300ZX (Z32) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. performance enhancements and Techical related.

BLOW OFF VALVE question

Thread Tools
 
Search this Thread
 
Old 03-01-2005, 10:01 AM
  #1  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
BLOW OFF VALVE question

Im looking at getting a set of Blow off valves. My question to all you guys is will say a set of HKS ssqv BOVS using stock turbos affect the performance of my car. Will it give my car a rough idle. I have a 93 TT apexi intake, Brullen stainless steel exhaust, JWT ECU, Stainless Steel downPipes and a RPS SPort Clutch. Also which BOV would you guys recommend. Thanks in Advance
1SIKZ is offline  
Old 03-01-2005, 12:02 PM
  #2  
Aqua Teen Hunger Force Fan
 
ZXDude90's Avatar
 
Join Date: Sep 2004
Location: Smyrna, TN
Posts: 535
I have the HKS installed but havn't driven the car yet because it's still tore down.
ZXDude90 is offline  
Old 03-01-2005, 01:05 PM
  #3  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
Where did you mount the HKS BOVS?? Is that the stock location for the recirc lines?
1SIKZ is offline  
Old 03-01-2005, 01:18 PM
  #4  
S13 or Z32?....decisions, decisions.
 
RPS13_GZ32's Avatar
 
Join Date: Feb 2005
Location: Reno, Nevada
Posts: 892
Yea, i was kinda wondering that myself, how does that model bolt up?
RPS13_GZ32 is offline  
Old 03-01-2005, 06:29 PM
  #5  
Registered User
 
91zxtt's Avatar
 
Join Date: Nov 2003
Location: Gerber, CA
Posts: 3,672
Yes, it's the stock recirc location. It's supposed to be a direct bolt on with the Z32 kit. No, it shouldn't cause a rough idle. Why do you want BOV's? How much boost are you running?
91zxtt is offline  
Old 03-02-2005, 05:09 AM
  #6  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
Well i am planning to put a boost controller in soon but im still running stock turbos so at that point anywhere from 12-14 psi. Will the Bov make a difference at that PSI?
1SIKZ is offline  
Old 03-03-2005, 08:17 AM
  #7  
Registered User
 
LUKassZ's Avatar
 
Join Date: Feb 2005
Posts: 47
Originally Posted by 1SIKZ
. Will the Bov make a difference at that PSI?
will it make a difference??? What exactly do you mean? BOV's don't add power or performance. Actually having a MAF, the stock recirc valves are more efficient, but your engine will run fine with blow off valves. Unless you are pushing crazy amounts of boost/power there is no need for them. They are pretty much for show/sound, granted some people get them just to get rid of the infamous goose honk the stock recirc's make.

As far as quality, HKS super sequential are regarded as the best, RFL's the loudest...
LUKassZ is offline  
Old 03-03-2005, 08:24 AM
  #8  
Banned
 
00Evan's Avatar
 
Join Date: Jun 2002
Posts: 143
BOVs do add performance, an aftermarket blow off valve can help hold boost between shifts.
00Evan is offline  
Old 03-03-2005, 09:26 AM
  #9  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
oK the blow off valve goes off when shifting gears and releasing the throttle , right??? Meaning that it blows off the air into the atmosphere, right after you shift, your engine will run rough won't it cause ur computer reads the mass airflow sensor at your intake and correspods with the proper amount of fuel. And the way every ricer does it, they drive hard, shift gears, hears the BOV go off and coasts.. NOT Smart..

WOULDN'T IT BE SMART TO MOVE THE AIRFLOW SENSOR AFTER THE BLOWOFF VALVES THAT WAY YOU CAN BLOW ALL YOU WANT AND YOUR ENGINE WILL ALWAYS RUN THE SAME.

Last edited by 1SIKZ; 03-03-2005 at 09:29 AM.
1SIKZ is offline  
Old 03-03-2005, 10:50 AM
  #10  
turtled user
 
turtleboy's Avatar
 
Join Date: Feb 2005
Location: Santa Barbara, California
Posts: 41
Originally Posted by 00Evan
BOVs do add performance, an aftermarket blow off valve can help hold boost between shifts.
What are you talking about?

If they are doing their jobs they should be doing the exact opposite.
turtleboy is offline  
Old 03-03-2005, 10:51 AM
  #11  
turtled user
 
turtleboy's Avatar
 
Join Date: Feb 2005
Location: Santa Barbara, California
Posts: 41
Originally Posted by 1SIKZ
WOULDN'T IT BE SMART TO MOVE THE AIRFLOW SENSOR AFTER THE BLOWOFF VALVES THAT WAY YOU CAN BLOW ALL YOU WANT AND YOUR ENGINE WILL ALWAYS RUN THE SAME.
You have no idea what the intake plumbing in your car looks like do you?

To answer your question, no. Stick with recircs.
turtleboy is offline  
Old 03-03-2005, 11:18 AM
  #12  
Jack Of All Trades
 
CanyonCarver's Avatar
 
Join Date: Jun 2004
Location: Acton, California
Posts: 2,296
Originally Posted by 1SIKZ
....computer reads the mass airflow sensor at your intake and correspods with the proper amount of fuel.
Ideally you dump the maf and go with a map setup like hondas have. But then you'd need a different ecu too.
CanyonCarver is offline  
Old 03-03-2005, 12:16 PM
  #13  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
Alrite thanks turtleboy.. i know the intake plumbing but wasn't exactly sure if that would fix that problem or not.
1SIKZ is offline  
Old 03-03-2005, 07:10 PM
  #14  
turtled user
 
turtleboy's Avatar
 
Join Date: Feb 2005
Location: Santa Barbara, California
Posts: 41
Originally Posted by 1SIKZ
Alrite thanks turtleboy.. i know the intake plumbing but wasn't exactly sure if that would fix that problem or not.
It's just the nature of recircs/bovs and maf's and what they do and where they physically are in the intake tract.

To sum the thread up, stick with recircs, unless they start to leak from age or high boost levels, or malfunction.
turtleboy is offline  
Old 05-29-2005, 11:15 AM
  #15  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
Hey guys .. i just couldn't stand those recirc valves honking all the time so i installed a set of HKS SSQV BLOW OFF VALVES.. since then there has been 2 times where it sounded like the engine was running to rich ,, not enogh air.. is there any kits or any way to relocate the mas so that its after the bov and wouldn't i need two ? is there a kit for the Z32???THANKS
1SIKZ is offline  
Old 05-29-2005, 12:24 PM
  #16  
Aqua Teen Hunger Force Fan
 
ZXDude90's Avatar
 
Join Date: Sep 2004
Location: Smyrna, TN
Posts: 535
Originally Posted by 1SIKZ
Hey guys .. i just couldn't stand those recirc valves honking all the time so i installed a set of HKS SSQV BLOW OFF VALVES.. since then there has been 2 times where it sounded like the engine was running to rich ,, not enogh air.. is there any kits or any way to relocate the mas so that its after the bov and wouldn't i need two ? is there a kit for the Z32???THANKS
You can get the BOV recirc kit. I don't know if the honking issue will come back though. http://www.amzperformance.com/z32/?p...26c998d85e037&
ZXDude90 is offline  
Old 05-29-2005, 12:30 PM
  #17  
Registered User
Thread Starter
 
1SIKZ's Avatar
 
Join Date: May 2004
Location: newmarket ontario
Posts: 117
ZXDUDE do u have that problem.... i see all the mods u have done to ur car and they are almost the same as mine?? U have the HKS bovs does it ever run rich at idle??? My mods are HKS intake, hks super dragger exhaust, JWT ecu, greddy turbo timer, HKS SSQV BOV, , Z1 hardpipes kit and hose techniques SVH kit
1SIKZ is offline  
Old 05-29-2005, 12:43 PM
  #18  
Aqua Teen Hunger Force Fan
 
ZXDude90's Avatar
 
Join Date: Sep 2004
Location: Smyrna, TN
Posts: 535
Originally Posted by 1SIKZ
ZXDUDE do u have that problem.... i see all the mods u have done to ur car and they are almost the same as mine?? U have the HKS bovs does it ever run rich at idle??? My mods are HKS intake, hks super dragger exhaust, JWT ecu, greddy turbo timer, HKS SSQV BOV, , Z1 hardpipes kit and hose techniques SVH kit
The car idles funny and the RPMs drop spontaneously until it warms up and then it's fine. However, it was doing this before I installed the BOVs. The bovs shouldn't have an effect at idle. They only open when you shift or let off the throttle.
ZXDude90 is offline  
Old 08-24-2005, 08:15 PM
  #19  
Registered User
 
dropit's Avatar
 
Join Date: Aug 2005
Posts: 3
so i like the sound of a bov r they going to afect the powor of the car or the top end power
dropit is offline  
Old 08-24-2005, 09:30 PM
  #20  
Bad Speller
 
bardabe's Avatar
 
Join Date: Sep 2004
Location: Moreno Valley, CA
Posts: 1,832
have any of you guys ever heard teh Apex Twin Chamber BOV?
bardabe is offline  
Old 08-24-2005, 09:33 PM
  #21  
caught the z fever
 
b300z's Avatar
 
Join Date: Jun 2004
Location: Lafayette, IN
Posts: 2,518
the bovs will only release the air pressure to keep from surging the turbos and make that cool sound
theres nothing performance about them
you will need to replace stock recir valves when you get up to rediculous hp because the stock ones cant handle the pressure
b300z is offline  
Old 08-24-2005, 10:46 PM
  #22  
Administrative Brown Guy
 
Riz Z Speed's Avatar
 
Join Date: Jun 2003
Location: Ontario, Canada
Posts: 5,406
wtf is this thread from the dead crap.

thread closed.
Riz Z Speed is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
zlaxbro
280ZX Performance / Technical
4
12-06-2011 11:59 AM
mikesz
280ZX Performance / Technical
3
08-18-2007 05:13 PM
Blue280zxTurbo
280ZX Performance / Technical
4
10-23-2005 09:40 AM
haktmal
280ZX Performance / Technical
3
04-20-2003 06:59 PM



Quick Reply: BLOW OFF VALVE question



All times are GMT -7. The time now is 11:55 PM.