Guest Anonymous Posted April 18, 2002 Share Posted April 18, 2002 I HAD a type H BOV that dischaged into the atmosphere. It caused alot of problems. I am switching my BOV to a NEW TurboXS Type H34 BOV that I can vent back into my intake. I was told that this is how I have to do it to avoid the problems I was having with the other BOV. My question is for those who have done this. How did you plumb a line into the suction hose (intake)? I am hesitant to cut into that hose. Did any of you "T" into the crank case ventilation hose that goes from the crank case to the suction hose? The instructions I have state that I have to plumb the BOV discharge back into the intake AFTER the AFM and before the Turbo. It would seem that a "T" into the crank case vent hose might work, but I think I should get some other opinions before I do that. Any suggestions would be greatly appreciated. Thanks, Chas Ryan Quote Link to comment Share on other sites More sharing options...
DAW Posted April 18, 2002 Share Posted April 18, 2002 The PCV system vent hose looks like a good location for the BOV discharge to go, although I think placing the tee closer to the large hose (turbo intake) end rather than the valve cover end might be best. DAW Quote Link to comment Share on other sites More sharing options...
Cody 82 ZXT Posted April 19, 2002 Share Posted April 19, 2002 You would definately want the air to sent back into the intake track rather than into the valve cover. I would fashion a "T" out of some piping maybe out of the plumbers section of Home Depot if your cheap. Also if you could a one way valve would be nice. Quote Link to comment Share on other sites More sharing options...
awd92gsx Posted April 19, 2002 Share Posted April 19, 2002 What is your AFM -> Turbo intake made out of? aluminum, rubber? Do you have any semi closeup pics of it? If the room is there, I may have a suggestion on how to build your own intake for it out of parts available at your local Home Depot for pretty cheap (under $20) that will allow you to get higher flow and dump back into the intake without cutting up any of your stock tubing... Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 19, 2002 Share Posted April 19, 2002 and i learned you definitely need a one-way valve on the valve cover house. the air blew back in and pushed the gasket out a little Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 21, 2002 Share Posted April 21, 2002 What do you mean by you need a one way valve for your valve cover housing? I use a little air filter thing where the hose use to come off of my valve cover to my turbo intake tube. I use the place where the hose came from the intake tube for my BOV discharge. Is there a reason I shouldnt do this? Quote Link to comment Share on other sites More sharing options...
DAW Posted April 21, 2002 Share Posted April 21, 2002 You're letting in unmetered air by creating a new air intake into the PCV system (valve cover). I guess this ultimately lead to an overly lean conditon. If you tee-in to the PCV hose, do it very close to the air intake large hose rather than near the valve cover to prevent spikes in crankcase pressure so that the BOV is dumping into a larger volume of air. DAW Quote Link to comment Share on other sites More sharing options...
Len Posted April 21, 2002 Share Posted April 21, 2002 waytofast I also placed a K&N valve cover breather filter; Where the old (valve cover to AFM)hose connected to valve cover. When I complete installation of my I/C & BOV I plan to run directly from BOV exaust into my AFM hose where valve cover breather hose used to run. Hopefully it should work OK. Now if you you were just going to splice into the hose using a "T" then I would think a one way valve from T to valve cover would be a good idea so you won't get BOV press into crankcase when the BOV blow's Quote Link to comment Share on other sites More sharing options...
DAW Posted April 21, 2002 Share Posted April 21, 2002 A "Y" fitting aiming at the air intake hose and close to it would be better than a "T" fitting. DAW Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 21, 2002 Share Posted April 21, 2002 dont only reason i dont want to use a filter on the valve cover instead of the breather hose is that im creating a vacuum in the system and my car idles alot higher. Keep in mind that the engine was designed to run on a CLOSED vacuum system. I'm sure that if i go with an SDS or any other aftermarket system i can use a BOV and discharge into the air plus and not worry about a closed vacuum system Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 21, 2002 Share Posted April 21, 2002 almost forgot.....DAW youre right. a y fitting would be best. it just dawned on me now that with a T fitting the air would go right into the valve cover. Thanks Quote Link to comment Share on other sites More sharing options...
awd92gsx Posted April 22, 2002 Share Posted April 22, 2002 Jeff, Did you look and see if there's enough room there for another style of intake? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 22, 2002 Share Posted April 22, 2002 it can be done. i want to build one to change the angle so it sits lower. i took some video with my digital camera today at a z meet in north jersey. we had guys from NY and CT there nice turnout. so i'll try to extract some of the frames from my video tomorrow. Quote Link to comment Share on other sites More sharing options...
DAW Posted April 22, 2002 Share Posted April 22, 2002 Jeff, there are probably plenty of sources for "Y" fittings, but one I noticed that would work well is the heater hose metal "Y" from a '73 240Z. It is about a 5/8" tube about 5" long with a 1/2" tube feeding into the other in a "Y" configuration. Use the larger, straight section to vent BOV into large air intake hose, and connect the PCV intake hose to the smaller tube and aiming toward the large air intake hose. This should do it. A check-valve effect is created both by the difference in hose diameters (BOV vs PCV) and the direction of the "Y". DAW Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.