Which BOV?

[turbonatormr2]

Good enough.. Thank you.

[Weasy2k]

watch out...the VTV can EASILY break

[flyingbrick]

And they are impossible/expensive to get new.

[osoRiceMR2]

Damn, might have roll stock when it come down it, from what im hearing. still wanna do more reserach on that HKS bov.

[Shortee]

I have a Zen BOV. It's pretty loud and I'm running stock boost. But I'd have the agree, the car runs smoother without it.. but I love it.

[tyzzdogg]

I currently have the Turboxs RFL BOV and someone told me its roughly 130-150 decibels when it "blows off"....I like it just because it is so ridiculously loud (also have Blitz Nur Spec exhaust). Yes, I probably will go deaf before I am 30. Ive heard throughout being in this community and from other MR2 owners that it leaks. I have had some instances when the car idled extremely low and almost stalled...I am assuming my BOV needed adjustment but that has only happened once or twice.

When I have more money I am getting the HKS sequential BOV. Ive heard so much that stock is the best, but I personally just like having a turbocharged car with a bov that vents into the atmosphere. It gives people something to talk about, even though most people have no idea what it is and Ive had people ask me if my car is broken after I drove by them and the car blew off (due to them never having witnessed a turbo car).

Ive witnessed other BOV's like the Tial (which is extremely quiet and subtle), Greddy Type S which also has a nice sound (I know this is lame but I just watched this tonite cuz my girlfriend wanted to see it again...the green eclipse in Fast and the Furious uses the type S). I have a friend w/ a turbo IS300 and he got one of the blitz BOV's and it is short in sound and kinda loud but not too bad.

[ZJTurbo]

Good info i never realized that bov's can make you car run rich when not under load.

Tial

[ZMR2]

Originally Posted by MR2_SW20

probably because the fastest mr2s are running stand alones and converted from an afm.

As for HKS, it resembles the oem bpv the closest, being a pull type valve which under pressure, pulls the valve shut, and once its off pressure, it releases IIRC.

I just installed the hks ssqv, its NIICE, nice whistle/flutter to it, and turns heads EVERYWHERE, it makes it even better that some people think i drive a mini ferrari

Heres mine with the HKS, its a fat little ******* though, and not 1 problem with it.

How much did you get this for?? I was looking into getting one... But juss kinda looking cause Im seeing how much money I have left from other stuff I need to do to my car

[Loki]

Just to be up front: for me, the stock BOV is an ugly turd.

Every BOV works on a pressure differential with a spring and diaphragm with one side on the charge pipes, and one side connected to somewhere behind the throttle body; only the HKS and the stocker appear to operat solely from the manifold side with check valves to create the necessary pressure differential (internal on the HKS). I'm not sure why so many people in the community favor this method of creating a pressure differential to open the valve as you have to pull against pressurized air to open the vavle with that system as opposed to most others where the pressurized charge air is pushing the valve open. If you are stock ecu equipped, certainly the stock BOV rerouted or an aftermarket BOV re-routed is most likely to run the best due to the metered air issue, but also keep in mind that the average stock BOV has well over 100k miles and 10+ years of use -- rubber and plastic don't last forever (seals, hoses, and VTV may well crack or leak).

I ran a Greddy Type R on my stock ECU and it was fine. I would shoot flames on occasion when shifting due to the slight rich condition when the BOV blew off. I'm not sure that's flaw as I quite enjoyed it (www.koracing.net/img/LokiFlames2.jpg). Proper adjustment of an aftermarket BOV is certainly critical. You want to balance the ease of it blowing off (i.e. get the best response so it will very quickly blow off when the throttle closes) to protect your turbo from surge, with it hanging open too much and causing un-metered air to get in, or too much of it getting out and the car wants to die. My usual adjustment method was to be able to hear it blow off at idle by manually manipulating the throttle (very low load on the engine).

For ease of use, the Tial is probably the best. It's one of the largest BOV's available at 50mm diameter (for those going to bigger turbos) and there is no adjustment on the BOV. I installed one last week on a stock ecu equipped car an the car took a day or so to *relearn* to catch itself and keep the engine idling when shifting into neutral, but after that it has been a champ. I experienced the same thing with the Greddy BOV when I had the stock ecu also.

What I also am not sure of is the capacity for the stock one to hold boost and not leak or blow apart at very high levels. I run 25psi at the track and know that the Tial is good for much more (40+psi). I've heard of stock ones failing above 18 - 20psi -- but granted, they are all old.

Which would you rather see:

This:


or This:

[Sang]

hey kris, glad to see you post here as well as the other board

^ that's no fair, ANY bov will look pretty good on your motor, even the bpv

but jeff (J&H) is still using his BPV on his gt35 stroker motor. iirc he still has the boost issue so he's running at 27psi at MINIMUM. it seems to be working fine for him. I do agree it's ugly, but it's functional and i love how quiet it is when recirculated as the blow off annoys me after the first month or so

[Loki]

Thanks Boz, It certainly has much to do with personal preference, and BTW, that's not my engine bay -- it's a customer's that I did a motor install, custom IC pipes, and KO style detailing on. The first picture is as recieved, and the second picture is after completion.

[Sang]

Originally Posted by Loki

it's a customer's that I did a motor install, custom IC pipes, and KO style detailing on. The first picture is as recieved, and the second picture is after completion.

oh my...looks like i need to stop my OR in the near future, lol

[spike93]

is it true that making the stock bov atmespere vented is bad on the motor and can blow the motor, i just got mine and dont want to screw it up, i have a plug for the recirc hose

[Sang]

you'll see some rich conditions during shifts. i do'nt know who'd tell you that you'll blow your motor...but that is definately not true.

[spike93]

does anyone have a greddy type rs or hks ssqv they are looking at selling

[mrdeuce]

Does anyone have a sound clip of the ARC BOV?

[Hiighboost2]

I have a greddy rs thats been sitting in my room for a while,
it was on my friends 240 and he said he wanted it back,
but maybe for the right price I could let it go.

[spike93]

how many miles are on it and can u send me a pic

[JMcInnis]

I bough the greddy BOV off a friend, works great and no ill downsides like many others have said it might cause. Also really no difference in fuel economy either.

[jjjxlr8]

http://www.takakaira.co.jp/accessori...ightpager.html

Have your cake and eat it too...lol. Use the superior OE BPV and get the ricey sound to impress your friends (roll eyes) without scarificing performance.