Okay this is the last time I will bring this up.
The HKS bov is not very good. SCC did a test of a whole pile of BOV/DV valves and it did horrible on preventing surge when you lift off the throttle. That said, I think it is pointless since that is your main concern with a BOV. Do I have to post the actual results from the test? Does anyone read magazines?
I am not knocking HKS, they make some good ****. But that valve did not do well. The forge performs better and is about half the price of the HKS. I understand you all want that sound but any valve with a cone filter, your going to hear it.


Evo2003.5:

The kickback you feel is really just the torgue backlash through the drive train. The stock valves are very smooth at opening and the car still does it with the stock valve or aftermarket. If you don't want the kickback as much just push in the clutch.

The purpose of the BOV is to relieve the pressure in the intake pipe when the throttle is closed. This prevents surge and damage to the turbo and at the same time it allows the turbo to keep spinning. A DV redirects the air back to the inlet of turbo and helps with the continuation of spooling. On the EVO, there is no good reason to vent to atmosphere. Unless noise is a good reason.

There is a valve there stock and if you replace it with a DV (recircing valve) it doesn't affect emmisions or driveability. Chances are no it doesn't void the warranty either because most people know what it's function is.

 

Unless you plan on purchasing some kind of fuel management component with an idle adjustment option I wouldn't recomend purchasing a bov that vents to atmosphere. There are a handful of re-circulating bov's out there and you can also purchase a re-circulating kit for the HKS ssqv. IMO the stock bov is fine and if you get yourself an open air filter such as those from RMR or Buschur or even the HKS racing suction kit you will be able to hear the cool WOOOOOSH sound from the stock bov....if that is what youre after.

my 2cents
ran

 

DO NOT DO NOT DO NOPT DO NOT SO NOT!!!!!!!!!!!!!!!!! Vent into the atmosphere, in fact such a stupid mod screams ignorance and stupidity. I have built a 2G AWD DSM with every bolton you can think of and do have some knowledge on the 4G63 and tuning with the MAF system.

1st the HKS SSQBOV DOES hold as much boost as you can through at it, but it takes about 22+HG's of vaccume just to open it. Don't even think about adjusting it, I even removed teh tensioner srcrew and it STILL made my turbo surve, car bucked, and even stalled quit often because of that valve. At WOT it worked great, as I was running 21PSI of boost on the street, it opened and let it all out instantly, reciculated back into the intake. But at part throttle, of hitting the gas and letting off, it stalled everytime, not usable at all.


THE MAIN REASON not to vent into teh atmosphere is you car cannot cope with the lost air. Air gets suckedin and is IMMEDIATLY read by your MAF and then is counted in a form of code called Karmen. This code is transfered to your cars ECU and it understands it as a certain set value of air entering the engine, then teh ECU instantainiously dumps fuel into the engine (BTW this is all happening continiously with infinate variables of airflow) based on that Karmen reading.


NOW


You dump that air into the atmopsphere, probably while listening to a Linkin Park CD with a up-side-down and backwards baseball cap on and a wife beater on with stings as arms and many fake chains around you neck, making a High pitched whistle sound to impressed the 14 year old H.S. freshmen walking home from School. If this is all you want,n then By all means do it. BUT you dump the air. The car does not know this, so you have WAY less air in the engine, but you car dumps fule based on the value it read, and you get a MAJOR bog and black smoke of raw fuel beingh dumped into teh engine. Not good at all, fauls the plugs, and makes the car run like ****.


Run a VPC, and you can vent, or a stand alone, that is all.

 

LMFAO that was the funniest thing I've read today, yet it is sooooo true! That seriously made me laugh cause I see those honda guys doing it all the time.

 

In this case I think it is better that I go with the Forge valve. However I have heard of quite a few guys on here running the HKS SSQ BOV with the recirc kit with no problems at all. If the forge out performs it though and is cheaper its a wonder why people didn't go with that one.

 

HKS doesnt make bad ****... period.... therefore.... their ssq bov is good... i got it... it definately runs better when running high boost.... but i got mine venting just bcuz i want it loud til winter time than im goin recirc... its not to impress others... i just love the sound =)... mine doesnt stall... just every once in a while when i come to complete stop bogs lil bit under 1k than goes back up... my shifting became less smoother too at half or less throttle..but at full throttle its smoother than before =)

 

umiami80 : That was about freakin' hilarious

Finally someone who agrees with what I've saying about the HKS!
I never had one, but with the test result SCC got from it, I wouldn't go near it. The adjusted it to the softest setting and the thnig still surged when the throttle closed. More than any other valve in the test.

 

i have the ssbov with the recirc kit...it works great! check it

https://www.evolutionm.net/forums/sh...threadid=27789

-shahul

 

I wonder how many people here would even know if their bov was working correctly or not. There are a lot of turbo noobs on the board that will buy for name alone. I don't think I'll be replacing my bov unless I'm upping the boost or seeing REAL signs it is failing (not holding boost). If that happens, it will probably be with the Forge.

 

If you vent into the atmoshpere, everytime you shift, you cause damage to your engine. One day you will have so much fuel dumped into your engine, as you will be running 20+ pounds some day to 7500RPMS, and your rings will finally say "****-IT" and will lose their seal from being soeaked in gasoline and then your boost will blow right on by and pressurize your oil pan and blow oil right on out the dipstick all over the motor, oh and your compression will suffer and fall off far sooner then normal, but hey it sounds cool. You runin your plugs too, then your car will start missing, and more fule will go unburnt, and the cycle continues.

I had a SSQBOV, never worked right. Maybe if you put in a weaker spring, either way I will go with a modified 1G when the time comes, but you really don't need a BOV untill you upgrade your IC piping. Even then you lose about 3HP, if you try to run 25PSI on the stocker then it is a different, but your not there yet.

 

hks all day long

 

I agree, who cares how cool it sounds, if it hurts your engine why would you vent it to the atmoshpere? Seriously...

 

HKS is TOP NOTCH quality, but the spring is too tight and does not release the boost pressure unless you build full boost and let off, other wise it flutters and causes the car to run like ****.

 

I just had a blitz bov installed. I was gonna go w/ hks but heard bad reviews. Was about to get apexi but a guy who works for apexi in the operations department said it's not that good. He recommended blitz bov. blitz's look good sounds good(little loud w/ out sus filter which comes with it) and work great.

 

No offense Chris, but your a dumbass. HKS doesn't care about your car, they care about your money. You vent into the atmosphere, car runs like ****, and you **** up the engine progressively, this is true on all MAF systems, this issue has been discussed forever, and you can't do it, bad for the car, will **** it up.