I took of the MR BOV and replaced it with the plastic stocker after ~10k miles.

I had no major problems leaking boost but sometimes sometimes at WOT it sounded like it was still open a bit, and it's hard to hit my flashed 19 psi so I picked one up.

Initialy i reported that it was relatively transparent in driving. Nothing dramatic, bad or good, but after a few k miles all the little weird things that happen driving around on the street began to show through. Light throttle lift or any subtle dynamic changes this valve will flutter, chuff, or sqeak more than the stocker. For example lug the engine in second from a stand still and let off quick at 3~4k rpm it will surge bad. The stocker cannot be fooled and just blows off normally. The stocker also seems to be more resitant to stumbling and stalling.

summary: In mostly stock trim the softer spring seems to help street drivabillty so much it's not worth dealing with the MR BOV untill I am running boost pressures well beyond the range of the stocker.

 

I had the same thing, and I took off the MR BOV and put the stocker back. You know what, I am thinking the problem was more with HKS RS Intake. I think due to the effect it flows so much more air, the MR BOV was not made to see so much air, i am just thow an idea out there. I am actually going to take off my HKS RS Intake and put the stock one back. And if I will have a problem with boost leak, I am going to get APS BOV. I heard really good things about it.

 

I had to read that title a few times lol

Evo23IG: I'd be curious to see if it was the intake or not. I've got a MR BOV coming soon (stock air box)

 

rs intake just doesnt work with much. I've posted many times about my MR BOv problems. I now have an aps valve and it works great. Once and while if you start the car after you went somewhere, the idle will be at 700 but goes back up in a few seconds. Greddy seems to work fine with the HKS intake as well. just an FYI.

 

Its hard to get any BOV working perfectly, its either too hard or too soft... I was going to get a MR BOV to see how that one works on my car but looks like it will have the same little annoying issues as my greddy.

Granted it holds boost all the way to 23 psi but under light lifts shudders and once in awhile I stall. Cams and Intake made the big difference in drivability in a bad way but its worth the power

 

APS my friend. Dont be taken by the price.

 

Got a link to APS? I'm lazy :P

I'm assuming its a recir not vta right?

 

I am running the Greddy Type-S with the single spring mod and running 22 psi on pump and 25-26 on race gas. Holds fine.

 

Here is great deal on APS BOV, I wish I had some extra cash.
http://store.yahoo.com/sgpracing-sto...duvebloff.html

Posted byjustchil "Evo23IG: I'd be curious to see if it was the intake or not. I've got a MR BOV coming soon (stock air box)"
I don't think thats going to happen because I just sold my MR BOV and my stock intake is in my PA house and I still have not gotten a chance to go get.

 

twin vent

http://www.airpowersystems.com/us_spec/evo/bov/blow.htm

 

That's why I'm going electric.

http://www.autospeed.com/cms/A_2188/article.html

I hope it meets my expectations. We'll see. noting ventured, nothing gained. I'm just tired of "all BPV/BOV leak" and part throttle fluttering.

 

No problems with the MR BOV here. Sure it flutters but never stalled, never shudders. Behaves the same as stock 99.9% of the time. If it didn't work they wouldn't put it on the MR, except for high boost situations I suppose. Have no problems with it working with the HKS RS either.

 

let us know how it works,very interested if it has fast enough reaction time.

electronic would make sense,hopefully we can make the big tuners take it out for a test also...

 

seriously, if that doesnt work, try the APS. You get no flutter/shutter. Its really a great piece.

 

WTF- I thought you had an MR DV?

And weren't you the one that told me running more than 21 psi on the stock turbo wasn't really worth any power increase as the stock turbo's peak is at 21 or so? ahah I'm confused. Have you changed your philosophy or upgraded turbo's?