I installed an Apex'i BOV on my FD last night, I set it to the large hole in the disc on the bottom, but it still wasn't that loud. with the windows up I could barely hear it over the RP exhaust. It was raining so I couldn't try it with the windows down. My stock BOV (disconnected from the factory airbox) seemed louder under boost. My car runs 10psi, and I can't figure it out. I was expecting it to be much louder than stock. I guess when I read "louder than stock" I was thinking about the stock BOV discharging in the atmosphere. Maybe they meant louder than stock with it still connected. Any idea's?

 

Nope. I once had the Apexi BOV and hated it. It sounded like crap.

 

Set it to the small hole. It's quite a bit louder.

 

if you want something to be heard check out turbo xs rfl...substantially loud

 

Why not just get one of those electronic BOV noisemakers and jack it WAY up with a big amp? I think that's the sound you want.....



Brian

 

I just ripped the ring off of mine.

 

Thanks chode boy, er..I mean wargasm...

Just trying to get some info...
'Thanks to everyone else.

 

I think you're going to find few friends on here that are more concerned with noise than function.... but to each his own.

Brian

 

sound is important... if not EVERYbody wouldnt be jocking the RB duals all the time.

 

I do agree with you on that one, wargasm, to each his own. I am pleased with the apex'i function, as I have been researching BOV's for some time now, just wanted to make it sound how I like.

 

So the sound is most important to you guys? That's really sad.

 

No, sound isn't the most important thing, but would you rather have a nice sound or something that sounds like it came off a semi? Presentation is everything, being able to back it up is next.

 

That's like saying looks are the most important thing and that's sad which would pretty much eliminate people getting body kits and rims. Everyone has different goals for their car. Just because your goals aren't the same as someone else's doesn't mean they are wrong or stupid.


As for the Apex'i BOV, it's not a really loud BOV. If that's what you were looking for, you bought the wrong one. It retains the "whoosh" sound, but that's about it. I do think it's better than venting the stock BOV as the spring doens't vent under vacuum like the stock BOV. The largest opening is the loudest setting.

Make sure you don't have any other problems, like boost leaking, as it should be just as loud if not louder than the stock BOV vented.

 

If it's the sound that makes you happy then "to each his own". That's pretty ironic, huh?

I like the way blow off valves sound, so what. I am sure those that buy exhaust systems are also concerned about the way they sound. I don't see anybody jumping down throats questioning the sound of an exhaust.

I have the Apex-I blow-off valve and like it because of its conservative nature. I don't like the ones that scream like a wild banshee. That is only because they can get too loud for comfort, kind of akin to a loud exhaust. Wouldn't you say?

Don't label me because of my preference and interest please.

Garrett

 

Makes no sense.

If there are 3 or 4 engineers standing in a room preparing to design a blow off valve I would rather they focus their energy on the sealing properties, the pressure relief mechanism, the repeatability of its action and the overall quality of its construction.

I simply can't imagine spending any time tuning the thing for sound. Purchasing a BOV by what sounds it makes is akin to purchasing tires because they make more smoke and better looking burnout marks than another brand.

It baffles me. I clicked the thread because I thought there may be rational discussion about different brands of BOV. I may purchase one soon and I have absolutely no interest if it makes a fart noise as long as it was engineered correctly and works as promised.

 

Are you sure about that? Mine sure as hell seems louder on the smallest setting. Can someone back one of us up on this? You are right about it not being a very loud BOV overall. I think that is a good thing though. Sounds just right IMO.

 

Very well put Mahjik.

 

Get a Blizt.. u will gert both sound and function that u wanted

 

I tried all the holes last night running up and down the street, and I think the biggest hole sounds louder. I like the sound and I think I'll stick with Apex, rather than blitz. Plus Blitz is pricier. Plus I've already bought the Apex'i.

 

Interested on this BOV does anyone know of its functionality also?

probably only going to be using it for 10-15 psi, if this info matters.

Thanks!
Edgardo

btw. I emailed them about a FD adapter, and the response was:
"Actually, the H-Supra kit will let you intall a BOV-H or BOV-H-RFL to the 93-95 RX7."

Or should i start a new thread regarding the TurboXS BOV performance?

 

Sound is not the most important factor, but it most definately weighs in when purchasing a BOV. Just like an exhaust, or midpipe, function is not the only thing I'm worried about. My car had better sound, look, perform, and act the way I want it to, and that includes a BOV that makes the sound I like. Wanting a bit more sound from his BOV, is not going to KILL his performance anyway...

BTW, engineers design products with sound in mind all of the time. From car engines, to BOV's, to tires, and even the aerodynamics of the car. It's all part of engineering, that gets if fair share of attention in detail.

 

I dont reccomend the Blitz unless you enjoy the sound of a bird being squeezed to death very suddenly at the back of one of those eipiphone thingies

 

That's exactly why I use the stock blow off valve vented into the airbox.

 

There is MUCH more to engineering that just function. Some people may have a **** fit about that, but if the FD itself was designed with just function in mind it would not be anywhere near as beautiful and attractive to many people. A true engineering design is complete. You start with function, make it so the consumer will like it (sound in this case) then go back and make sure the function was retained. This is why BMW spends millions of dollars a year acoustically testing their engines to make sure they sound good. You might say you don't care if it sound like crap as long as it puts the power down, but does it really hurt for it to sound sweet too? I have the Apex'i BOV, didn't need it...but none of us really "need" a BOV.

To address the question at hand, the Apex'i does not sound like a typical aftermarket BOV. It is more subdued. But you picked a damn good and effect BOV. The sound will grow on you and you will appreciate the volume of it in time.