I have searched and can not figure it out. i bought a redtop s13. i bought a greddy front mount intercooler along with a custom hot pipe and a blitz blow off valve. the instructions on everthing are in japanese.... i cant read them! i am tring to figure out if i am supposed to hook up the bypass valve along with the BOV, if so do i tee in the vaccumn line on the BOV into the bypass valve vaccumn line?

 

I don't believe you need the bypass valve if you've got an aftermarket bov. The only difference between the two is that the bypass simple reciruculates the discharged air back into the intake, while your BOV will vent it into the atmosphere. If you're intercooler is like mine, then you're intercooler pipe that connects to the hotpipe has that connection for the stock bypass valve...just plug it. Hmm, let's see, what else...the BOV vacuum line runs to your throttle body, and your wastegate vacuum line runs to your hot pipe nipple. I think that's about it. good luck!

 

u dont need the stock recirculating valve if u have a aftermarket BOV good luck

 

Let us know how it goes...