Well its kind of confusing but here it goes.
Its a simple chem formula, the combined gas law:
P1 x V1 / T1 = P2 x V2 / T2
In which you would compare the turbo's, one turbo on one side, and the other on the other side.
So lets say we are trying to find the volume of air moved, in which we will solve for V for the right side.
Let P1 equal Say 29.7psi (29.7-14.7 (standard pressure for psi) = 15psi, thats what it would read on the gauge), and it fills say a 5 liter area (the intake manifold, the intake hat, and the pistons that are in the intake stroke, remember not all the pistons could be down to there lowest levels all at once. Lets say that the little turbo is out of its effeciency range, and its super heating the air to 100*C (212*F) (you then have to convert celsius over to Kelvin, you add 273 to the celcius temp to get kelvin. You have to convert to Kelvin in these equations). So it is putting out an air temp of 373 K (you dont use the degree sign with Kelvin). Then lets say the bigger turbo is putting out the same 15psi (which we have to use 29.7 in the equation), but at a temp of 30* Celcius (303 K). So I will set up the equation
29.7psi x 5l / 373K = 29.7 x V / 303K
= .3981 = .0980 x V So divide both sides by .0980.....
=:***: 4.something liters......hmmmm, one would think the bigger turbo would fill a larger area of space at the same preassure right....I assumed that going into this, but the math (might be wrong) proved me wrong. So then I will deduce what the heck I have just descovered here.
The smaller turbo, at the same pressure as the bigger turbo will fill more space because why, anyone? I'll tell ya why, because things take up more space when they are hotter. Does a hot air ballon take up more space when the gas is hot, or cold (hint, they have to do there little burn to go up, so it would increase area displacing more weight with the same gas, so it has more lift). The bigger turbo, will produce cooler boost, which I have in my head as taking up space. Remember that when a gas is compressed enough, at a low enough temp it takes up way less space, because it turns into a liquid (1 mol of a liquid gas, such as liquid nitrogen, than if it was a gaseous 1 mol). So I guess what I have descovered here is that a smaller turbo that is out of its effeciency range will actually fill an area with boost better than a bigger turbo, but the bigger turbo, filling less space, will actually cram that space with more oxygen. So if the the bigger turbo was to fill the same space as the smaller turbo, the 5liters, those 5 liters would be cramed more tightly, thus it would be denser, and the more dense, the more oxygen per volume content, therefore you have more oxygen in there.
Yeah boys, thats how its done right there