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Old 08-26-2008, 09:04 PM   #78
IslandFocus
Focus Addict
 
Join Date: Apr 2005
Fan#: 22161
Location: Bahamas, Bahamas, The
What I Drive: 2000 Imperial Blue Focus ZX3

Posts: 803
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Draw through is when the MAF is before the turbo/supercharger and essentially sucks air through it. In a blow through setup, the MAF is placed after the turbo/supercharger and air is blown through it. Blow through allows you to run a blow off valve, which will be placed after the turbo but before the MAFS. With a draw through setup, a diverter valve is used to divert the boost pressure from your "pressure side" after the turbo to your non-pressure side before the turbo........but after the MAFS.
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