3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.
Sponsored by:

BOV trouble...

Thread Tools
 
Search this Thread
 
Old 12-05-08, 12:20 AM
  #1  
Rotary for life!

Thread Starter
 
rexhvn's Avatar
 
Join Date: Oct 2005
Location: Somewhere...
Posts: 1,155
Received 1 Like on 1 Post
BOV trouble...

Hey guys, sorry to be such a pain... but I need assistance. I've got a turbosmart type 2 (vee port) bov which i've installed on my FD. I welded to my intake piping and putting the boost line on the UIM where the stock one went.

At beginning the pisten in the bov wouldn't open, but I found that the spring was far to big/tight... so I cut it down etc... now the bov is opening fine, but regardless of it's 'hard/soft' settings as it's adjustable... it continues to compression surge... Has anyone had experience with turbosmart bov's? Thanks in advance!

Dennis,
Old 12-05-08, 12:36 AM
  #2  
Brappable.

iTrader: (6)
 
RLaoFD's Avatar
 
Join Date: May 2005
Location: Bay Area
Posts: 1,384
Received 4 Likes on 3 Posts
I'm confused on the position of your bov. Can you specify/ take a picture?
Old 12-05-08, 12:54 AM
  #3  
Rotary for life!

Thread Starter
 
rexhvn's Avatar
 
Join Date: Oct 2005
Location: Somewhere...
Posts: 1,155
Received 1 Like on 1 Post
Picture below! - i've welded it to the bottom intake pipe.

Old 12-05-08, 03:27 AM
  #4  
Brappable.

iTrader: (6)
 
RLaoFD's Avatar
 
Join Date: May 2005
Location: Bay Area
Posts: 1,384
Received 4 Likes on 3 Posts
I think that in the position that its in, if I am understanding the correctly, the BOV is not functioning as it is supposed to.

It is supposed to be welded to a pressurized pipe (one between the turbo and the intake manifold), or connected to a flange inserted into the bypass valve hose near the intakes.

The surge you are hearing is due to pressurized air not going anywhere and causing it to whiplash on the turbos. Change the spot.
Old 12-05-08, 03:36 AM
  #5  
Rotary for life!

Thread Starter
 
rexhvn's Avatar
 
Join Date: Oct 2005
Location: Somewhere...
Posts: 1,155
Received 1 Like on 1 Post
Originally Posted by RLaoFD
I think that in the position that its in, if I am understanding the correctly, the BOV is not functioning as it is supposed to.

It is supposed to be welded to a pressurized pipe (one between the turbo and the intake manifold), or connected to a flange inserted into the bypass valve hose near the intakes.

The surge you are hearing is due to pressurized air not going anywhere and causing it to whiplash on the turbos. Change the spot.
I've seen bov's on the intake pipe on FD's before and they seem to work? I welded a flange to my lower intake pipe... it should work shouldn't it?

Dennis,
Old 12-05-08, 03:57 AM
  #6  
DAMN!Nice

 
Wo:Deep's Avatar
 
Join Date: Jun 2008
Location: Germany
Posts: 403
Likes: 0
Received 2 Likes on 1 Post
Originally Posted by rexhvn
I've seen bov's on the intake pipe on FD's before and they seem to work? I welded a flange to my lower intake pipe... it should work shouldn't it?

Dennis,
When I understand it correctly...
NO .. It won´t work like that.

You Have to weld it on a pipe BEHIND the tuebo. Not Before the turbo.

It seems that you have welded it between Air filter and Turbo inlet.

You have to weld it between turbo outlet and intercooler or between intercooler and intake manifold!!


then it should work!

Good luck!

RE gard
Marc
Old 12-05-08, 04:46 AM
  #7  
Put it in her butt
iTrader: (1)
 
Azcamel's Avatar
 
Join Date: May 2008
Location: Tucson
Posts: 848
Likes: 0
Received 0 Likes on 0 Posts
has to be post turbo, not pre turbo
Old 12-05-08, 06:53 AM
  #8  
Full Member
iTrader: (1)
 
LAXitives288's Avatar
 
Join Date: Jan 2007
Location: stuart, fl
Posts: 125
Likes: 0
Received 0 Likes on 0 Posts
PIMPTIME (Peeing in my pants, tears in my eyes lmfao)
Old 12-05-08, 12:56 PM
  #9  
Bosozoomku
iTrader: (10)
 
TimeMachine's Avatar
 
Join Date: Oct 2008
Location: Seattle, WA
Posts: 632
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by rexhvn
I've seen bov's on the intake pipe on FD's before and they seem to work? I welded a flange to my lower intake pipe... it should work shouldn't it?

Dennis,
No, you're mistaken. There is no pressure in those pipes, they are merely drawing air into the turbos. On your vehicle: The black plastic piping from the turbo to the intercooler, the intercooler, and the black plastic pipe from the intercooler to the throttle body are all pressurized from the turbo, thus that is where to place the pressure release valve, i.e. the "bov."

See http://auto.howstuffworks.com/turbo.htm

Last edited by TimeMachine; 12-05-08 at 12:59 PM.
Old 12-05-08, 01:10 PM
  #10  
rotor toter

iTrader: (8)
 
hella24's Avatar
 
Join Date: Apr 2007
Location: nc
Posts: 111
Likes: 0
Received 0 Likes on 0 Posts
I think you are confused because the bov dumps its air back into the intake on some systems (including the stock one). The bov is plumbed from a pressurized pipe then into an intake pipe. ( or out to the atmosphere on some systems).
Old 12-05-08, 01:57 PM
  #11  
Zoom-ing Goon.

 
180sx-x's Avatar
 
Join Date: Oct 2003
Location: Cape Cod, MA
Posts: 262
Likes: 0
Received 0 Likes on 0 Posts
Question...where is your stock BOV? COV?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Devon300zx
2nd Generation Specific (1986-1992)
3
09-17-15 03:50 PM
zxrazorxz
3rd Generation Specific (1993-2002)
2
09-14-15 07:21 PM



Quick Reply: BOV trouble...



All times are GMT -5. The time now is 12:43 AM.