[iam_canadian22]

I like the sound too... but to hear it EVERY TIME you back out of the throttle? no thanks, dual port for me!

Same thing i would do, turbosmart kompact dual port

Sent from my SM-G981W using Tapatalk

 

[gSwift]

I saw this discussed in a older thread but didn't want to bring it back to life since this one was current. I just installed my EVO BOV and now when cruising around and a slow steady pace, you hear air releasing constantly. All connections are tight and when you punch the throttle it blows off like I would expect it to work.

I've owned turbo cars with BOV's before but I've never heard the air rushing out like on this. The other thread said EVO said this was normal but it doesn't seem normal to me, at least not with the automotive turbo cars I've had. I do have 2 other springs that came with it, will that fix it?

Here is the thread

blow-off valve problem.... EVP.....

Quick background--- we bought a new 2020 X3 120hp and in the last few months have been doing upgrades: intercooler, shocker cat delete pipe, EVP magnum muffler, 3R tune, bigger fuel pump, EVO silicone intake tubes with, of course, the blow-off valve. I left the BOV at the stock adjustment on...

www.maverickforums.net

 

[Cascade Crush]

Did you connect the boost reference line?

 

[gSwift]

Did you connect the boost reference line?

Not real familiar with which line is which just yet, but it's installed just like EVO instructs. If you're referring to the port that bolts into the manifold and plumbs into the bottom of the BOV then yes, it's connected.

Its literally doing the same thing the guy in the other threads machine is doing

 

[Cascade Crush]

Not real familiar with which line is which just yet, but it's installed just like EVO instructs. If you're referring to the port that bolts into the manifold and plumbs into the bottom of the BOV then yes, it's connected.

Its literally doing the same thing the guy in the other threads machine is doing

Did you read the explanations in that thread? They are accurate and correct. The BOV releases charge pressure when it exceeds manifold pressure by a predetermined amount. The reference line feeds manifold pressure into the top of the BOV. 5k RPM cruising speed has a neutral manifold pressure which is why the BOV is venting.

 

[2020RR]

Sounds like you need to use a spring with more initial pressure to keep the BOV closed during light throttle. You could try "shimming" the spring and see if that changes it or try a different spring. Have you tired adjusting the BOV? by turning the top cap? My Turbosmart does not do that (or i can't hear it) and is adjustable on how hard it blows off.

 

[gSwift]

Did you read the explanations in that thread? They are accurate and correct. The BOV releases charge pressure when it exceeds manifold pressure by a predetermined amount. The reference line feeds manifold pressure into the top of the BOV. 5k RPM cruising speed has a neutral manifold pressure which is why the BOV is venting.

I read the thread but never saw the OP report back on if he got the problem resolved or not.

 

[gSwift]

Sounds like you need to use a spring with more initial pressure to keep the BOV closed during light throttle. You could try "shimming" the spring and see if that changes it or try a different spring. Have you tired adjusting the BOV? by turning the top cap? My Turbosmart does not do that (or i can't hear it) and is adjustable on how hard it blows off.

Yeah it came with 2 different springs in the kit but there was ZERO information regarding the springs or which is stiffer between the 2. As for adjusting it, I haven't played around with that yet but we are riding tomorrow so i'll play around with it little by little. If its normal then I can live with it, but like I said thats not normal behavior on BOV's for any of my turbo cars, so I just wanted to consult you guys and confirm.

 

[2020RR]

Should be able to tell a stiffer spring by compressing them with your fingers/palm, easy enough. You should be able to adjust the top cap by turning it clockwise (compressing the spring more), which should keep the valve closed longer and blow off later and stronger.

 

[gSwift]

Should be able to tell a stiffer spring by compressing them with your fingers/palm, easy enough. You should be able to adjust the top cap by turning it clockwise (compressing the spring more), which should keep the valve closed longer and blow off later and stronger.

Thanks, i'll give that a shot

 

[Cascade Crush]

They come with the strongest spring installed.

 

[gSwift]

They come with the strongest spring installed.

If thats the case then i'll just tighten it all the way up and call it a day. Thanks Crush

 

[Sandman_73]

Its just how the EVO BOVs are. All the way tight mine would always bleed air at low speed on my old car. Gets old really quick. Going with a recirc setup on new car.

 

[Cascade Crush]

I went through the same thing with a RPM brand BOV and swapped it out to the Evo BRV. I looked at the Turbo Smart but in the end I think the BRV is a better solution.

 

[ralphbxo]

If I’m running a stock Turbo RR and plan on eventually upgrading the turbo. Would there be any downsides to upgrading to a 50mm Tial BOV rather than a 25mm Evo or Rpm BOV before I do the turbo upgrade?

 

[JtX3]

Yea the BOV sounds cool but dang it gets annoying I’m to the point of almost taking it off. Mine is a RPM Bov and it’s loud as crap

 

[SideXEach]

Dyno Jet BOV is quite quiet. Not very noticable at all from the drivers seat.

 

[HPnMORE4J]

@Hollywood X3
Did you ever put a BOV with the stage 3?

 

[Hollywood X3]

@Hollywood X3
Did you ever put a BOV with the stage 3?

Nope.

 

[HPnMORE4J]

Nope.

I didn't think so.

I don't either, I do a lot of hard on/off and constantly hearing what sounds like a BOV wondering if it's putting too much pressure on that gate/bearing.....