i have a turbo b18b running at 6 psi, when ever the car is idleing and i rec it up my BOV wont blow off, also on my boost/vac gauge the arrow wont go into the boost side, when i drive the car the BOV wont blow off either, it is a greddy type rs BOV, thanks

 

honda's dont build boost when you rev it up in netural. (no comment)

if it doesnt blow off when you drive, are you sure that its hooked up in the right spot?

 

i have the top vaccume hose tapped into my brake booster line, i hear a fluttering nose, when i shift not the BOV noise, do other cars build boost when u rev up in nuetral

 

anyone

 

Are you watching the boost gauge when you're driving around? I'm having the same problem with the same BOV, but i dont think my problem is from the BOV but i could be wrong. Make sure you're atleast getting boost when driving.

 

maybe your bov is set too hard. try hooking up your vaccum line to some other vaccum source on the intake manifold,and check your intercooler clamps and all your pipe clamps to make sure they are all tight.

 

TURN UP THE BOOST!!! Jj/k adjust it....it takes a few turns or so to get it to sound good.

 

all i know is if the blow off valve isn't working like you say, and then you here the flutter noise.....STOP DRIVING IT TILL YOU FIND THE PROBLEM!!!!

the flutter is the excess boost that didn't go through the blow off valve and recirculated throw the turbo. if you keep driving like this your going to mess up the motor and turbo REALLY FAST! did you buy the bov from ebay?

 

check for leaks, maybe try a different vac source

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg hatched &raquo;</TD></TR><TR><TD CLASS="quote">all i know is if the blow off valve isn't working like you say, and then you here the flutter noise.....STOP DRIVING IT TILL YOU FIND THE PROBLEM!!!!

the flutter is the excess boost that didn't go through the blow off valve and recirculated throw the turbo. if you keep driving like this your going to mess up the motor and turbo REALLY FAST! did you buy the bov from ebay? </TD></TR></TABLE>

what he said is kind of correct. u dont have to stop driving it. IT IS IN NO WAY GOING TO MESS UP THE MOTOR OR TURBO "REALLY FAST."

fluttering mean that the bov is too tight. when its too tight it flutters, meaning the piston in the BOV is pushed up, but the air isnt pushing enough to hold it up, therefore causin it to flutter. if you loosen it too much then u dont hear the bov release air "ricer boy bov."

it takes a few tries to get it right in between.

 

is it tial?

 

Sure some cars can, but they have relatively small turbos. ie: stock cars like, an evo, sti, srt4 could blow off in neutral sure, but there turbos are not like the mass ones we like to put on our hondas.

I've seen ppl with greddy kits that could build boost in neutral too.

Do u actually read 6psi on ur gauge while ur driving it? I kno my hks doens't like to make its signature chirp unless i hit about 5-6lbs.

 

it does red 6 psi while driving, i have tryed too loosen the swrew on to, the flutter goes away but u can hear the BOV, the vaccume source is the brake booster, i have checked and there are no boost leaks

 

hmmm...my rs kinda flutters at low rpms when i shift. that means that's set on too hard? or what? it was doing that when i had my type s. then again, my turbo was working correctly when i had my s on. lol

 

its a little tight im guessing. i had a type S before and it never fluttered on me.

just b/c it flutters does not mean anything is wrong. str4s w/ bovs flutter a lot too, but there is no problem.

 

i loosened mine and now it wont blow off at all

 

i would try another vaccum source. you might have a boost leak.

 

what other vac source can i use

 

you're already using the brake booster line? you could try using your fpr?

 

i have my boost gauge tapped to my fpr line, can i still do it

 

Uhh, guys, I think the point is kinda being missed here.

We don't have BOVs on our cars to make cool sounds, we have them because they dump pressure that can potentially backspin your turbo charger.

Before addressing the issue, I'd like to clear up some previous misinformation in this thread:

Having no BOV will NEVER destroy your MOTOR. It will destroy your turbocharger, and only if it is a standard bearing turbo, BB turbos won't have any problem with this, rally teams even tune for a certain amount of charge pipe pressure.

Now, with that said, onto the question at hand:

Firstly, many (most) cars will not blow off in neutral. Neutral means no load on the motor, no load on the motor means no boost, which means no air to dump through the valve.

Second: Using the "sound" of the BOV to accurately determine whether it is actually functioning is extremely poor, especially if you're only running 6psi and a BOV that is designed to properly vent air at MUCH higher airflow and boost levels.

If a BOV is adjusted properly to hold your peak boost, when driving part throttle, it should flutter, because it's "too tight" for the condition at hand.

You can't use sound to accurately diagnose a bov. If you think it isn't working, pull it off the car, and push the piston, if it moves, then chances are that it will open when it should.

I always use my FPR vacuum for my boost tap because its always accurate, and well, if its not, then the BOV is the least of your worries.

Loud BOVs are cool, no question, but form must follow function.

Hope that helps,
Zak

 

so i shouldnt hear a BOV sound

 

its not that we are missing the point. Not all Bov are going to have this big ol woosh that everyone is talking about. Like still good is saying you can run without a bov it wont destroy your engine but it will kill your turbo. I am pretty sure we know how the bov works. I myself if i remember t'ed my line to a vaccum source on the manifold. On my ZC above the IaCV i think is what it is called used one of the vaccum lines on there. If you want to find a vaccum source just start your car and when you give your vehicle more throttle put your fingers over on the holes and which ever one sucks is the source i would use.