did you guys read the MAF link I posted above? I read a few others as well, and i am still not following your analogy.

 

i never said it wouldnt work i just said that i heard the maf cant handle that side

the correct equation for the density of air is


where � is the air density, p is pressure, R is the specificgas constantand T is temperature in Kelvin.
The specific gas constant, R for dry air is:


Therefore:
[ul][*]Atstandardtemperature and pressure (0 °C and 101.325 kPa), dry air has a density of �STP = 1.292 kg/m3.[*]At standard ambient temperature and pressure (25 °C and 100 kPa), dry air has a density of �SATP = 1.168 kg/m3.[*]At standard ambient temperature and pressure (70 °F and 14.696 psia), dry air has a density of �SATP = 0.075 lbm/ft3 ~ 1.2 kg/m3. [/ul]

 

and a turbo dosn't change the density(indirectly it might)in teh chamber it changes the amount of air forced in, therefore creating a greater pressure in the chamber

 

agreed.

Like i said earlier in this thread, i did it on a mitsu lancer w/ a 28r and it worked well. But that was with a better maf and less heat and pressure. If the vw/audi maf could handle the pressure (doubt it would), it "should" work but the readings may be off a tad. If you have the extra funds, time, and know how, give it a shot, i would be too worried about the maf and not the tune.

 

why cant all cars just come with full standalone and no mafs. that would make things so much easier

 

i would love a map and end user sw, that would be the best factory car ever!

 

Density really doesn't effect the mass airflow as much as you think, its mainly the amount of air volume(compressed or not) im gonna agree with 2kS4, if your not gonna use a bov there is really no point of re-locating the maf sensor.