X2

 

I just received today my APS BOV and it's huge! My stock DV is leaking, so I'll be replacing it tonight.

Before installing it, I didn't receive any instructions so I'm not sure which port goes where. Can anyone give me some directions? Stock piping just in case.

 

I got the aps and have had zero issues with it

 

Im sorry, but my HKS ssqv never caused any drivability problems... I mean, how much could a blow off valve do to affect the car's drivability?

 

the Evo IX bov is a very good unit, and if you replace it with an APS, you are going in the wrong direction of "goodness". If you buy the APS for sound, just admit it. The APS doesn't create driveability issues that you can feel, but any air vented to the atmosphere with a MAF is bad, bad, bad. Keep the original Evo IX bov (to the original thread starter and to you) if you are interested in peak performance. Get the APS if you want sound.... I have it, it sounds like a sneeze, and frankly kinda gay. All bov's that VTA that are on relatively stock vehicles equipped with a MAF are worse than useless.

 

I think you're not aware that the APS BOV recirculates back to the intake, it only vents to atmosphere at full boost. Even at full boost the sound is not loud, so you shouldn't considered it if you only want sound.

Now I'm gonna tell you my experience. Today I replaced my stock DV (Evo 8, crappy plastic DV) with the APS BOV. Pretty easy installation, it didn't take more than 15 min. Once I drove the car, WOW, what a difference! For all the people saying that the stock plastic DV is good for up to 24 PSI or so, you all are wrong. I have a Forge MBC set at 21.5 PSI and it didn't taper, it went directly to 21.5 and stayed there (when using the sotck DV). I was very happy and thought everything was fine (well, after solving the spike issues with the MBC posted lately). Today that I tried the APS I realized that my stock DV was leaking pretty bad. As soon as I started driving with the new BOV my boost gauge showed 25.5 PSI, that means that my turbo has been pushing 25.5 PSI all the time, but my stock DV was leaking 4 PSI. Another thing I noticed is that my MBC now tapers about 1 PSI, something normal on any MBC, but I didn't see that before because of my leaky BOV. Leak is not the only issue, now my car runs way better, smoother, shifting is so smooth now, the turbo stays spooled in between shifts, the car feels way faster. It's not that I got an increase in WHP, it just that my turbo runs safer.

Basically anyone playing with boost (either with a BC or flash) should upgrade the DV, unless it's an Evo 9 that comes with the JDM DV.

 

you have an EVO VIII, you can't compare your stock dv to the stock EVO IX dv, they are different. What's your point? Based upon the original question, I don't see how your comments are relevant? I'm glad the APS worked for you and gave you gobs more hp (gotta dyno sheet to back up your increased boost?). But the APS on an EVO IX won't show the same gains as it will on an EVO VIII.

 

Lots of talk of BOVs here. Personally I was against them because I didn't care about the "whoossh". But I just recently bought the newer Forge RS DV. No issues at all. Haven't even seen flutter yet. But to be honest, everyone is right. The stock DV is adequate till you need higher boost. But you might want to check the forge out.

<end shameless plug>

 

well i dont want the aps for the sound i just want a bov that will hold boost because the factory one is nice and all but it wont hold as much boost as i want to run so lets start a poll: what is the best bov to hold boost(regardless or sound)?

 

And exactly how much boost do you want to run?

 

wouldnt be just for sound. i dont have any plans to replace it for a quite a while or unless i start doing heavy modding to the car. first things planned for the car are exhaust and tune, BOV is down the list a little ways

 

If your were talking about my post when I said "stock bov" in one of my post I was refering to the thread starter whom has a IX

 

I wasn't referring to you, I was talking about all other posts where people say the stock DV (on the Evo 8) is good for about 24 PSI.

 

Ok , yeah they are trippin

The plastic pos started to leak @13psi on my testing , but you allread know that now .

 

APS has worked for me up to 30psi, and I have used a JDM MR valve and obviously the stocker. No comparison in my opinion and the APS is adjustable. It is really pretty quiet and wouldn't consider it a ricer mod. It can hold a lot of boost and is much better than either of the valves mentioned before when going w/ higher boost. When switching from the stock to the APS you will usually pick up a few PSI due to leaky nature of the stocker. It isn't a mod that is really needed though until you plan on turning up the boost though.