Draw Through vs Blow Through MAF
Cali,
My engine is Normally Aspirated by OEM design. I use the NA Hot Wire MAF in blow through mode with no problems.
I have visited sites where the engine developer tried blow through and then reverted to draw through. Supposedly giving a smother idle or some such. I tried to find a link but no luck...may turn it up later.
With regard to the physics all I can say is that the MAF will need need an air temp. measurement from the air stream entering the MAF to help the computer work out the mass flow.
Pressure x Vol. Flow Rate = Mass Flow Rate x R x Temp.