Recirculating or Venting a BOV

[Sr20detNESS]

What do I want?...a recirculated or vented BOV. I've heard thats my choice but can anybody tell me whats the difference and your personal choice. And can you tell me also how they both hook up, maybe show some pictures. And also what would cause a car to stall out at high RPM's? thank guys

[9240sx]

recirculated

[IanS]

For you recirc is most likly the way to go, if you vent to atmosphere your letting air out of the intake tract, but your MAFS thinks that air is still going into the engine, and it dumps fuel in accordingly, causing the car to backfire upon shifting and let off, this makes smooth shifting dificult and will often cause the car stutter when dropped to idle, also if your trying to use a leaky egay BOV it can make the car buck at high RPMS. The only way to get around these issues, is to either recirculate the air back to the intake tract after the MAFS but befor the Turbo, or get a ECU retune of fuel computer that allows for atmosphereic venting. Ive never heard of not recircing on Nissans being harmful, mine was for awhile, but for other cars can have seriose issuses cause by the false MAFS signal.

[BGdude]

Its funny, I have a Blitz DD BOV that is venting and never had any issues with stalling nor has it given any signs of it. I dont know why is that, I've heard others having problem though....

[Drty_Jrze]

No question, recirculate. Venting is for posers...

[creophus]

Its funny, I have a Blitz DD BOV that is venting and never had any issues with stalling nor has it given any signs of it. I dont know why is that, I've heard others having problem though....

Do you have AC and powersteering? I have the same BOV and never had a problem until my powersteering was hooked up. I have an S14SR in an S14 chasis.

I recommend recirc.

[BGdude]

Yes, A/C and powersteering is hooked up. It doesnt matter if normal driving or full boost, knock on wood no problems with the idle.

[starkos14]

ive got the blitz dd BOV and its vented, i love it! no problems. i do backfire though...... i dont really mind the backFIRE out the exhaust though... the flames give it a nice element

[Beemen550]

i have a blitz ss, i just recently recirculated it and i personally think it runs worse recirculated, not sure if its just my car, but i took the hose off and im back to venting it, never had any problems of stuttering either way so i guess its fine how it is