Who is using the stock blow off vavles with a good sized single?
 

I have been having a lot of problems using 1 stock blow off valve. I first mounted it on the turbo side intercooler pipe. And now I have it on the nipple on the stock elbow where the AWS hose used to go. Now I have the stock bov and stock crv together on that nipple with even worse results. I am getting a lot of compressor surge. Even when I rev the engine from the engine bay at idle it does it. The bovs are releasing a ton of air but maybe it isn't enough or they are opening too late? I can't figure it out, I guess they just can't flow enough air for a large turbo. The thing that confuses me is that it happens when I drive at even 1psi when I snap the throttle closed. If I slowly let off of the pedal in boost then it won't happen or barely happens and I hear the bovs go off. If I let go quickly I don't hear the bovs (although I know they are releasing air somewhat) and instead I hear Chh-chh-chh like the bovs are shaking while venting the air. It's a very cool sound but I imagine it is hurting the turbo a lot.

So far I am looking into getting a tial or greddy or hks bov. I will have it welded to my intercooler pipe after the intercooler and also leave 1 stock one where it is now on the elbow.

What do you guys think? This is pretty interesting to me I always thought a bov was a ricer mod and that the stock bovs or 2 of them could release that much air.

thanks

Man....you spent all this money on your car and kept the stock BOVs? CJ

ok your reply wasn't helpful at all
I am not a newb I was on the forum before I just got a different name for reasons I can't talk about lol

Like I think I said above, its too long for me to read haha I thought the stock blow off valve was adequate to rid of air on any application. Now especially 2 of them together. I am perplexed as to why I get the surge at even 1psi if I let off of the throttle quickly. The stock bov can get rid of 1psi I'm sure but maybe it's not fast enough for the turbo specifically.

please if you have something helpful to add do so and everyone else also I need help.

stock fd bovs are plastic and leaky. they're responsive enough but they're probably so old that they're useless.

buy an aftermarket one and be done with it. no-one uses the stock ones after upgrades, especially a damn T66. :)

Where did you pull that from my car has very low miles and my last 3d gen had 81,000 miles the blow off valves don't go bad normally.

looking for some answers on why the stock bovs aren't working and if you guys think a big bov will fix this.

I am now between the hks SS and the tial for the rotary.

Does anyone have a sound clip of what the tial sounds like?

Because they are plastic... get a damn greddy elbow and a freakin aftermarket blow off valve....

Personally I think you have installed you Stock BOV's wrong....

But seeing how you are an expert in the community I dont really see how that is possible... :)

So the stock bovs aren't working because they are plastic...hmm nice investigating. I'm trying to get some real answers here. Comments like "they suck, they are old or they are plastic," I don't give a flying fuck about.

I personally think you are a fucking idiot.

And for your last point. I don't think I'm an expert I was just telling people that I'm not a complete moron so don't start with the basics. I think that I'm capable of putting a vacuum line on the stock bov and running it to the upper intake manifold. Have you used the stock bov with your single turbo successfully? You didn't read anything above. I said that I tried three different ways already. 1. with 1 stock bov on the intercooler pipe before the intercooler. 2. with one stock bov on the nipple on the stock elbow. 3. both and abv and crv Td together from the nipple on the stock elbow.

I didn't try having one on the elbow and one on the intercooler pipe at the same time but that seems like the best idea and has the most chance of working. I already took off the nipple on that pipe however and rewelded it.

I am 90% sure now on the tial. I just don't want to get it and weld it to the intercooler pipe and still get the surge. If I'm going to still get it I'll keep the stock bovs.

You kept the stock BOV with a T66???????

It's not because it's plastic or all the stupidious you already discussed. It's because it's TOO SMALL!!!!



:ar:

first off, don't be a dick.
second off, the title of this thread is "who is using the stock blow off valves with a good sized single?" and the answer is NO ONE because they are small and plastic and unreliable.

You've already said you mounted it on the Turbo-side intercooler pipe, which is not the best place to put it, and may be affecting the response of the blow off valves to begin with.

The "ch-ch-ch" is the valves fluttering because they are not working properly. You can't adjust the stock ones, which is ANOTHER reason why nobody uses them.

Furthermore, whether your cars are low mileage or not, they're still at least 8 years old, and you ought to know that the underhood temps of a rotary (ESPECIALLY an FD) kill all things plastic. While 100% of them do not fail, there is a high failure rate.

Almost all OEM BOVs are the Bosch plastic model. They break. A lot. That's why many times the first mod for a turbo car, "ricer" or not, is a BOV.

Phew.

victor

Quote: I personally think you are a fucking idiot.
I'm sure plenty have the same to say about you for building a T66 with a stock BOV!!! You should learn to be polite if you want anyone here to help you!!!! Read the other post about not even having a BOV... Why don't you just try that and quit telling everyone that tells you the Stock BOV won't work IDIOTS. Let us know how it turns out? BTW: I'm not trying to preach here, I just find it a little ignorant on YOUR part for not investigating this matter before dropping Grands$$$ on a single set-up. But to each his own.... Good luck! Damnit... $150fc beat me with the scoldings:)

Hey well at least I got some responces now. Still NO evidence at all just your fabricated opinions as usual unless jimlab along with a few others is on the forum I take everything with a grain of salt.

Any way I guess I look stupid because my question brings out that reaction from you guys that you're superior because I'm obviously dumb for using a stock bov. Ok so it simply doesn't flow enough air right? So why does it surge when I rev it at idle or even at 1psi then? I'm just trying to learn how the stock bovs work and what their limitations are. There are people using these bovs running 18psi and they are FINE. Including $150s friend with the 1995 plus bnr stage 3s. All of your shit here is BULLSHIT. Unless one of you has tested the bovs and taken them apart then please dont say they are too small or everything else. Give me a break please guys where do you get all of this horseshit? It pissed me off how stupid people are they hear something from someone and just pass it along on this damn forum.

I searched and found several members that were still getting surge after installing blow off valves ranging from shitty ones to the Tial that I am thinking of getting.

So I'm asking the people that don't know anything such as 150 to go away. I am not an asshole, just tired of people talking when they dont know wtf they are saying just to say it so they look cool. You guys think I'm trying to go cheap or something? I love my car and I loved my last 3d gen I take care of it and this is the next project for me to fix the surge or I wouldn't be asking. Who wants to spend money on a bov that they dont need that may not solve the surge problem...thats why im asking

SurgeMonster (must be a HUGE asshole because he uses the stock bov lol)

Move the BOV so it is close to the throttle body. It will work much better there since that's where the pressure builds up at first.

Very logical. Also why would you put a potentially faulty piece of plastic near a HOT turbo? Just for heat reasons he should have mounted it at the throttle body. i wont be running a T66 but my BOV will be at the throttle body.

guys thanks your responces were much more helpful or an attempt to be helpful at least

As I typed 2 times above I already tried the bov Right at the elbow which is about 1 inch away from the throttle body. The place I had it before was on the intercooler pipe near the turbo but still about 2 feet away from the turbo so it wasn't getting hot. Infact it was right above the intake filter which is freezing cold because of the air setup that I have coming from the front bumper.

someone else try

I have the tial. If you have the tial and have surge it is because you do not have the right spring. Tial will send you the right spring for free on condition that you send the other spring back. The tial sounds like a "woosh" rather than a whistle. Sort of like a "bullwhip" made of compressed air. It is pricey-over $200. I have zero compressor surge and zero problems. My tial is on the turbo side.

I know this is a moron mistake, but double check the way you installed them...they check and flow a certain way and that could possibly be ur problem...the vented air could pull at the diaphragm and cause spikes cuz its being restricted. Other than that, im with the others in that they are defective. Not saying that stockers WONT work, but they must function properly to fill that claim. And honestly, after dropping thousands of dollars on a T66 setup, i would have definitely put down another $100 or so for a BOV that doesnt always make me wonder when its going to crap out on me.

-Zach

YES guys there we go

I didn't install the bovs wrong. I pulled the engine on my last 3d gen and put everything back...I understand how everything works. non seq, seq, and single

thanks I got the tial bov now and I'm going to have it welded when I go home in ~2 weeks. It will have the correct spring for the 2 rotor engine

I am still deciding if I should put it on the turbo side or after the intercooler. But I guess it doesn't matter that much. I have to have my turbo side pipe redone cause it looks like shit any way so I'll probably do it there at the same time.

IF someone can get me a sound clip I'd love it im too excited to wait 2 or more weeks. So it's not at all like the stock one or what? Ive heard sounds like a golf club swinging and also what weakling said that its like a bullwip but I still wanna hear it.

the most ideal place to put a BOV is close as possible to the TB, simply because thats where the pressure starts. Some will argue that your venting air already cooled by the IC, but you wont ever have to worry about that pressure creeping back to the turbo!

Since you think that the best place to put the blow off is near the throttle plates, what effect do you think the pressure drop across the system will have? We all know that there will allways be higher pressure at the turbo than anwhere else before the throttle body. Even if what you are saying about the pressure building at the throttle body first is true, wouldn't you want the blow off as far away from that point as possible so that it has time to open before the pressure builds? Let me add, that I have tried my blowoff near the turbo and near the throttle body and there was no noticeable difference in the amount of surge.

A little bit of info pertaining to the origial question. The blowoff is opened by vaccuum, but it is not necessarily opened as soon as there is vaccuum. Most blowoffs need to see more vaccuum than is pulled at idle to open, and require pressure in the piping to help open the valve. This is why at low boost pressure most blowoffs don't open. Compressor surge at low boost isn't going to kill the turbo. As long as you don't get surge after medium to high boost your blowoff is working properly. The reason the stock blowoffs should usually be replaced is not only that they do not flow enough volume for most single turbo's, but that they leak at anything over stock boost levels.

I am not convinced that the stock blow off valves don't have enough flow capacity if two are used. To fully investigate this, try to add another full sized nipple to feed the second stock blowoff valve, running two off the same nipple will limit the flow capability significantly IMHO.

You may want to test the valves with a vac pump to ensure they are working as well, might as well.

Let us know if you get it to work. This setup should work with reasonable boost levels.

Or how about run 4 stock BOVs?? That would be so cool! Run two by the TB and two by the turbo!! :rolleyes:

CJ

HAHA

ok guys point taken

NOW....I really love the sound of the hks ss bov but I KNOW the tial is the best because it has that spring just for the 2 rotor since it pulls less vacuum right away. Do you think that I'll ever be able to adjust the hks ss one as good as the tial spring so that it doesn't leak air but releases air at the slightest hint of vacuum?

I know the 2 stock bov thing may probably work but I was dumb and I had my friend weld the pipe already....
I am thinking of tapping into it however and trying 2 out. I also agree with you that 2 bovs must flow enough air...I'm running 16.5psi max and 10.5-11 as my daily driver setup (usually :D )


Now we got some progress thanks everyone

holy shit dude, you are an idiot.

function before form dude. Who gives a flying fuck if it sounds a little better if it still allows ur compressor to surge. :rolleyes:

Edit: had a new idea. Just cut out 1/2" dia. holes all the way down the IC pipes and get every forum member to send ya a stocker, then T off a vac line about 60 times. That HAS to flow enough air!

Just get the tried and true one, something nice, simple, inexpensive that works.

-Zach