Blow off valve placement..Does it matter what side of the IC?

Thread Tools
 
Search this Thread
 
Old Jan 25, 2009 | 01:46 PM
  #1  
MidwestAutoWorks's Avatar
Thread Starter
B*a*n*n*e*d
 
Joined: Oct 2006
Posts: 5,784
Likes: 0
From: Midwest, WI
Default Blow off valve placement..Does it matter what side of the IC?

Searched for this discussion but could not find anything.

I use to own the CFT turbo s2000 monster but after having a kid i had to sell it and get something else, I bought another s2000 and I currently have a thread on the build.

I bought the Inline Pro turbo kit, and unlike my other turboed cars, the BOV is on the hotside of the piping versus the cold side.

Is there and issues with it being on this side, I mean obviousy its proven to work since there are 100s of Inline Pro'd S2000s out there, but I just would like to hear more opinions on this setup
Reply
Old Jan 25, 2009 | 02:15 PM
  #2  
awdgsx96's Avatar
Honda-Tech Member
 
Joined: Apr 2006
Posts: 1,267
Likes: 0
From: NJ -> Outside Denver
Default Re: Blow off valve placement..Does it matter what side of the IC?

I've seen this argument before and from what I got it doesn't matter. It's in the forum here somewhere, but it was posted that it might be better since the BOV is letting out air faster since it's closer to the compressor. There was a "disadvantage" but I can't remember what it was.
Reply
Old Jan 25, 2009 | 02:22 PM
  #3  
tegman23's Avatar
Honda-Tech Member
 
Joined: Mar 2007
Posts: 2,848
Likes: 0
From: pa, US
Default Re: Blow off valve placement..Does it matter what side of the IC?

I don't think it matters really as long as the pressure gets released....BTW full race intercoolers have there bov on the end tank on the hot side, and im sure if there doing that its must be fine..
Reply
Old Jan 25, 2009 | 02:43 PM
  #4  
NJIN BUILDR's Avatar
Honda-Tech Member
 
Joined: Mar 2003
Posts: 3,333
Likes: 0
From: Hudson, NH, 03051
Default Re: Blow off valve placement..Does it matter what side of the IC?

There seems to be a couple thoughts on where the "best" place is.In reality I don't think it matters.My decision is based on the cleanest place for the particular setup.
Reply
Old Jan 25, 2009 | 03:17 PM
  #5  
civic-r11's Avatar
Honda-Tech Member
 
Joined: Feb 2005
Posts: 587
Likes: 0
From: From NJ to Ga
Default Re: Blow off valve placement..Does it matter what side of the IC?

Originally Posted by NJIN BUILDR
There seems to be a couple thoughts on where the "best" place is.In reality I don't think it matters.My decision is based on the cleanest place for the particular setup.
I agree with you.
Reply
Old Jan 25, 2009 | 05:32 PM
  #6  
ACTION JACTION's Avatar
Honda-Tech Member
 
Joined: Apr 2008
Posts: 392
Likes: 0
From: Fishtailing in da 6spd
Default Re: Blow off valve placement..Does it matter what side of the IC?

Personally, I would put it on the cold side. You might recover boost a hair faster in between shifts. I dunno, it just seems more efficient to me. In reality, I dont think it matters enough to make a noticeable difference.
Reply
Old Jan 25, 2009 | 06:04 PM
  #7  
MidwestAutoWorks's Avatar
Thread Starter
B*a*n*n*e*d
 
Joined: Oct 2006
Posts: 5,784
Likes: 0
From: Midwest, WI
Default Re: Blow off valve placement..Does it matter what side of the IC?

Sounds good to me, like i said im sure it doesnt matter because 100s of peeps are runnig the IP s2000 kit with this setup and doesnt seem to be an issue
Reply
Old Jan 25, 2009 | 06:04 PM
  #8  
Tony the Tiger's Avatar
Honda-Tech Member
 
Joined: Mar 2000
Posts: 2,859
Likes: 1
From: Toronto, ON, Canada
Default Re: Blow off valve placement..Does it matter what side of the IC?

Actually, putting it on the hot side is more efficient.

Instead of venting colder air which has already passed through the FMIC, you will be venting hot air. This puts less strain on the FMIC, although miminal, it should improve air temps if the FMIC was constantly maxed out.

The other reason is that compressor surge is air pressure kickback between the compressor wheel and throttoebody. The FMIC is a source of restriction, so a BOV on the cold side may not be seeing pressure that is occuring between the turbo and the FMIC.

I noticed on my turbo IS300 that I had this minor surging that I cannot get rid of... Swapped BOV's, changed vac source, line size, etc.. and I noticed even if I physically jam the BOV open, I still get a minor surge. Voila, I moved the BOV to the hotside and the surging was gone. That was enough to make me believe that BOV on the hotside works wonders.
Reply
Old Jan 25, 2009 | 06:14 PM
  #9  
m R g S r's Avatar
Honda-Tech Member
 
Joined: Jun 2003
Posts: 9,555
Likes: 0
From: NYC bitchessss
Default Re: Blow off valve placement..Does it matter what side of the IC?

Twin BOV's FTW :D
Reply
Old Jan 25, 2009 | 06:16 PM
  #10  
MidwestAutoWorks's Avatar
Thread Starter
B*a*n*n*e*d
 
Joined: Oct 2006
Posts: 5,784
Likes: 0
From: Midwest, WI
Default Re: Blow off valve placement..Does it matter what side of the IC?

good info tony!

mrgsr- im not into the ricer look or sound
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
boost4s2k
Honda S2000
11
Jul 27, 2009 07:39 AM
Dollar_bill
Forced Induction
9
Sep 7, 2006 02:56 PM
Beau Gotti
Forced Induction
6
Sep 20, 2005 02:21 PM
J 2000
Honda S2000
25
Jul 29, 2004 07:04 PM
ion_four
Forced Induction
29
Jun 14, 2002 04:25 AM




All times are GMT -8. The time now is 01:33 AM.