Notices
944 Turbo and Turbo-S Forum 1982-1991
Sponsored by:
Sponsored by: Clore Automotive

Blow Off Valves

Thread Tools
 
Search this Thread
 
Old 04-13-2004 | 08:25 AM
  #1  
hosrom_951's Avatar
hosrom_951
Thread Starter
UAE Rennlist Ambassador
Rennlist Member
 
Joined: Jan 2004
Posts: 9,142
Likes: 3
From: UAE & Germany
Exclamation Blow Off Valves

My blow off valve is bad. Tested it and it holds no sucking pressure at all. Need a new one, i saw upgrades (lindsey, SFR, Billet) but i want a LOUD one one that goes PISSSSSSSSSSSSSSSSSST when you shift or hit the gas, but price should be REASONABLE as well...........anyone here got an upgraded one and has comments?
Old 04-13-2004 | 08:44 AM
  #2  
awilson40's Avatar
awilson40
Three Wheelin'
 
Joined: Jun 2001
Posts: 1,688
Likes: 0
From: Winterville, NC
Default

I have one that I tried just for the fun of it. I got tired of it after a week. I guess I'm just getting too old for that stuff.
Its a small adjustable billet unit along with a plug I made for the other connection on the 'J' boot.
It worked fine, idled fine and I noticed no richness between shifts.
Old 04-13-2004 | 09:18 AM
  #3  
Matt H's Avatar
Matt H
Race Director
 
Joined: Jul 2003
Posts: 15,712
Likes: 3
Default

Your DV is bad and you want to replace it with a BOV. Hell, maybe I am getting too old too but they sound obnoxious as can be.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
Old 04-13-2004 | 09:30 AM
  #4  
schadenfreude's Avatar
schadenfreude
Instructor
 
Joined: Jan 2004
Posts: 201
Likes: 0
From: Brisbane, Australia
Default

Don't worry, I'm not old and I hate the loud ones too... that and I can't stand hearing boosted air go to waste
Old 04-13-2004 | 10:08 AM
  #5  
awilson40's Avatar
awilson40
Three Wheelin'
 
Joined: Jun 2001
Posts: 1,688
Likes: 0
From: Winterville, NC
Default

It sounded cool the first day, but then It got on my nerves.
Old 04-13-2004 | 11:25 AM
  #6  
alpenweissisnice's Avatar
alpenweissisnice
Addict
Rennlist Member

 
Joined: Dec 2002
Posts: 829
Likes: 0
From: Lexington, KY
Default

Originally posted by schadenfreude
Don't worry, I'm not old and I hate the loud ones too... that and I can't stand hearing boosted air go to waste
I agree - I don't understand why folks want to hear the vent to the atmosphere, when you could be sending already pressurized air BACK into the system to be RE- pressurized...?

Not bashing - if you want to hear the "PSSSShhhtttt" sound, more power (actually LESS power) to ya!

Old 04-13-2004 | 11:28 AM
  #7  
slim_boy_fat's Avatar
slim_boy_fat
Racer
 
Joined: Jan 2004
Posts: 489
Likes: 0
From: Scotland
Default

RICE......
Old 04-13-2004 | 11:35 AM
  #8  
dme's Avatar
dme
Addict
Rennlist Member

 
Joined: Mar 2004
Posts: 1,238
Likes: 11
From: Grapevine, Texas
Default

Mine's not Pssshhting it is Cha cha Chaaaing. I guess I better check it out.
Old 04-13-2004 | 02:39 PM
  #9  
v944god's Avatar
v944god
Addict
Rennlist Member
 
Joined: May 2003
Posts: 1,865
Likes: 0
From: Northern NJ
Default

But girls throw their panties at your car when they hear it!

I have a BOV that vents to atmosphere in my TII, 30 minute install, I can adjust it between soft-hard, but I haven't had any complaints. People usually like the sound.
Old 04-13-2004 | 02:41 PM
  #10  
PCinDC's Avatar
PCinDC
Rennlist Lifetime Member
Lifetime Rennlist
Member
 
Joined: Jul 2002
Posts: 2,130
Likes: 0
From: Northern Virginia
Default

Does anyone know if its possible to recirculate the charge air from a Turbonetics Godzilla? To the original poster - if you want loud, get one of these. You'll need custom intercooler pipes for most any aftermarket BOV also.

Is there a noticeable difference in power between venting and recirculating?

If I understand it correctly, the BOV will only vent between shifts, causing a momentarily rich scenario when there wouldn't be power going to the ground anyway. Does the BOV's pressurized air help to keep the compressor wheel spinning?

If so, is the lost performance mostly realized through a bit more turbo lag after shifting? If not, then can you explain how it hurts power output? Ive read up on BOV's and I'm still not finding the information I'm looking for.

And please if someone knows if you can recircualte from a Godzilla and knows how, please let me know.
Old 04-13-2004 | 02:50 PM
  #11  
David Floyd's Avatar
David Floyd
Addict
Rennlist Member

 
Joined: May 2001
Posts: 7,109
Likes: 4
From: Tennessee
Default

Originally posted by 944 Fanatic
Does anyone know if its possible to recirculate the charge air from a Turbonetics Godzilla? To the original poster - if you want loud, get one of these. You'll need custom intercooler pipes for most any aftermarket BOV also.
I have a Godzilla and recirculate, makes a nice sound between shifts on boost.
Old 04-13-2004 | 02:55 PM
  #12  
cpt_koolbeenz's Avatar
cpt_koolbeenz
Drifting
 
Joined: Jul 2003
Posts: 2,163
Likes: 0
From: Golden, CO
Default

<<<Is there a noticeable difference in power between venting and recirculating?>>>

If so, it is in your head...
If you have a stock intake, it is possible that it would help a tiny bit...
If you have a MAF or MAP it will not help at all. If you have the throttle shut, the excess air is not going to go into the intake, it will be pushed out the air filter (assuming a MAF or MAP).
If you like it, go for it. I have the stock DV valve going to the ATM. It sounds nice! I also have a HKS SSQV but haven't played with it much.
Old 04-13-2004 | 04:10 PM
  #13  
alpenweissisnice's Avatar
alpenweissisnice
Addict
Rennlist Member

 
Joined: Dec 2002
Posts: 829
Likes: 0
From: Lexington, KY
Default

Originally posted by v944god
But girls throw their panties at your car when they hear it!
So THAT'S why girls don't throw panties at my car! I thought it was because I'm an old man with that special "restraining order" look about him...
Old 04-13-2004 | 04:14 PM
  #14  
MM951's Avatar
MM951
Race Director
 
Joined: Aug 2001
Posts: 10,607
Likes: 49
From: Hudson Valley
Default

BOVs will save your turbo...

On my quest before the BOV it would make the "turkey gobble" (thats the compressor stalling) and slow you down between shifts, as it would have to boost up again. When the BOV is on, the compressor WONT stall and you will run rich for a second but its all during the shift..
Old 04-13-2004 | 04:43 PM
  #15  
v944god's Avatar
v944god
Addict
Rennlist Member
 
Joined: May 2003
Posts: 1,865
Likes: 0
From: Northern NJ
Default

Originally posted by alpenweissisnice
So THAT'S why girls don't throw panties at my car! I thought it was because I'm an old man with that special "restraining order" look about him...
Well chics dig older guys with nice cars so I think your fine.


Quick Reply: Blow Off Valves



All times are GMT -3. The time now is 07:05 PM.