Best B.O.V

[joeskrobacz]

What would be the best B.O.V to upgrade to for the 09 RA. This stock one just isnt cutting it. i wonder why they would even make a B.o.v out of plastic.

[laflsyl10]

i'll sell you my HKS bov if you like..

[CarGuy]

What would be the best B.O.V to upgrade to for the 09 RA. This stock one just isnt cutting it. i wonder why they would even make a B.o.v out of plastic.

Evo IX BOV made of metal is the least expensive and best way to go. Don't waste your money on others...I'm pretty sure the Evo X uses the same BOV as the IX's.

[Tommy Di Cat]

Def the cheapest, most reliable is the evo IX or X bpv. I bought an X bpv for $31+ shipping on ebay .

[MikeW-RRE]

The RalliArt valve is plastic and the 9 and X are made of steel. But both have the same spring pressure. Both have the same diafram area, both have an o-ring seal. The only reason to upgrade the valve would be if you are running up around 30 psi. If you had the steel 9/X valve you would be able to crush it a little in a vise to increase the potential pressure it holds. You cant do that with a plastic valve.

Changing the valve will not increase your hp on a stock turbo. Changing to an aftermarket one will only cause headaches with limp mode issues from unexpected air flow values.

Mike W

[ENEMIGO]

If I were to get a HKS Bov just because I wanted the sound and perhaps in the future get up to running high boost. Would a tune correct any air metering problems and prevent turbo surge or the vehicle running rich?

[CarGuy]

No...if you are letting metered air escape, how is the computer to know how much or how to compensate? The air has already been measured before the BOV, so if you let some out, how can it be compensated for unless you measure the amount you let escape...and all of that for a sound...not worth it.

[joeskrobacz]

Thanks alot guys, i never thought about tyhe air flow and leakage, the only mods i plan on doing is turbo back exhaust and reflash and boost pill, so i prob wont need a new BOV, i just thought i would like to hear it. HAHA i know thats stupid but its my first turboed vechile.

[MTZL]

Read this from
The wastegate is a valve inside the exhaust housing of the turbo. It is controlled by pressure from the intercooler piping. When the pressure in the intercooler piping gets high enough, it pushes a rod that is hooked to an arm. The arm connects to a valve inside the turbine housing of the turbo. When the valve opens, it allows the exhaust pressure to bypass the turbine wheel. This means less exhaust pressure to spin the turbo. The turbo speed and therefore the boost pressure is regulated by the wastegate and the rest of the boost control system.

An aftermarket external wastegate is used with large turbos. You will usually find it hanging off the exhaust manifold. Larger wastegates don't make more power. They allow you to keep control of the turbo speed of a big turbo better:

A Blow Off Valve, Compressor Bypass Valve for your purposes are essentially the same thing. When you are mashing on the throttle, the turbo is pumping air at full force. The throttle is open, the engine is taking all the air in that it can. Everything is good. When you let off the throttle, everything stops dead. The turbo gets bogged down trying to pump the air into a closed throttle plate. The air has nowhere to go and tries to go back out the turbo as the turbo is trying to pump more. The turbo gets slowed down in addition to all kind of bad forces acting on the compressor wheel.

So starting in the early 80s manufacturers started putting a valve that would open when there is a certain level of vacuum in the intake manifold. The valve opens when you let off the gas allowing the turbo to kind of freewheel. This maintains the turbo speed better so that you have more boost when you get back on the throttle.


This is going to come up so I might as well answer it here:


The Holy Grail of anyone under 25 years old with a turbo car is to have this excess pressure release heard by other kids under 25 years old. High school boys are particularly impressed by this PH-Shhhhh sound. Word is that their high school girlfriends will leave them and come and jump into your car. Cools stuff indeed.

You can spend time and money trying to achieve this sound by taking off the factory BOV and replacing it with an aftermarket one. The aftermarket one will need to blow the air out so that it can be heard by the high school boys. You just cap off the hose where it was blowing back into the turbo inlet pipe.

On Mitsubishis this creates several issues. The ECU has seen all the air enter the system since it was measured by the air flow meter. The ECU gives you the right amount of fuel for all this air. If you blow a grip of air out for the high schools boys to hear, the ECU has no idea you blew it all out. It still gives you fuel for the air you let out. The car goes rich and almost stalls or bucks. The high school girls do indeed get wet though. It is a trade off like all things in life.

The answer is to tighten the aftermarket BOV so it does not blow off as much air so that the motor stalls. Now you hear this turkey gobble noise like “cha-chooo-chooo-chooo”. Think any HKS BOV you have heard. That is the sound of compressor surge destroying the turbo. Congratulations! ;-)

But sp4rkl3bunn3y on the forums says he runs his car blowing out and it does not stall. Well sp4rkl3bunn3y has a stock turbo running low boost and the little compressor surge he gets isn’t going to hurt much for now. He thinks the compressor surge sound he is hearing is a cool BOV noise. Higher boost and a real man sized turbo will make it undriveable.

Also on your RalliArts the way that the tranny is always up shifting and the ECU has more control over the throttle than you do I doubt you would hear much.

With the Mitsubishi drive by wire system there are a bunch more checks and balances with what air flow the air flow meter should be seeing at any given RPM and throttle position. I have seen so many EVO X guys fight SES lights and limp modes with various aftermarket BOVs. It is just another big mess to deal with. Even if you are recirculating the air back in, if the BOV is looser or tighter and allows different than expected air flow past the air flow meter, it is just misery.

I was looking at the stock BOV and saw that it was plastic. I thought that it might leak under higher pressure. I noticed that a stock EVO X BOV would bolt right on! SWEET!

But I looked inside the two BOVs and saw that they both had an o-ring seal on the valve seat. I tested the spring pressure and they are both the same. Changing this stock plastic BOV on the stock turbo will not make any power gain. If you will be running over 30 psi someday, then think about changing the BOV. Otherwise a different BOV is for nothing other than vanity or headaches.

Mike W

^Go through all of the Forums you'll see information that will help you with your mod if you choose to do so. I will hate to see bad mods that will hurt RA.
You can make the sound (coo-coo coo-coo swooosh) that will attract some broad and make her wet but you'll be in *LIMP MODE* and next mod after the BOV get Viagra for *Limp Mode*. LOL

[ENEMIGO]

Very good Sir!

[CarGuy]

The only dumb questions are the ones that you don't ask. Always ask, we are here to help.

[RalliUp]

Has anyone actually had these issues with a BOV? I'm ready to buy this one or something similar.

http://www.ultimate-racing.com/Products2/LancerRalliart-09/LancerRalliart-09_BOVKit.shtml

[justin81]

the only one I've heard anyone using is the dual port turbos smart valve. I could be wrong though.

[excessiveboost]

Just go with a EVO IX or EVO X BPV

[MikeW-RRE]

Ouch, you like all my threads. Do I know you?

If they (plastic and metal) have the same spring pressure, the same diafram area, both with o-ring seals, what do you attribute the difference in performance that you have heard of being?

Trust me, I would love to sell more parts. It pays the bills here. I stock the metal BOVs. In my mind I looked at them both and they looked like they would perform the same. I had one hold over 24 psi for a couple thousand rpm so I dont think it would leak at only 20 psi. One advantage to the metal ones is that you can crush them to hold a bit more. But that is usually for guys running over 30 psi.

The older plastic BOVs and ones from many other cars do not have an o-ring on the seal and they do leak a lot. 2G DSMs leak at only 13-14 psi for example.


Mike W

[freddie07]

Mike,

How much do you sale the metal stock BPV for?

[MikeW-RRE]

$165

Mike W

[freddie07]

$165

Mike W

Then in that case you'll be hearing from me by my next paycheck. LOL

[zeRep85]

So no aftermarket B.O.V. OR intake...check.

zeRep
:)

[Ralliart13]

If I were to get a HKS Bov just because I wanted the sound and perhaps in the future get up to running high boost. Would a tune correct any air metering problems and prevent turbo surge or the vehicle running rich?

Ive been driving my GG RA for just about a year now(lovin it!), and i have installed the X BOV, cat back exhaust and a HKS drop in filter. Those mods alone made the "Swoosh Sound" much more audible even while recirculating back into the turbo inlet. Im almost 30 years old but like the highschool boys.... I love that sound. :D

[RA9]

you still have your HKS BOV?

[Tre]

Ive been driving my GG RA for just about a year now(lovin it!), and i have installed the X BOV, cat back exhaust and a HKS drop in filter. Those mods alone made the "Swoosh Sound" much more audible even while recirculating back into the turbo inlet. Im almost 30 years old but like the highschool boys.... I love that sound. :D

i know i hate to admit it but i have a bit of inner ricer in me to. I enjoy hearing my cars exhaust notes, engine noises etc. I installed a turboXS hybrid bov today. http://www.turboxs.com/uploaded_images/445.gif
Its just the universal one. I was able to install it quite easily on my RA.
First removed the OEM diverter valve. and install the turboXS. it sat a bit too high for my liking and was rubbing on the underhood lining. so after surveying the situation i decided to remove 1" from the rubber S shaped hose the runs from the bottom of the bov to the lower ICP. put it back together and perfect fit.

took it for a test drive and was fully impressed with the sound it let off. I have it set to 50/50 recirc/vent. There were no drivability issues. No CEL's. just the added sound of the bov itself. if i get a chance this weekend i'll try to take a video in car and a driveby of it if anyone is interested.

now i know this did not add HP. i did not expect it to. is it a waste of money? thats for you to decide.

edit: here are some pics i took real quick in the garage. snapped one of the piece i had to cut off the OEM hose.

http://i122.photobucket.com/albums/o268/tyakel_photos/Ralliart/DSC01654.jpg
http://i122.photobucket.com/albums/o268/tyakel_photos/Ralliart/DSC01656.jpg

[MTZL]

i know i hate to admit it but i have a bit of inner ricer in me to. I enjoy hearing my cars exhaust notes, engine noises etc. I installed a turboXS hybrid bov today. http://www.turboxs.com/uploaded_images/445.gif
Its just the universal one. I was able to install it quite easily on my RA.
First removed the OEM diverter valve. and install the turboXS. it sat a bit too high for my liking and was rubbing on the underhood lining. so after surveying the situation i decided to remove 1" from the rubber S shaped hose the runs from the bottom of the bov to the lower ICP. put it back together and perfect fit.

took it for a test drive and was fully impressed with the sound it let off. I have it set to 50/50 recirc/vent. There were no drivability issues. No CEL's. just the added sound of the bov itself. if i get a chance this weekend i'll try to take a video in car and a driveby of it if anyone is interested.

now i know this did not add HP. i did not expect it to. is it a waste of money? thats for you to decide.

edit: here are some pics i took real quick in the garage. snapped one of the piece i had to cut off the OEM hose.

http://i122.photobucket.com/albums/o268/tyakel_photos/Ralliart/DSC01654.jpg
http://i122.photobucket.com/albums/o268/tyakel_photos/Ralliart/DSC01656.jpg

You might need to get it tune. idk. lower gas mileage..without tune.. from what I've heard.

[Tre]

update: been driving it all morning for work. no CEL's and no noticable drivability changes.

as far as gas mileage is concerned. I could see it decreasing it. since i'm pushing the pedal harder now to enter boost :D

[MTZL]

LOL. You probably dont even care about the gas mileage huh? Ballah. :D

[Tre]

LOL. You probably dont even care about the gas mileage huh? Ballah. :D

lol not really :p i used to drive a 4.0 jeep. this thing feels like i barely burn any petrol in comparison. lol

[n my RA]

I'm running a GReddy Type-S that I took off of my 2g. Been on for about 2k miles or so, and no problems other than gas mileage. Just my .02

[Sakura09]

VTA BOVs or half VTA half recirculating BOVs are horrible replacements for the stock BPV. Ask any performance shop that isn't in business just to sell parts and they will tell you the same thing about the $300 noisemakers/AFRdestroyers/plugfoulers/turboeaters.

If the noise is what you want the CBE, drop in filter/shortram should get you some swooshness :D more on the filter side though. Dropin filter and SRI should require no tunning but a CAI will.

[hackerrei]

I ordered a dual port BOV for my 2010 rallyart sportback and it was full metal came with adjustment springs.
I tried both pair of springs and yes it made a sound when you picked up boost and the let off the gas.
But I started to feel that the boost was not picking up as quick as before.
The problem is boost leak from the BOV put the stock back on and the boost was back 0-60 times picked back up perfect.
So what I would say is upgrade to the EVO X stock BOV and you will be good.
If you have the SST there is no point like I said the only way to hear it is to push on the gas hard to spool boost then let of the gas then you will hear the sound but reg shifting even with high spool there is little to no sound.
Manual is ok you will here it every time you step on the clutch but there is always the fear of leak and loss of boost.

[i_drivecode3]

evo 8 bov work as well as the 9's and 10's? i mean if evo 8&9 are the same and 9 bov = 10 then 8 should be same as the rest right?

[Tuqwik4u]

Yeah i have an Evo9 oem bpv, It fit right in in less than 5 min, Direct bolt on. It even sounds a lil better than the stock one.

[Jackal]

I ordered the HKS Blow off valve listed specifically for my 09 Ralliart almost a year and a half ago from Ultimate racing. I drove the car for a couple weeks to determine that I needed to order the recirc kit for it. I ordered it from Lancershop.com.
Drove it for a year with no problems and good response after putting on re circ kit then got my car tuned in the staes about 5 months ago still no issues with BOV.
You guys would not believe how hard the card pulls at -30 C with the extreme cold dense air and 94 Octane fuel.

[Mkid]

If you could compare the HKS with recirc kit to the stock BOV which would you say is louder or are they about the same?

From vids I've seen it seems like they are about the same.

[hackerrei]

If you want the cool bov sound like in the movies you need to get a bigger turbo and run more then 20 psi of boost.
I tested the same go fast bits stealth fx bov on my RA and EVO 8 gsr.
On the RA there was a nice woosh at full boost but not loud enough for any one not near the car to hear and frrom the inside with windows up I was almost able the hear it with music off.
On the evo 8 the sound was like a monster blowing its nose very loud you could hear it from the end of my block and it was a big noise from only half boost full out boost was a great big noise.
So to get the sound that puts fear in N/A cars that we love to make a must is to 1- run more boost 2- get a bigger turbo other then that you will just get a little fart of a sound like the srt-4 guys make.
But for bov the go fast bits stealth fx has worked great for the last 9 months no problems on rec or full vent on both the ra and the evo 8.

[vplukas101]

If you want the cool bov sound like in the movies you need to get a bigger turbo and run more then 20 psi of boost.
I tested the same go fast bits stealth fx bov on my RA and EVO 8 gsr.
On the RA there was a nice woosh at full boost but not loud enough for any one not near the car to hear and frrom the inside with windows up I was almost able the hear it with music off.
On the evo 8 the sound was like a monster blowing its nose very loud you could hear it from the end of my block and it was a big noise from only half boost full out boost was a great big noise.
So to get the sound that puts fear in N/A cars that we love to make a must is to 1- run more boost 2- get a bigger turbo other then that you will just get a little fart of a sound like the srt-4 guys make.
But for bov the go fast bits stealth fx has worked great for the last 9 months no problems on rec or full vent on both the ra and the evo 8.

since ur in austrila do you know the guys from mighty car mods? :D

[Mkid]

So it seems like an aftermarket BOV will barely make it any louder unless your running more boost. I got an HKS drop in filter and its quite a bit louder. Thats probably about as good as it is going to get without more boost/bigger turbo.