Best GM MAS set-up Options

[KOU In3]

I've done a lot of the reading but I'm curious of the opinions from those who have tuned with them. What do you think is the best GM MAF set-up. Basicly the options are those below:

3" drawthrough
3.5" drawthrough
3" blowthrough

Second question. To descreen or not? I would think there would be less restriction without the screens but I'm thinking the 'straighter' airflow might be better. I've read lots of opinions but no definative data there either. Anything out there from you guys that have been all over the yahoo groups?

By the way, as you might expect, this is a sheer performance question. Not interested in venting for it's own sake. I'm leaning towards a 3.5" descreened draw-through set-up at this point but could easily be swayed.

[natedogg]

but would it really be any worse than the sensor in a drawthrough setup?
I figured that the air is going to be changed, when it passes through the intercooler and turbo, than when its sucked through the filter.

Well the difference comes in the fact that the air after the turbo is pressurized (positive pressure/greater than atmospheric). This is what causes the high pressures to tend toward the outside of the pipe causing faster flow near the outer part of the pipe. The air on the drawthrough side of the turbo is being sucked through (vacuum/less than atmospheric) which tends to create more even air velocities across the pipe diameter. The air also flows more evenly in draw through because it is coming (at least in my case) directly from a cone/cylindrical filter which is designed to create even airflow. In blowthrough the air is most likely transitioning from a 2.5" pipe to a 3" MAF back to a 2.5" in pipe which is quite a bit more turbulent than the drawthrough case.