I just picked up a brand new blow off valve for a pre 91 Saab 900. Is it usuable??? If not... not a big loss, it was only 25 bucks.

 

probably a recirulating bov, sometimes called a bypass valve, dumps the pressure back into the intercooler.

also, veyr little sound.

got a pic?

 

Recirculating? Isn't that what I'm looking for. An open BOV creates an over rich condition in between throttle doesn't it.

 

with a MAF system, a normal BOV can create an over rich condition durring venting. Recirculating it back into the intake tract, between the MAF and the Turbo would be the "easy" way. Most folks just say screw it and deal with the rich condition, it only happens momentarily between shifts/when venting.