Do Blow OFF Valves add horsepower/boost??

[mckraut]

The factory valve leaks. With our valve the leak is eliminated. The hesitation is caused by one of two things: fuel-cut due to MAP values or inadequate flow from the OEM fuel pump. Going back to stock doesn't fix the problem, it just masks the issue with another problem. Which is a loss of boost through the OEM valve. Which costs you power and reduces the life of your turbo and can increase intake temps which can in turn lead to detonation or timing being pulled which cean lead to higher EGTs which can warp valve seats an kill cats...

...which leads to baldness and loss of sexual appetite...

 

[Powerslave]

if you want to see it as that, but really none is being added, it was already there just not being used to the fullest potential. what i was trying to say was that if you put on a BOV you wont suddenly spike to 17 or 18 psi for no reason, you'll just hold that original 15.6 psi better. this is with no mods i am talking about just the bov.

the boost was there but not the horsepower, so by retaining boost in affect you are adding horespower that was not there...the potential for horsepower was there.. thats heresay not horsepower...

 

[staples187]

The stock valves are leaking. I gained psi by installing and tuning mine. Here's the link to driver's test of his:
Stock Valve Leak Test

In a way it does make sense but I thought the reason that you wouldn't be getting the full amount of boost at WOT would be because of the stock intercooler not pulling in enough air for the turbo. I guess in the long run it could end up being a little bit of both. Lack of air means lack of boost obviously, but having a plastic BOV couldn't help either I'm sure lol. How does everyone like their Forge because that's what I'm looking at going with?

 

[SuperStretch18]

I love my forge valve! Do a search and you will find some sound clips posted by others. I like the metalic sound it makes, but I've heard of others not liking it...

 

[Kosh]

The factory valve leaks. With our valve the leak is eliminated. The hesitation is caused by one of two things: fuel-cut due to MAP values or inadequate flow from the OEM fuel pump. Going back to stock doesn't fix the problem, it just masks the issue with another problem. Which is a loss of boost through the OEM valve. Which costs you power and reduces the life of your turbo and can increase intake temps which can in turn lead to detonation or timing being pulled which cean lead to higher EGTs which can warp valve seats an kill cats...

All of them leak? How many have been tested?

If that is the case I have to bring my car into Mazda since I can't add a BOV in my autocross class.

 

[winniep]

Wow, our EGT can get so high it will actually kill cats?

 

[patty AT forge]

Wow, our EGT can get so high it will actually kill cats?

Not the meow kind (headshake. Catalytic converters don't like retarded timing.

 

[patty AT forge]

All of them leak? How many have been tested?

If that is the case I have to bring my car into Mazda since I can't add a BOV in my autocross class.

Not at all or does the valve have to be submitted for approval first?

 

[AutoXRacer]

All of them leak? How many have been tested?

If that is the case I have to bring my car into Mazda since I can't add a BOV in my autocross class.

I think you can upgrade your BPV for a stock like...Forge.
But if you go with VTA for something totally different, then yeah, you're out of your class...

 

[Powerslave]

with vta you get all coooooold air= more power

 

[SuperStretch18]

the difference is negligible and those without the standback are going to run rich, which will negate the minor difference in temperature...

 

[Kosh]

Not at all or does the valve have to be submitted for approval first?

You can only have an aftermarket bov/bpv in street modified or beyond street modified. I'm in STU.

Since the rules don't say anything about replacing one bpv with another bpv it isn't allowed.

 

[Powerslave]

the difference is negligible and those without the standback are going to run rich, which will negate the minor difference in temperature...

but from what i understand the richness is ONLY between shifts, and there is a diff for sure not neglibe I can tell im getting cold boost it cuases wiplash..lol but yeah if you don't have the standback its probably not the chioce cuase you will run to rich between shifts and cuase bam out the tailpipe(second)

 

[riccitelli]

yea they do hold more boost. you can feel it in the higher rpm range. i went with the turbosmart dual port bov because it recirculate's and also vents into the atomosphere depending on how hard your driving it