Why are BOV's bad

[GTPowered4.6l]

I am totally new to turbos. I currently have a NA 99 mustang cobra but am kinda in the market for a suby. I see all kinds of threads about how BOV's are a no no when looking to buy a suby. Why is that. Dont subies have some sort of stock BOV or something. Also if they are so bad while I was at the meet this weekend in Martinsburg, WV just about every car I saw had one. Please correct me if I am wrong but isnt a BOV what makes the noise in between shifts Maybe I should just stick with Ford's

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[bjwk89]

i'm a newb so don't go by me, but from what i've read, a stock subaru has a bpv, it takes the air and recirculates it back into the car
it if perfect for the car up to like 22psi, more than a stocker can put out
a BOV spits the air into the atmosphere making the pssshhhtt sound
your airflow sensor already read the air amount, but now that air is gone
so it compensates with fuel or something, so your engine gets too much gas
or runs "rich", causing bogging down and rough idles
also you lose power during shifts
i guess they have a purpose for like cars running extreme amounts of boost, but yeah they just sound cool
most cars do not need them, and in fact it will be bad
a lot of people just like that sound, it's very showy



like i said though don't go totally by me, if i said something wrong someone please correct me or throw in your 2 cents too, this is just my knowledge from living on this site for the past few weeks

[GTPowered4.6l]

Nevermind I just read the manifesto. I read all of the others but for some reason didnt read his. Awesome information. So even the stock BPV will make the psssst noise I thought the stock ones were quiet and everyone who had loud ones had an aftermarket bov

[Dramabomb]

Originally Posted by GTPowered4.6l

Maybe I should just stick with Ford's

http://forums.nasioc.com/forums/show...hreadid=468038

Edit: Beaten like a mixed-race stepchild!

Yeah, our stock BPV's are pretty loud if you do the silencer delete or some kind of intake.

[GTPowered4.6l]

Originally Posted by bjwk89

i'm a newb so don't go by me, but from what i've read, a stock subaru has a bpv, it takes the air and recirculates it back into the car
it if perfect for the car up to like 22psi, more than a stocker can put out
a BOV spits the air into the atmosphere making the pssshhhtt sound
your airflow sensor already read the air amount, but now that air is gone
so it compensates with fuel or something, so your engine gets too much gas
or runs "rich", causing bogging down and rough idles
also you lose power during shifts
i guess they have a purpose for like cars running extreme amounts of boost, but yeah they just sound cool
most cars do not need them, and in fact it will be bad
a lot of people just like that sound, it's very showy



like i said though don't go totally by me, if i said something wrong someone please correct me or throw in your 2 cents too, this is just my knowledge from living on this site for the past few weeks

You said exactly what is in the sticky. Thanks man. I had no idea they were for just sound. Now when I ride by all the fuggn tools in my cobra that make their car go pssst I can reach out and smack em in the face. I hate that and they always seem to have it timed when I am right beside them.

[GTPowered4.6l]

Originally Posted by Dramabomb

http://forums.nasioc.com/forums/show...hreadid=468038

Edit: Beaten like a mixed-race stepchild!

Yeah, our stock BPV's are pretty loud if you do the silencer delete or some kind of intake.

Someone also said not to buy a car with an intake either....

[-Kevlar-]

Originally Posted by GTPowered4.6l

Someone also said not to buy a car with an intake either....

depends on the car and the intake and 100 other factors (ie front mount w/ em)....

[bjwk89]

again, most of my words quote what i can remember in the manifesto

but it messes with the airflow sensor
some intakes do help
but without a tune it can screw the car up
i saw "don't get one"
so i just didn't read up on them yet since i doubt i will be getting one any time soon

but what would you rather?
a slow boggy car that makes noise (not saying there aren't fast cars with bov's)
or a fast car that performs awesomely?
i'd leave the stock one alone

i never heard a stock bpv with the silencer delete though
i'll have to get around to that..

[Dramabomb]

Originally Posted by GTPowered4.6l

Someone also said not to buy a car with an intake either....

That's up for debate. I wouldn't buy a modded car period. Doesn't matter what mods were done. However, that's my own personal opinion. Read the Intake FAQ and decide if that's a road you want to go down.

If you're in the market to buy a used Subaru, in my opinion, try to find one that is stock.

[bjwk89]

^^^sorry didn't even read that you were looking to buy one,
never buy modded
it probably means a dumb 16 year old tried to race it, and beat the balls off of it
if you plan on working on it, buy a stock one

and what i now learned today, try and check if the cd player was changed, like mine after market wiring was left in, so mine might be a modded car owned by a dumb teen returned to stock
can't see any damage though so i lucked out
i know the cd player doesn't mean it was modded, but i doubt a 29 year old guy would change the cd player and screw things up with mods
however a 17 year old would "want a sikkk system dewddd"
and do crap mods along with that

[GTPowered4.6l]

I am currently looking at this one. I am going to make them an offer I think...
http://www.autotrader.com/fyc/vdp.js...000&cardist=21

[Dramabomb]

Looks clean! I haven't seen those wheels in forever.

[bjwk89]

very pretty car, nice find
too expensive though
talk them down
you can get an 04 MAYBE an 05 for that price
talk them down, looks decent though

[bjwk89]

and my eyes are bad, night driving with contacts then coming home and looking at a computer screen, bleck
but is that a short shifter? i can't tell, looks like a different knob atleast
look into that to see if it was modded

[i_c_the_light]

Well what I have found is the answer depends on what part of the world you live in. In the US they are deemed to be bad for the engine. Having that rich condition and the afterfire that occassionally comes with it is seen as something harmful to the engine. That all started with the WRX when it was discovered that the cat in the up pipe was in danger of disintergrating and getting eaten up and damaging the turbocharger.

However in New Zealand and Australia, they aren't deemed to be bad for the engine at all. The whistle sounds cool and the afterfire pops, bangs and the odd flame are considered just downright awesome. Also neither countries got cats in their up pipes and there was no danger of turbocharger failure. That and folks have been running atmospheric valves in their turbo Subies for ages with no problems caused by them.

Now with my own personal opinion here. I used to be pro BPV for ages till I found out that they all leak. Hook one up so it vents out like an aftermarket atmospheric valve. I gave it a go to see if they really do hold pressure. The issues I was getting was similar to having an atmospheric valve with a really loose spring and poor seal. The idle was crap and I was shocked to discover that when I put my thumb over it completely the idle returned to normal and when I gave the engine a bit of a burp while I had lifted my thumb off it a bit I could feel air coming out when it shouldn't be venting.

I tried that on a couple of other factory valves that I liberated off other Subies and all behaved the same. Now I don't know if that's the case on all of the older factory valves and I don't know if they properly seal when manifold pressure goes out of vacuum and forces the valve to close properly, but I do know that they leak at idle.

[GeoffSFAs10]

Originally Posted by Dramabomb

http://forums.nasioc.com/forums/show...hreadid=468038

Edit: Beaten like a mixed-race stepchild!

Yeah, our stock BPV's are pretty loud if you do the silencer delete or some kind of intake.

my stock BOV makes all sorts of noise with the silencer gone. i love it

[Snig]

Just make the jump to a Terminator Cobra.

[ahendrickson]

Originally Posted by bjwk89

^^^sorry didn't even read that you were looking to buy one,
never buy modded
it probably means a dumb 16 year old tried to race it, and beat the balls off of it
if you plan on working on it, buy a stock one

and what i now learned today, try and check if the cd player was changed, like mine after market wiring was left in, so mine might be a modded car owned by a dumb teen returned to stock
can't see any damage though so i lucked out
i know the cd player doesn't mean it was modded, but i doubt a 29 year old guy would change the cd player and screw things up with mods
however a 17 year old would "want a sikkk system dewddd"
and do crap mods along with that

You can not just put all teenagers into that catagory. I am 17, and from the comments that you are making, I know that I know more about cars than you. I have grown up around cars and I hvae taught my self alot about them to. Sure I have a modded car, but at least I am taking all the proper percautions. I am not just throwing random parts on. I am doing all the research first, and preparing my car for the mods, such as EM. As for the racing. Not all teenagers are into racing. Aside from the track, I am against it. I think street racing is stupid and pointless, a way for people with no self esteem to feel better about them selves.

[subeerex]

GFB StealthFX does the best of "both" worlds... only if money is not an issue here
The main issue is always: "Why spend so much $$ on something that replaces something else that's perfectly good for the purpose"!
In other words...the stocker is just right for our cars...you DO NOT NEED an after-market one (BOV).
But, there are some like the GFB StealthFX that does both. It can function as your after-market (BOV) one or it can be closed to function as good or better (heavily debated ) as the stock BPV.
Again, money is the only issue here, being that your car already came equipped with a "fine" and functional one...someone would ask: "Why spend the "unnecessary" money on a BOV.
My personal answer...cause you can and sometimes man wanna be boys again
So, my advice is that if you're gonna get one, make sure you're able to afford a good one that gives you this flexibillity of "blowing-off" when you wanna "play" and close it (as stock) when business must be handled .
I personally like GFB for its reliabillity and more or less "decent" pricing.
..and OH!...lets make one thing clear.....there are no power gains in a BOV but "arguably" a better feel...mainly mental

[bjwk89]

ahendrickson
chill out, i'm only 18 myself
it's statistics buddy, it's why we get laughed at when we go into dealerships and say "let me test drive that porsche"
i just agree MOST teens are dumb, i wasn't trying to single anyone out or anything, sorry if i offended you, but like i said, i'm also still a teenager, mommy and daddy didn't buy my car, but i'm still super young for this car

if i was someone else, i'd be hesitant to even buy a car off of me, even though i baby the crap out of my wrx, it is still the hesitation of a young driver driving a fast car

but another way to look at it is, if a 16 year old has a car, unless he works in a sweat shop or 7 days a week, chances are he won't be able to afford it himself, and his parents got him the car
i work at a casino which pays me pretty well for being in highschool, so i pay for all my crap
but say a 25-30 year old, they probably don't have mommy and daddy paying the bills, so might be more responsible with the car since they need to pay for everything
i know if my parents bought me a sweet car i wouldn't take as good care of it
i wouldn't do stupid stuff, but things like oil changes, brake pads, and routine maintenance don't take the front seat anymore, with my own car i'm like "crap! i need an oil change in 2,000 miles!"
i'm a "buy it myself, appreciate more" type of person though, not saying ALL kids would treat a car poorly if given to them

but chill out, i wasn't trying to offend anyone

[ahendrickson]

i actually afforded my car myself. It is in my moms name, for financing and credit reasons, but I put a 10g down payment on it, an im making every payment left on it. I still have 7g in the bank for payments, with a steady job, especially in the summer.
BTW, sorry I flipped, lol. I just though you were bad mouthing kids who do madzzzz street racing. lol

[mugenXP]

my parents and siblings helped me with the down payment on my car... 6 grand total, and my sister pays for my insurance.

but i am a pretty considerate person... i could have easily gotten the sti and have my sister pay for the crazy insurance, and they would have helped me more with the downpayment, which means i would end up paying the same monthly payments whether i chose the sti or the wrx, but i settled with the wrx. and i probably take care of my car more than people who pay it for themself in full, so what most of you guys are saying is bull**** jealousy.

i got the car when i was 18.. now im 19

whoops, off topic.

[ahendrickson]

nice. why does your sister pay for ur insurance??

[mugenXP]

shes the oldest and shes making pretty good $$ so she just wanted to help me out since i'm still in school, its about $100 a month to insure me lol. i coulda gotten the sti and left her with $200 a month, but i'm not some *** child

[GetFamiliar82]

I bought my car Heavily modded and it has a Worx BOV after some extensive research on it many seem to hold it up to be one of the best BOV's for the STi.
If any one has any jewels to drop on this particular brand of BOV please do so.


Also what gives that Blow Off Whipple in some cars??? Is it the BOV and (even though its just for the coolness value) how can I get my car to have that Blow Off whipple and not just the heavy Woosh that I get now????