3.3TT Is BOV upgrade necessary?

[xot1]

Hello

With my current setup (JB4 + WMI + Primary DP ~480whp), it is not rare to hit 19psi during a pull.

Are the stock BOVs able to handle that much boost?

Is an aftermarket BOV a necessary upgrade for reliability?

I do not care about sound and I actually would be using a recirculating type for the quietness but I wonder about the worth of this upgrade. (The model I was looking at is the TurboXS dual BOV which costs 440 bucks)

Any opinions?

 

[YOWStinger]

Can’t answer the need, but we have MAP sensors not MAF sensors, so recirculating or not, doesn’t really matter. If you’re feeling like your boost is getting cut and you’re feeling lag between shifts, that might mean you need an upgrade. I’ve always been on the fence about this, I’ve never replaced my stock BOV/BPV’s (and I’ve had a lot of them) and that’s never been my pinch point. That being said, I’ve never owned a Stinger before.

 

[WildBill]

Is your boost hitting your target in the logs, If so I'd say that you are okay.
Unless you are not hitting your target values it is pretty much for show (or the sound)

 

[DaJackson]

No one has proven that different BOVs provide a benefit at this point.

 

[Hydrajin]

100% necessary, stock valves are always no good, upgrade because aluminum>plastic.

No seriously, all jokes aside. For pressure, plastic stock valves will handle more than the engine will. Aftermarket valves do have 1 advantage though, even on a stock setup, they seal better allowing you to build up boost faster, the issue with stock valves is they are prone to leaking which can hinder spooling to any desired pressure; most respectable aftermarket valves are going to actuate much faster and seal better than stock valves. I haven't tested the stock stinger valves on a bench but I do not see why they would be as good as aftermarket valves in actuation and seal given they probably cut costs to produce these parts, aftermarket from the big competitive brands are manufactured with no costs spared; quality over quantity with aftermarket valves.
I'm running hks ssqv4s on my otherwise stock stinger, because I had 1 lying around, I also have a gfb response which I think performs better than the ssqv4 but the only flange available at the time was the hks so I bought a second valve and mounted them for a slight reduction in spool up. They really come into play when paired with a free flowing turbo back exhaust.

 

[basysmith]

No

 

[Angel]

No you don't need them.

They wont hurt anything if you decide to get them. If you had a big turbo set up then I would say for peace of mind then get them. Aluminum BOV/ Aftermarket are made to higher quality than the plastic oem ones. This is not to say that the OEM wont work properly, they do.

I had BOV and sold them and went back to stock. I will be getting a set of BOV GFB, but only after I get an intercooler.

To answer your question NO you don't need them, but YES if you want them.

 

[YOWStinger]

Just for comparison, a regulation FIFA soccer ball must be inflated to 11.6psi, the valves in your BPV are slightly more engineered than a valve on a soccer ball, 19psi isn't going to freak them out.

 

[DaJackson]

Just for comparison, a regulation FIFA soccer ball must be inflated to 11.6psi, the valves in your BPV are slightly more engineered than a valve on a soccer ball, 19psi isn't going to freak them out.

Yeah that’s a terrible comparison. The “valve” on a soccer ball is mechanical and not electric and doesn’t have to move 100s/1000s of times per hour.

 

[YOWStinger]

Yeah that’s a terrible comparison. The “valve” on a soccer ball is mechanical and not electric and doesn’t have to move 100s/1000s of times per hour.

If you want to improve the responsiveness of your BPV, then sure, upgrade it, the question is "can the stock BPV handle 19# of boost without leaking or blowing up"

 

[Hydrajin]

Yeah that’s a terrible comparison. The “valve” on a soccer ball is mechanical and not electric and doesn’t have to move 100s/1000s of times per hour.

Bypass valves are not electronic on the stinger, they are mechanical using differential pressure to operate, hence the ridiculously fast response times compared to a signal system in electronic valves.

However as I have stated above, the actuation is slower than it could be on the stock valves because cost is a concern when manufacturing a car as a whole; same reason why intake and exhaust upgrades produced power on this car, they are built using more expensive processes that just don't cut it for the mass production of Kia.

 

[KingLamoni]

100% necessary, stock valves are always no good, upgrade because aluminum>plastic.

No seriously, all jokes aside. For pressure, plastic stock valves will handle more than the engine will. Aftermarket valves do have 1 advantage though, even on a stock setup, they seal better allowing you to build up boost faster, the issue with stock valves is they are prone to leaking which can hinder spooling to any desired pressure; most respectable aftermarket valves are going to actuate much faster and seal better than stock valves. I haven't tested the stock stinger valves on a bench but I do not see why they would be as good as aftermarket valves in actuation and seal given they probably cut costs to produce these parts, aftermarket from the big competitive brands are manufactured with no costs spared; quality over quantity with aftermarket valves.
I'm running hks ssqv4s on my otherwise stock stinger, because I had 1 lying around, I also have a gfb response which I think performs better than the ssqv4 but the only flange available at the time was the hks so I bought a second valve and mounted them for a slight reduction in spool up. They really come into play when paired with a free flowing turbo back exhaust.

Thanks for you post. It helped me with my decision. I was leaning towards the GFB response and your post sold me.

 

[Hydrajin]

Thanks for you post. It helped me with my decision. I was leaning towards the GFB response and your post sold me.

Congrats; nice valves those GFBs, very fast and well made. Post a video if you get the chance.

 

[Daniel @ K8 Stinger Store]

Necessary? No, however, they are a great addition to an overall package and highly recommended. A BOV kit can add reinforcement to your engine and you also get the added bonus of a fun sound with certain valve types. Having adjustable valves or pressure adjusted valves allows you to maximize operating ranges. Also, having a BOV that is made with stronger valves than OEM adds some peace of mind and one less thing to worry about down the line. A good example of these systems is GFB BOV Kits ( not yet listed but reach out if interested ) and the HKS Super SQV kit ( FOUND HERE ). If you have any more questions feel free to reach out any time and I would be glad to talk to you about some of the available options and which ones would work best for you.

- Daniel

 

[KingLamoni]

The GFB Response TMS BOVs arrived today. They look very well built. Just not sure yet when to run them as recirculating vs vent to atmosphere

 

[Manchuz]

The GFB Response TMS BOVs arrived today. They look very well built. Just not sure yet when to run them as recirculating vs vent to atmosphere

I have mine set at 50/50.

 

[Oryan]

I have no reason to believe the stock valves won't at least hold boost. If they were that crappy we'd be finding out by now. That being said...They could be faster. I've yet to prove it but I wouldn't be surprised if the stockers also have a tendency to leak by a little, and we would have a hard time noticing because they just recirculate anyway. Either way mine are getting replaced.

 

[KingLamoni]

I found that to install the GFB Response TMS BOVs I have to rig a bracket to move the SXTH dual catch can GT sign out of the way. The new BOV won't fit in place of the driver's side stock BOV.

 

[KingLamoni]

Ok I had some nice Stainless Steel laying around and made an extension for the SXTH Dual Catch Can which moved the front bracket with the GT logo up about 1.5 inches, giving plenty of room to install the GFB Response TMS BOVs. I'll post some pictures of this later today.

 

[KingLamoni]

Hello

With my current setup (JB4 + WMI + Primary DP ~480whp), it is not rare to hit 19psi during a pull.

Are the stock BOVs able to handle that much boost?

Is an aftermarket BOV a necessary upgrade for reliability?

I do not care about sound and I actually would be using a recirculating type for the quietness but I wonder about the worth of this upgrade. (The model I was looking at is the TurboXS dual BOV which costs 440 bucks)

Any opinions?

Now that I have the GFB Response TMS BOVs installed, I think I can comment now to your question. I have them set for recirculating and throttle response is supposed to be 30%. Can I tell the difference.... that's another question.

My understanding is limited. I'm still learning about turbocharged vehicles. Tomorrow I'm getting the car dyno'd to establish a baseline. Except for the BOV everything is stock. It's only a 20 minute job to reinstall the factory BOVs but I'm going to leave these on for now. I think I'll see the difference when the exhaust is upgrade. I've read with less restriction on the exhaust the larger BOV allows more air to pass. I can hear the air recirculating with the new BOV and with the factory I could not hear them.
I wonder if someone who knows more than me can explain why I can hear it now? My BOVs are adjustable but I left them the way they come shipped.