GSROWNSU

Hey guys just wondering because i have heard this a few times from different people. On low boost occurances (7-8 ish psi) is it true that the bov cannot even be heard? I know the bov still works because there is still pressure that needs to be released but can it be heard on such a low boost setting?
Thanks,
Dan

blinx9900

lies, it can be heard @5psi

vtec.dc2

would it depend on design? i though hks works on both low and high boost unlike certain others

blinx9900

dude, they all work on low boost, some better than others.

Azn Kenny

Depends on the bov and design, my friend had an adjustable one (TurboXS I believe) and he could adjust it to make it blow off at 5 psi if he wanted but usually it was set to blow off at 25 psi.

EJ1 wilcox

I can hear my bov release pressure if I let off the gas even before I build boost. Like if I cruise up to about 5 inches of mercury and let off the gas suddenly, I can hear the BOV.

So mine works even before I get positive pressure.

I have a 1st gen DSM bov.

EJ1 wilcox

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Azn Kenny &raquo;</TD></TR><TR><TD CLASS="quote">Depends on the bov and design, my friend had an adjustable one (TurboXS I believe) and he could adjust it to make it blow off at 5 psi if he wanted but usually it was set to blow off at 25 psi.</TD></TR></TABLE>

What? Dude, blow off valves don't "blow off at 25psi", they "blow off" when you let off the gas, doesn't matter how much boost you are running.

lol

SlowReaction

Haha the job of the bov is to release pressure. If you know the thing works at low boost why does it matter if you hear it or not.

JmurGSR98

I'm boosting at only 5 psi and my greddy type rs can definately be heard.

Azn Kenny

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ1 wilcox &raquo;</TD></TR><TR><TD CLASS="quote">What? Dude, blow off valves don't "blow off at 25psi", they "blow off" when you let off the gas, doesn't matter how much boost you are running.

lol</TD></TR></TABLE>

I'm saying when he adjusted his bov it wouldn't blow off as loud for anything under 25 psi, it would still blow off but not as loud.

Monstah

I had a MR2 with a RFL on it (and a small snail)....would blow off at 5" vacuum. hated that thing after a little bit. under vacuum and blowing off makes no sense, but it sure did it.

CivicVX94

it depends on the design and size of the acutal "valve" of the blow off valve...In general-the smaller it is, the louder it'll be and the less it'll flow....the larger it is, the quieter it'll be and the more it'll flow..

slowr6

my greddy type s is loud as **** at 6psi

turb0teg

I trimmed the bottom coil off the BOV spring that makes a flat bottom, it's slightly louder. Only reason I did that is b/c Im running 6 psi and have no plans of any higher, but I could barely hear it.

vladd

mine can be heard at 1 psi, so yes they can be heard at low pressure.

GetawayInMoscow

i hear mine if i only build like 1-2 lbs of boost

2point2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ1 wilcox &raquo;</TD></TR><TR><TD CLASS="quote">I can hear my bov release pressure if I let off the gas even before I build boost. </TD></TR></TABLE>

Same here. And this is on a tial.

A BOV doesnt have to make noise to 'function'. It just has to function.

KeyserSoze

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turb0teg &raquo;</TD></TR><TR><TD CLASS="quote">I trimmed the bottom coil off the BOV spring that makes a flat bottom, it's slightly louder. Only reason I did that is b/c Im running 6 psi and have no plans of any higher, but I could barely hear it.</TD></TR></TABLE>

Ricer.

So sad to see someone worried about not being able to hear their bov @5psi. I would love to have a bov that operates great and makes no noise. No one would know u were boosted.

I got a tial because they are and from what I read were on the quieter side of things. Didn't want a dsm (they work, but are a tad bit ghetto) or a greddy (had one and wanted a bit better quality) so I got the tial. Though I can't hear it my bov cycles at idle and blows off before I build boost like a lot of others on here say. The saving grace is that at WOT in between shifts you cant even hear it because my engine/exhaust are so loud.

Cliffs: False.

downeyballz

i have a greddy type r bov, it ad a stiff spring in t and doesnt blow off at all at lower psi. i hear compresor surge not the bov. not good!

Laserjock

same here. sold the type r and bought a type s

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by downeyballz &raquo;</TD></TR><TR><TD CLASS="quote">i have a greddy type r bov, it ad a stiff spring in t and doesnt blow off at all at lower psi. i hear compresor surge not the bov. not good!</TD></TR></TABLE>

downeyballz

ive heard the type-s and i think it whisles too much, any experince with type rs?

slowr6

Yeah my type s does like to "whistle"

riceball777

you dont even need to build boost for a blow off valve to blow off
my type s alreay has a loud whisle at 5 inhg

blk_EK

sorry to thread jack guys but, can the Turbo XS even fit on a civic?

slowr6

Any bov can fit on a civic. There not made for a certain car.