I just got a 9# pulley for my SC since I lost some boost with my mods. Powerdyne says that you need a by-pass valve for anything over a 6# boost. On my current set up the MAF is right after the filter. If I install the BPV after the MAF won't this cause some problems? Should I look at relocating the MAF? I need some advice soon since I want to install this tomorrow before I go to the track tomorrow night. Thanks for your help.

 

The bypass will need to recirculate back into the intake tube after the maf.

 

put the maf on the pressure side....I think it runs alot better on the pressure side

 

I had a HKS BOV after the MAF. When I went to 15 psi (Procharger), low speed fuel was rich (AFR of 10 or less) due to air dump to atmosphere. Thanks to Camaroz28 site, I purchased two bypass valves from evolution motor sports ($130 each). Now running bypass back to the intake and no low speed rich fuel problems. Also cured the surge problem. (383 D1 w/ Spearco - Lt1)

 

Just an observation... are you using an intercooler with that Powerdyne? Those things get pretty damn hot and you need to cool off the intake charge.