bov venting - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nick6315 · 08-03-2002, 10:18 PM

does the MAS give you shit when you vent to the atmosphere like on a lot of DSMs? Or do you have to recirculate it?

misnomer · 08-03-2002, 11:04 PM

There is nothing wrong with a BOV venting to the atmosphere. hell, it's even been filtered <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt='

'> if your wastegate vents to the atmosphere, that's bad, but a blow of valve is just fresh air.

xhdriver · 08-04-2002, 01:44 PM

i have a blitz atmosphere bov, and my car was a little smoother after shifts at low speed without it, when im hauling ass i cant even tell the difference.  im pretty sure every car is different though, my car has never died because of it but occaisionally i do get a pretty loud fireball. i have heard of other people having trouble.

uuninja · 08-04-2002, 01:53 PM

With a mass air flow sensor, venting the bov can cause some problems. Basicaly the ecu is expecting to see the air that was vented to the atmosphear, it adds the normal ammount of fuel to match. Meaning that you have a sudden rich contition when off throttle. This is more of a problem with KA-T's. I have known tons of people that vent to the atmosphear with SR and don't have any problems with that.

mazdog240 · 08-04-2002, 02:13 PM

I would say "most" of the people I know with SR's  just vent to the atmos. and don't really have any probs the occasional stumble but that's it.  Also the Apexi S-AFC has a function in it to help with this, although I have heard mixed things about its effectiveness.  
Also vented justs sounds so damn cool, you can scare unsuspecting pedestrians and the dude in the Honda next to you.

And for the record, ALL wastegates vent to the atmosphere they just go through the exhaust system first.  But you can even vent them out withoust going through the exhaust (sounds pretty crazy)

08-03-2002, 11:04 PM	#2
misnomer Nissanaholic! Join Date: Jul 2001 Location: Nevada Posts: 2,293 Trader Rating: (0) Feedback Score: 0 reviews	There is nothing wrong with a BOV venting to the atmosphere. hell, it's even been filtered <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=''> if your wastegate vents to the atmosphere, that's bad, but a blow of valve is just fresh air. __________________ Rowsdower saves us and saves all the world!

08-04-2002, 01:44 PM	#3
xhdriver Zilvia Member Join Date: Jan 2002 Location: 6 Posts: 273 Trader Rating: (0) Feedback Score: 0 reviews	i have a blitz atmosphere bov, and my car was a little smoother after shifts at low speed without it, when im hauling ass i cant even tell the difference.  im pretty sure every car is different though, my car has never died because of it but occaisionally i do get a pretty loud fireball. i have heard of other people having trouble. __________________

08-04-2002, 01:53 PM	#4
uuninja Zilvia Addict Join Date: Dec 2001 Location: Reston, VA Age: 47 Posts: 812 Trader Rating: (0) Feedback Score: 0 reviews	With a mass air flow sensor, venting the bov can cause some problems. Basicaly the ecu is expecting to see the air that was vented to the atmosphear, it adds the normal ammount of fuel to match. Meaning that you have a sudden rich contition when off throttle. This is more of a problem with KA-T's. I have known tons of people that vent to the atmosphear with SR and don't have any problems with that. __________________ Lurker Supreme! www.midatlantic240sx.com 91 Coupe 97 KA24DE+T SOLD

08-03-2002, 10:18 PM	#1
Nick6315 Join Date: Jul 2002 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	does the MAS give you shit when you vent to the atmosphere like on a lot of DSMs? Or do you have to recirculate it?

08-04-2002, 02:13 PM	#5
mazdog240 Leaky Injector Join Date: Jun 2002 Posts: 88 Trader Rating: (0) Feedback Score: 0 reviews	I would say "most" of the people I know with SR's  just vent to the atmos. and don't really have any probs the occasional stumble but that's it.  Also the Apexi S-AFC has a function in it to help with this, although I have heard mixed things about its effectiveness.   Also vented justs sounds so damn cool, you can scare unsuspecting pedestrians and the dude in the Honda next to you. And for the record, ALL wastegates vent to the atmosphere they just go through the exhaust system first.  But you can even vent them out withoust going through the exhaust (sounds pretty crazy)