BOV not working correctly

[troyweaver]

I have a 2gen eclipse gst with 4g63 motor (Stock). Auto trans. It has a hard pipe kit on the turbo and my BOV connects on top of that tube. There are hose clamps and rubber hose holding the BOV to the hard pipe. When I really get on it and build a lot of boost my BOV actually blows off the tube and the car chokes itself out because its getting to much air. I am unsure if the BOV is not working properly or if the hose clamps aren't strong enough to hold the BOV to the hard pipe kit?
I have checked the clamps and they dont seem to be coming loose. Just wondering if anyone has had this problem before I spend money on a new BOV to see if that fixes the problem. To my knowledge the car is stock besides the hard pipe kit for the turbo. Any help would be great.

 

[screamingdemon]

By hard pipe kit you mean hard intake piping? So I take it you've still got the plastic intercooler piping and crappy factory bov? Can you post a pic of your engine bay so we can get a better idea what you're working with. Either way you look at it you need a better BOV than the stock 2G one.

 

[troyweaver]

Yes it is an intake pipe kit. I have had no problems with the BOV when I am not hard on the car but when I build a lot of boost to pass someone or make a yellow light it has came off so I dont think the hose clamps are the problem. I might just get a new BOV but I didnt know what to get since im running all stock motor and everything. Ill Try to take a picture of the bay. I do know I need to get a bigger turbo or at least one that spools slower because the turbo on it now spools like a light switch there is no middle of the road with it. Either crazy boost or none.

 

[DUOeclipse]

If you do indeed have the black stock bov, it would be best to get rid of it. It's nortorious for leaking. The 1g bov can handle up to 22psi of boost. They're easy to find, and I've seen them going for around $25 - $30 for a used one. You will have to get the flange for it to fit your icp.

 

[Robzone0911]

I have a 2gen eclipse gst with 4g63 motor (Stock). Auto trans. It has a hard pipe kit on the turbo and my BOV connects on top of that tube. There are hose clamps and rubber hose holding the BOV to the hard pipe. When I really get on it and build a lot of boost my BOV actually blows off the tube and the car chokes itself out because its getting to much air. I am unsure if the BOV is not working properly or if the hose clamps aren't strong enough to hold the BOV to the hard pipe kit?
I have checked the clamps and they dont seem to be coming loose. Just wondering if anyone has had this problem before I spend money on a new BOV to see if that fixes the problem. To my knowledge the car is stock besides the hard pipe kit for the turbo. Any help would be great.

were do you have the vac line for the BOV hooked up to??

 

[troyweaver]

the car doesn't have an inter-cooler. But it is the stock crappy BOV. I wanted to get one that would be rather loud once I switched the car over to 5spd. I'm not sure where the vacuum lines run to off the BOV I'll have to look tomorrow.

What kind of BOV should I buy. I heard Tial are the way to go. but what size?

 

[Robzone0911]

the car doesn't have an inter-cooler. But it is the stock crappy BOV. I wanted to get one that would be rather loud once I switched the car over to 5spd. I'm not sure where the vacuum lines run to off the BOV I'll have to look tomorrow.

What kind of BOV should I buy. I heard Tial are the way to go. but what size?

Just make sure the vac line goes to the intake manifold after the throttle body, if you have to change it then do so and try again.

 

[Alan11]

the car doesn't have an inter-cooler. But it is the stock crappy BOV. I wanted to get one that would be rather loud once I switched the car over to 5spd. I'm not sure where the vacuum lines run to off the BOV I'll have to look tomorrow.

What kind of BOV should I buy. I heard Tial are the way to go. but what size?

BLT first. The most probable cause you are having problems when you push throttle is because there is a boost leak. Most probalble the stock BOV.
Your car does hava an Intercooler its called a sidemount intercooler, its under you passanger fender.

If un the future you decide to get another BOV dont go for sounds go for best performance.

 

[screamingdemon]

If you're on a budget then you can score a 1G BOV for pretty cheap on eBay. Then you can get the adapter. What I did was go with the NGR BOV it holds more boost than the 1G BOV and sounds better. If that's what you going for. But like the others said do a boost leak test.

 

[honda_burner]

Or go with the evo mr (metal) blow off valve. It is as reliable as the 1g but fits just like the stock 2g

 

[delta448]

Post a picture of the engine bay. Your terminology doesn't jive.

 

[rlacasse1]

^^^ Like he said, post a picture.

Here's my take on it though, you do have a intercooler, it's just the stock side mount. I'm assuming you meant you don't have a front mount.

And as for this BOV popping off, it definitely sounds like an issue with the hose/clamp, not a BOV issue. Where the hose goes on do both the piping and BOV have a lip that will prevent the rubber hose from popping off?

And I think it's a clamp issue because you say it's just as the car builds boost. So the pressure is just pushing it off. I don't think it's due to any malfunction on the BOVs part.

 

[troyweaver]

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[007jimmy]

Wow that looks horrible man. I would replace that pipe with a proper flange and get at least a 1g BOV. Where the BOV is clamped to the pipe (the part with the 3 clamps), is the black pipe cut? I am thinking that there is no bead on the end of that pipe to help the clamp stay on. As for the clamp itself T-bolt clamps work the best, the worm clamps you are using are not that great for holding boost.

 

[1Badvan]

As the jimmy said, there should be a beaded lip on there to stop that hose with the bov from popping off. If there isn't one you could have a bead put on it. Without a bead on that pipe you are going to have nothing but problems with that thing popping off all the time.

I would just get yourself a DSM 1G BOV flange and have it welded on to your uicp (upper intercooler pipe) where its attached currently. This way you can bolt a 1G BOV on and not have to worry about that thing popping off at all. Plus a 1G bov is cheap and will serve you well up to about 20-22 psi if you decide to upgrade later on.

 

[troyweaver]

You guys are correct there is no bead on the part of the pipe the BOV clamps onto which makes sense now that it won't stay on. Ill have to find a flange to weld on. Any ideas on what BOV to get ? I don't mind spending money to get something good.

 

[screamingdemon]

You could try this route....

1990 1999 Eclipse Talon 1g Blow Off Valve BOV | eBay

Or you could try this...

Turbo 2 5"Aluminum Flange Pipe 4 Greddy Blow Off Valve | eBay

along with this...

SPECIAL! - Shop NGR

 

[007jimmy]

Troy i also noticed your BOV line has a Tee in it. This is not reccomended and am positive this isnt helping your situation. Run a single line from the intake manifold to the BOV and just run your MBC with the boost source (1g j pipe looks like)and the wastegate nipple.

As for a replacement parts what are your goals for the car? You could get a FMIC kit with a BOV for pretty cheap.

 

[Thungar]

The three clamps are probably your problem I had a problem with the vac line not clamped tigt enough once and it caused my bov to stop working.

 

[1G9S9T7]

Go for the 1g bov. If you want aftermarket, popular ones I've seen are Greddy type RS/RZ or a HKS SSQV4. Go with what works the best though, not the sound. They are all gonna make a loud sound. The ngr type s above is one to consider as well.

 

[DSMbabyy]

if your ballin on a budget just get a ebay bov, if its all stock theyll work fine, I ran a HKS style Bov on a car for a year with no problems. It put down over 450HP and held boost fine until last week when we started pushing 40psi... then it popped ... dont see a need to spend 300$ on a nice greddy or HKS BOV... but its up to you.

I run Greddy or Blitz BOVS on all my turbo projects now. But if your not wanting to spend a ton, ebay will get you buy for a while!

defanitly need a real flange setup... anytime I see 15 hose clamps in that tight of an area I cringe

 

[rlacasse1]

Or just spend $30 on a 1g BOV from the classifieds. Great BOVs for cheap.

 

[troyweaver]

I found a vacuum line diagram and re ran all the lines that were messed up today. I also put in a gauge pillar today and hooked up a boost gauge and it read around 10lbs when I was driving and really got on it. I tightened the hose clamps and it ran much better, still not perfect but I'm confident you guys are correct it needs a bead on there so it doesn't leak. Ill probably drive it for now and baby it and save money to get the Tial BOV when I get the bead put on that pipe. Are there any places to get the flange that you guys were talking about ?