At what boost level is a BOV recommended/required?
 

Just as the title says... Is a blowoff valve needed for low boost levels (5-6 psi)? In higher boost applications, will the valve open at any boost > 0psi when you let off the throttle?

Re: At what boost level is a BOV recommended/required?
 

If you MAF is located just before the TB, you can run a BOV at any boost level. You didn't tell us what setup you're running; if it's a SC, most installations have the MAF before the blower and you cannot run a BOV as you'll be venting metered air and screw up your air/fuel ratio. Your bypass valve recirculates unused boost when you close the TB blades.

Re: At what boost level is a BOV recommended/required?
 

I'm still NA at the moment, but thinking ahead... how about for an STS system? Obviously I would need the BOV to be placed before the MAF sensor, but is it really needed with only 5psi of boost?
Claimed "benefits" of a BOV: (please add if I'm missing something)
1- prevent damage to turbo by pressure backsurge
2- maintain turbo rpms between shifts w/ a manual trans
3- make sneezing noise when it blows off

does anyone have any firsthand experience as to whether or not any of these things are pertinent to a low-boost STS system?

Re: At what boost level is a BOV recommended/required?
 

http://www.turbov6camaro.com/BOV.html << good read on how they work

my turbo surges at only 3 psi boost if i don't let off the gas all the way

Re: At what boost level is a BOV recommended/required?
 

EVEN if, or ONLY if you don't let off the gas all the way? Is 3psi your max boost?

Re: At what boost level is a BOV recommended/required?
 

only if, the BOV does not see vac and never opens..... point is its going to surge at any boost level....

my max boost is 17 psi :D :eek:

Re: At what boost level is a BOV recommended/required?
 

Ah ok. So then the question still is whether or not there will be any benefit to having one with boost levels not exceeding 5 psi...? Will I be risking damage to anything (turbo parts, throttle plate...)?

Re: At what boost level is a BOV recommended/required?
 

surge is hard on the turbine over time its wheres it out faster

Re: At what boost level is a BOV recommended/required?
 

IMO any system should have a BOV, some people will say autos dont need them but i disagree.

i think any boost system should have a BOV.... even SC systems

Re: At what boost level is a BOV recommended/required?
 

That's fine, and I respect your opinion... I just prefer to have as much information, quantitative or qualitative, as possible when learning about something. So keep it coming :D

Re: At what boost level is a BOV recommended/required?
 

I guess I still don't understand why you would need a BOV when utilizing a bypass valve.:confused:

Re: At what boost level is a BOV recommended/required?
 

BOV vents into the air

bypass vent it back in front of the maf...... if you vent into the air after the maf the car goes rich and dies

Re: At what boost level is a BOV recommended/required?
 

Simply put... BPV for supercharger and BOV for turbo.

-B

Re: At what boost level is a BOV recommended/required?
 

except in the case of blow-through MAF... Then BOV before MAF. :D