blow through MAF is good provided the MAF doesnt leak. Z-32 MAFS can be used in this arrangement fairly well, however they are a bit bigger than you realize, and finding a straight piece of pipe on a FMIC kit to mount it on is a bit of a challenge. not to mention most FMIC piping is 70mm and the Z32 MAF is 80mm internal (~84mm external) so you are going to need a couple of 70-80 mm reducers to make it work. or you could just ghetto rig it with straight couplers and t-bolt clamps. it does have the advantage of mounting the BOV before the MAF. this eliminates any problems associated with open atmospheric BOV....almost. as compressed air between the TB plate and the MAF decompresses to exit out the BOV you will have a mass flow backwards over the MAF creating some richness...but not nearly as much as a standard draw thourgh maf would offer.

it really seems like the only advantage is to be able to run open BOV with no worries. but that can be fixed for less time and the same $$ by just doing a s-afc2 and calibrating the deceleration air correction correctly.

I dont see the sensor posing THAT much restriction when placed before the turbo. especially at the power levels that most people are running SR's at. i mean look at it....it's a 80mm opening, with a small stick inside it!! the air has to neck down to smaller areas than that just to get into the turbo.

lastly, it hink you can get better responsiveness by locating the BOV as close to the TB as possible rather than locating the MAF as close to the TB as possible. keep the column of air moving between shifts...thats a big key to response.