a good BOV for a stock sequential setup
 

hi guys, as the title says, what's a good BOV on a relatively stock sequential setup? i do believe i am running a stock BOV right now as I can hear the pressure release when driving, but it's very faint and almost inaudible when cruising around town. i've read that BOV's are able to produce a louder sound when they have "horns" or "air splitters". not exactly sure what that means. any suggestions?

the cheapest way is just to remove the pipe connected to the airbox from the stock BOV....youll have the sound you want!

Did you notice the FAQ thread right above this thread? Read it. It has plenty of good info on BOV.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

Yea. It just says that rx7 owners install them and that when installed, makes the same sound as the stock. I was asking on what aftermarket options were available to make it louder

I have a HKS ssqv and the sounds is pretty nice, but very common...

Max

is it much louder than the stock BOV? what difference does it make if it is a common BOV?

There is no reason to upgrade the bov with stock turbos unless you want to make more noise. There is no performance gain.

Before you spend the money, disconnect the stock BOV's from the stock airbox. They make QUITE a bit of noise, actually sound pretty good. They also respond better than many of the BOV's on the market - always smooth.

IMHO, with the stock twins, an aftermarket BOV is a waste of money. The stock ones flow great, make noise, and can handle anything power-wise you want to throw at them.

I would recommend capping the holes in the airbox if you do this long term. Hit up the hardware section in Wal-Mart and get some chair leg caps in black rubber. I think it's either 3/4" or 7/8" size you need - that will fit great.

Dale

agreed.......the stockers sound good

hmm, interesting. well I do believe my stock air box has already been removed when I bought my car (there are dual air intakes in its place right now). where exactly would the BOV be located in relation to these intakes then?

just wondering do the stock twins have 2 BOV's .....cuz i thought ones a blow off and the other a charge relief or something...are they both the same thing?

Here's a post I made in one of the various threads about this topic:
https://www.rx7club.com/showpost.php...4&postcount=11

As for your current setup, can you take a picture? Even some of the aftermarket intakes plumb the BOV outlet back into the intake track to silence the sound.

They are both the "same type of device", but they are used for two different purposes.

Yeah all I have is a cell phone camera but I'll try to take a quick snap shot and post it up here asap, thanks

okay just snapped this now, here's what it looks like:

http://filebox.vt.edu/users/ahoh/mazda/img374.jpg

any takers?

I believe this is the one you want to unhook.

that's just a rubber hose directly connected on. if i disconnect it, won't that have some kind of adverse effect? or is that where the extra sound will come out? i still haven't figured out where the stock BOV is (unless i'm retarded and that's it)

That hose should attach to the BOV a little farther back. The BOV is brown and has a small vacume line on the top. then the hose continues down to the Y-Pipe. There is two of them right by each other. Im not sure which one is the BOV and which one is Charge relief.

If you remove the hoses, make sure to plug the holes on the filter adapter so it wont let air bypass the filter.

The one with the big hose coming off the center of the y-pipe is the main BOV. The other is the charge relief. They have labels but they are sort of interchangeable so I don't rely on that.

Definitely you need the small vacuum line running to the BOV, or else it won't function.

my main goal here is to just make a louder BOV than stock, so if I disconnect that main hose the-k-man pointed out, would that produce a louder sound? is the small vacuum line running to the BOV visible in the above picture?

Unhook the hose K man pointed out back at the stock BOV so you don't have a hose flopping around, and then cap off the hole on the intake, and you are good to go.

What's the point of making a louder noise? Who are you trying to impress? Teenage girls?, Ricers?? Either way, it is a foolish waste of time & money.

It seems to me that your car probably needs a lot of more important things than a stupid loud BOV.

coming from anyone else on this board, i'd probably take that more seriously, but i've seen your posts so i don't really care. it's cool :)

You should disconnect the big hose from the airbox before concluding the stock BOV is wimpy and inaudible.

I mean think about it - how can anyone respect your opinion if you can't take the time to read a manual or diagram and figure out which one is the blow off valve?

That's right, I'm a cranky (cheap) bastard :D

However, I'm usually dead on with my comments/questions. So what is the point of a louder blowoff valve, and who are you trying to impress by making a louder noise?

nobody really but myself i suppose. i'm new to turbos and all, and the stock BOV sound is nice to hear. i was just wondering if there was a method of taking that fun...and increasing it more by making it louder? and i guess i'm just curious and start asking away. i've been drooling over the rx7 for a looong time now and i finally picked one up just a week ago, and of course questions like this are only really discovered when you actually own the car and drive it around day to day.

ideally, i probably should've read the FAQ more carefully. but thanks for the advice, i'll look into disconnecting those hoses from the air filters tonight and see how it sounds.

With an open filter element like that the noise shouldn't change that much. Without increased boost, i do agree that it is a waste of money to upgrade.

im trying to do the opposite,,,, make the bov sound quiter. I cant actually put a small filter on my BOV because then then i get wastegate surge. I was wondering if the ARC blow off vavles sound good/quiter than stocks?

wow... I never thought it would come to this.

whats wrong with the man wanting the sound of the blow off valve, its not a waste of time and money, it doesnt cost shit to do, and take 5 minutes to complete. and by the way... BOV's sound sweet, its just the call sign of a turbocharged car. +1 for louder BOV

the stock BOV is venting while in negative pressure which is most of the time under normal driving. you can hear it ALL the time and it doesnt sound good. makes the car sound broken.

it only sounds good coming out of boost. aftermarket bovs may be different i dont know.

-1 to vented stock BOVs.

my 2 cents!

+1

my stocky is pretty loud, i wouldnt want it louder

The silly thing is that he hasn't tried venting the one in the car yet ...

Dave

He has owned the car for a week, and right away he wants is a louder BOV. Need I say more..............????

Do you guys get surging when you put small (pepboys) air filters? My PCV works fine with it, but the BOV dosent. Now i put a elbow to quiet it out but its still annoying.

What adam you don't want to be cool making a sneezing noise every time you shift? :lol:

only a week huh, i waited about a month in a half before messing with my car, im sorry to say but i dont think his fd will last.. and for the one who wanted it quiter cant you route the hose back into the intake, wouldnt that quite it up?

Yes that would make it quiet, but clearly i have an aftermarket intake since im talking about adding filters... I have the fighters garage intake which looks like the pettit.

Soooooo do any of you guys get surging with a filter on the BOV!

whell im not sure but i have seen pictures of it done, but i dont think it will hold much because the amount of pressure there is

If you vented the CRV with the ABV, then yes you will pretty much hear it all the time. If you only vent the ABV, you'll only hear it when the throttle plates close.

the CRV is the one closest to the firewall with the black label on it. i only vented the
forward most one.