dynomax27

I was just wondering what kind of BOV's you guys have and how loud it was. i have a hks SS but still puttin together my custom turbo kit and want to know how loud mine would be. Im gonna be boosting about 8 psi. i hear that the stock DSM bov is pretty loud and i'm like damn i should of went with that but all well would of saved me a lot of $$ too!!


[Modified by dynomax27, 2:19 PM 10/25/2002]

inspyral

My old school HKS ssq isn't as loud or high-pitched as some BOV's, but I like it.

Hellz99si

I have the HKS SSQBOV and it rules...nice PSST...no too loud but just right

PM-Performance

i got the hks ssq, i havent instaleled the kit yet, but from what I heard frmo my friends they sound bad ***. they are pretty loud too . nice high pitch squeel

B20T

It's not how loud your bov is . IT's how fast your car goes..my bov sux but I don't care..I killed a loud *** bov eclipse who think his bov will scare me what a joke that was. I just laugh when I heard it..All sound no go lol


[Modified by B20T, 11:32 AM 10/25/2002]

MatT3T4

the louder your blow off valve is, the less efficient it is, generally. (you know, unless you have one of those neato electronic rice off valves)

the air is "supposed" to leave the blow off valve with as little obstruction as possible, which means that if it is REALLY loud, the air is having a harder time exiting...and you should probably adjust it

JPowers

I've NEVER heard this before! Do you have any information to back up this claim?

symba

So does that mean that the Turbo xs RFL isn't an efficient BOV? I'm not trying to be a smart ***. I'm truly asking this question cause I have never heard that before

RGAZ

It makes sense.

The purpose of a BOV is to release air pressure so the turbine doesn't slow-down or get smacked with a pressure wave. If the BOV is squeeling or whistling, the air is rushing though a small hole or over a hollow of some kind. That may cause there to be a little backpressure across the BOV that a wide open one wouldn't have.

IS this actually measurable? No way.

Does it make any hell of a difference in car power? No way.

It may take a tiny little bit of wear and tear off your turbo. Almost unmeasurable.

Randy

TheIntegraGuy

I have a GReddy Type-S....I like it...It's loud, and it works.

MatT3T4

It's not that the blow off valve itself isn't efficient...I don't really know of any that aren't, personally. It is just that the user (you), make it inefficient by the way you tune it. I know the GReddy Type-S, but I assume most, if not all blow off valves, are adjustable...? Most people on the streets have them adjusted so that when they engage...they scream/squeek/squeal...however you want to describe it. Well, in order for it to make that noise, you have to have less surface area available for the air to flow past...thereby making it make the sound it does. The less surface area available (the smaller the escape path), the less air will escape. By turning the **** whatever way you have to turn it on your individual blow off valve, in order to widen the path in which the air takes, out of the charge pipe...the better off you are, to a degree.

Ideally, you should be able to hear the air...but it should sound like a huge rush of air...unobstructed. It shouldn't sound like a tiny 95lb Chinese woman sneezing. If you ever take notice, you'll find that most racecars don't have a squealy blow off valve...if you can even hear it over the open downpipes...lol

MatT3T4

Werd. It's not like it's going to make you fast and furious...but it is a good idea to have it set correctly.

SpoolinSol

I believe the way the different blow off valves are constructed effects the way they sound..... At higher boost applications the blow off valve will sound louder because it's venting more protecting your turbo from compressor surge..... I noticed a big difference from 5psi to 8psi on a Greddy Type S, the pitch was a lot louder.... As mentioned there are some blow off valves that are not as loud as others.... I would rather have one that is loud and has a distinctive pitch and know it's working properly.... To each his/her own....

TKBLAZER

haha this topic is funny...i have some friends that want to turbo their car so they can hear the bov ...my buddy just got a 1.8T golf and all he does is make he bov go off...kinda like a ricer trying to do a burnout ;....


wats up matt, long time no see dude. u still work at boeing? also i'm gonna trubo my car soon. is it possible to make the bov valve quiet?

TheIntegraGuy

Yes Nam...Guess who..haha...just recirculate it.

MatT3T4

haha, whats up dude.

yeah, im still working there, but i opened a company too...so if you need parts, hit me up man, i'll hook it up for you.

and yeah, you can adjust you BOV so its relatively quiet, my old type-s was pretty quiet

FredoSP

but of course!!

pelotudo

1G DSM

$55 for the BOV w/ flange, anodhter $16 to get it welded on. Sounds like the HKS SSQ, but not as high pitched and loud. AWESOME sounding, especially @9psi daily.

jB

falcongsr

55? you got ripped off! lol just kidding.

i'll be installing one here shortly. its ugly. but it works! i dont want noise, just functionality. going to do a test fitting with RTV sealant. messy, but should hold modest boost once its dry. if its what i want then i'll jB weld or have a shop weld it.

TKBLAZER

you bastard i'll hopefully be boostin soon. motor is in the works

Cramerox

screw the BOV being loud its all about the OPEN WASTE GATE. i cant even hear my bov wg to loud

turbopanda

i second that You should've heard my HKS wastegate on my little D16Y8 when I used to push 1.6 bar sounded like the engine was screaming in pain.. hehe

Hayasa15

is anybody running the blitz dual drive? how do you like it?

SIXTYdashONE

what BOV, i swear im not turbo...... all motor baby.. i mean all motor maybe