Backstory: My wife bought me a blow off valve for christmas for my evo9 because she knows that I like the noise the VTA's make. What she didn't know is that this doesn't easily work on my car (which is why I never bought one for myself....).

I have searched and searched and I can find lots and lots of information on VTA BOV's. Unfortunately I can find an equal amount of people saying it will and won't work.

I've read suggestions of moving the MAF and using a GM or ford unit up against the throttle body. However the company that sells the control module for doing that did not recommend that setup for what I wanted (long phone conversation).

I've also read that a speed density setup will allow me to do that, but I'd need a good tuner (I'm in wisconsin) and there is quite a bit to that setup. The forums can't seem to agree whether or not it's a good idea for a daily driver (especially in very cold weather).

And finally I have been told by the valve manufacturer that I can try adjusting the screw on top (which did nothing for the stumbling). Overall they said the best operation will come from recirculating the valve (which I knew). The main problem with this is that I have no use for the valve in that case. The factory does that part fine and requires no adjustment.

So I've put on my flame-proof suit and I'm asking one last time if anyone has any other ideas on how to make this work before I have to tell my wife it's just not going to make the noise. As I said, I have searched not just here but all over the web and nobody can agree on whether or not it will ever work.

And if not, does anyone who actually has a modified engine want this valve? http://www.agency-power.com/catalog/...03-p-9352.html
This is my daily driver so the chance that I'll put in a big turbo or send it out to be tuned is pretty slim. I prefer to tinker with vehicles that don't get me to and from work.

Thanks to anyone who responds with useful information.

 

Thats surely a ton of effort just to create a sound! Seems like youve done all the research you need and are just in denial. The setup is just not going to work with the stock ecu, period. Since this is your first post, have you added an open cone filter? They usually increase bypass valve noises significantly and that might just satisfy what youre looking for.

 

I have not put an open intake on it yet because every one i've seen has no real cool air function to it. They just open up the box under the hood. This sucks a lot of hot engine air so to me it's never been a really compelling upgrade.

I have heard that recommendation before, but no one has said how loud it actually is. And if that does create the sound, I still wouldn't need an aftermarket blow off valve correct? The factory one should make nearly exactly the same noise when recirculated I'd think, but I could be wrong.

Yes it's a lot of effort, but I really want my wife to think she got me the right thing.

 

trust me, putting an open cone filter will dramatically increase the stock bypass valve sound. I did the same thing, i bought the hks bov and the injen intake at the same time. After installing the intake i realized i didnt need the bov anymore.

 

I agree with what others have stated. Its understandable that you want to make your gift work however it really isnt a good idea on the stock ecu assuming your still running a MAF. Either convert to speed density run a standalone or as others have said get an open air filter. I am running the evo 9 dv with a cone intake setup and I have all the bov sound I could ever want. So if I were in your shoes I would try out a cone intake as that is the most logical and simplest solution to satisfy your craving for the bov sound.

 

Ok thanks everyone. I think I'll look into some intakes for it then. I appreciate the information.

 

+1 for the above posts. An open intake will majorly change the sound of the turbo spooling, and venting of the DV.

Here is something else you might want to look at. I have no personal experience with it, so I can't say either way. Just trying to give you some more options. But anyone with a wife will know that spending $125 to keep her happy is a damn good investment.

HKS Electronic Idle Stabilizer
http://www.lancershop.com/customer/p...ctid=271&cat=7

 

I've heard that there's quite a few aftermarket BOV's out there that recirculate like the 9 ecu likes, but function much more noisy than the stock valve and so give 80% of the impression of a VTA valve.

Someone else can chime in with the brands that make the most noise. The point is just buy one of the noisy recirc valves instead of changing your whole setup just to make a noise.

 

You can get kits for many BOV's to work in recirc, which would retain mostly stock like drivability.

And saying it wont work on the stock ECU is incorrect, unless you consider a stock ECU tuned for SD a non-stock ECU.

My personal experiences though, I ran mine in VTA for a week before I went in for my speed density tune, and the drivability was livable. It is much better now that I've gotten it tuned for SD though, and would recommend that route.