GoFastBits BOV Kits - 5 options explained - Sound Clip - KHARTUNERZ

[Thwack]

I have a pair and have no problem with them at all. I can't even tell you how far the screw is because I didn't have to touch it, setting was fine out of the box. The pistons inside the valve should be able to be pushed in with your thumbs fairly easily, maybe about 3-5 lbs of pressure? If the're not actuating at all under any setting, and the pistons are able to move, i'd say the problem is with the vacuum line from the throttle body, they may have kinked or blocked it somehow and the pressure is not getting through. good luck.

 

[turboAWD]

Would kit 1 (just better BOV) also result in 30% faster re-spool? Or is that benefit limited to the "Respons" valves? They were the ones mentioned in the write-up. Don't really care for blow-off sound, but am always interested in upgrades..

 

[KingLamoni]

Other than noise, what’s the gain here?

https://gfb.com.au/products/blow-off-and-diverter-valves/respons-tms/
Here is the answer to your question. Look at the chart a couple of paragraphs in that talks about a 30% gain in turbo response or something like that.

I have the TMS Respons BOVs. I left them as they came, which is fully recirculating as I understand it. I want to thank Khartunerz for carrying the GFB line. Can't wait to see more from GFB and Khartunerz for my Stinger. I also got my steel braided brake lines from Khartunerz. Very fast shipping.
So here is a video I did yesterday. The GFB BOVs is the only performance mod in my Stinger to date. That is soon changing with a JT 520hp kit minus the Uncle Chip. The LAP3 Pro-Tuner arrives very soon and I have the HKS plugs ready to install.

Enjoy!

 

[Hockster]

Is there any downside to going full recirculating? I don't want my car sounding like a Subaru driven by a 16 year old kid.

 

[sym]

I don't see the point in replacing the factory recirculation valves with these in full recirculation mode.

For reference I have the twin Deceptor kit (electronically adjustable 0-100% recirculation) and I like them a lot. You can definitely feel that the car responds more smoothly to throttle closure. I was getting some turbo flutter on the stock valves and these eliminated it. I switch it to full recirculation for spirited driving.

In full atmospheric mode (and with SSR intakes) both the turbo spool up and the blow off acoustics are classy.

 

[KingLamoni]

I don't see the point in replacing the factory recirculation valves with these in full recirculation mode.

For reference I have the twin Deceptor kit (electronically adjustable 0-100% recirculation) and I like them a lot. You can definitely feel that the car responds more smoothly to throttle closure. I was getting some turbo flutter on the stock valves and these eliminated it. I switch it to full recirculation for spirited driving.

In full atmospheric mode (and with SSR intakes) both the turbo spool up and the blow off acoustics are classy.

I'm upgrading to JT 520hp kit (minus the Uncle Chip) and putting in a LAP3 Pro-Tuner very soon. Possibly a turbo upgrade. So the factory BOVs would be a bottleneck in the system. If I was leaving it stock I wouldn't see a need for it.

 

[Hapa88]

better throttle response
Faster boost recovery on gearshift

This is true on manual transmission cars where you lift the throttle for each shift but this is NOT true on an automatic car as the throttle body plate remains open through the shifts.

 

[DaBears4Lyfe]

This is true on manual transmission cars where you lift the throttle for each shift but this is NOT true on an automatic car as the throttle body plate remains open through the shifts.

Lol you obviously havent data logged the throttle position a kia stinger yet. You get plenty of throttle closure during shifts.

 

[Hapa88]

Lol you obviously havent data logged the throttle position a kia stinger yet. You get plenty of throttle closure during shifts.

If that is true, how come you don’t hear any blowoff sounds on any of the shifts in videos like this one?

You would expect it to sound more like this if the bypass/blow off valve is actually doing anything between shifts.

 

[KingLamoni]

So even with it fully recirculating there was swooshing sound. That's been my experience.

 

[sym]

So even with it fully recirculating there was swooshing sound. That's been my experience.

It's some of the high pressure air escaping back through the air filters rather than through the BOVs. The sound from that will depend on what intakes you are running. I hardly hear it on my SSR intakes on full recirc mode, but it was quite loud on my Stillen ones.

 

[Hockster]

Can't remember if this was posted here or not, but I'd do this. For a day anyway.

 

[CoconutRob]

Would kit 1 (just better BOV) also result in 30% faster re-spool? Or is that benefit limited to the "Respons" valves? They were the ones mentioned in the write-up. Don't really care for blow-off sound, but am always interested in upgrades..

I would like to know also, does anybody have an answer for this?

 

[Hapa88]

better throttle response
Faster boost recovery on gearshift

This is true on manual transmission cars where you lift the throttle for each shift but this is NOT true on an automatic car as the throttle body plate remains open through the shifts.

Lol you obviously havent data logged the throttle position a kia stinger yet. You get plenty of throttle closure during shifts.

DaBears4Lyfe was right, I haven't data logged the throttle position on a Kia Stinger before that point and was going off of videos and automotive experience.

That lead me to decide to verify for myself by taking some data logs and I'm posting the results here. I used my BlueDriver Bluetooth OBDII Reader to log Speed, Engine RPM (so you can see the shift), Boost Pressure, Commanded Throttle Position (gas pedal position), and the actual Throttle body position.

As you'll see in the data, there is there is absolutely NO throttle closure during shifts in my 2019 Kia Stinger GT1 that I drove. I have over a dozen runs logged and none of them show any throttle body closures. This is further evidenced by the fact that Boost pressure remains constant through the shift (hence, no blow off sound).

Run 1 was from a dead stop. Wide Open Throttle (WOT) all the way to 90mph. Car was in Sport mode, traction control was still on and was in standard automatic shifting. Note the boost and throttle position remain constant during the acceleration period. Boost pressure finally drops once I let off on the gas.

Run 2 was from a dead stop. Also WOT all the way to the end except I was in Sport mode with Manual shifting. I manually shifted before the redline as you can see the 5 shifts I did by looking at the engine RPM drops. Note the boost and throttle position remain constant.

Run 3 was from about a 35mph roll in 5th gear, manual mode, and gunning it to build boost then manually shifting. Note the boost and throttle position remain constant through the shifts.

Bottom line, on a automatic car like ours, unless the stock valve is leaking, you won't see any benefit in an upgraded one during shifts, as the valve remains closed the whole time.

 

[KingLamoni]

DaBears4Lyfe was right, I haven't data logged the throttle position on a Kia Stinger before that point and was going off of videos and automotive experience.

That lead me to decide to verify for myself by taking some data logs and I'm posting the results here. I used my BlueDriver Bluetooth OBDII Reader to log Speed, Engine RPM (so you can see the shift), Boost Pressure, Commanded Throttle Position (gas pedal position), and the actual Throttle body position.

As you'll see in the data, there is there is absolutely NO throttle closure during shifts in my 2019 Kia Stinger GT1 that I drove. I have over a dozen runs logged and none of them show any throttle body closures. This is further evidenced by the fact that Boost pressure remains constant through the shift (hence, no blow off sound).

Run 1 was from a dead stop. Wide Open Throttle (WOT) all the way to 90mph. Car was in Sport mode, traction control was still on and was in standard automatic shifting. Note the boost and throttle position remain constant during the acceleration period. Boost pressure finally drops once I let off on the gas.

Run 2 was from a dead stop. Also WOT all the way to the end except I was in Sport mode with Manual shifting. I manually shifted before the redline as you can see the 5 shifts I did by looking at the engine RPM drops. Note the boost and throttle position remain constant.

Run 3 was from about a 35mph roll in 5th gear, manual mode, and gunning it to build boost then manually shifting. Note the boost and throttle position remain constant through the shifts.

Bottom line, on a automatic car like ours, unless the stock valve is leaking, you won't see any benefit in an upgraded one during shifts, as the valve remains closed the whole time.

What mods do you have now?

 

[Hapa88]

What mods do you have now?

Stock... well modified factory airboxes.

 

[KingLamoni]

Stock... well modified factory airboxes.

So you improved on the intake part of the air boxes? The intake is very restrictive.

 

[DaBears4Lyfe]

DaBears4Lyfe was right, I haven't data logged the throttle position on a Kia Stinger before that point and was going off of videos and automotive experience.

That lead me to decide to verify for myself by taking some data logs and I'm posting the results here. I used my BlueDriver Bluetooth OBDII Reader to log Speed, Engine RPM (so you can see the shift), Boost Pressure, Commanded Throttle Position (gas pedal position), and the actual Throttle body position.

As you'll see in the data, there is there is absolutely NO throttle closure during shifts in my 2019 Kia Stinger GT1 that I drove. I have over a dozen runs logged and none of them show any throttle body closures. This is further evidenced by the fact that Boost pressure remains constant through the shift (hence, no blow off sound).

Run 1 was from a dead stop. Wide Open Throttle (WOT) all the way to 90mph. Car was in Sport mode, traction control was still on and was in standard automatic shifting. Note the boost and throttle position remain constant during the acceleration period. Boost pressure finally drops once I let off on the gas.

Run 2 was from a dead stop. Also WOT all the way to the end except I was in Sport mode with Manual shifting. I manually shifted before the redline as you can see the 5 shifts I did by looking at the engine RPM drops. Note the boost and throttle position remain constant.

Run 3 was from about a 35mph roll in 5th gear, manual mode, and gunning it to build boost then manually shifting. Note the boost and throttle position remain constant through the shifts.

Bottom line, on a automatic car like ours, unless the stock valve is leaking, you won't see any benefit in an upgraded one during shifts, as the valve remains closed the whole time.

Sorry I guess I should have mentioned on modified cars. Stock cars are completely fine. Cars pushing 400, 450+ have issues.

 

[Hapa88]

Sorry I guess I should have mentioned on modified cars. Stock cars are completely fine. Cars pushing 400, 450+ have issues.

If you're running a JB4 or other piggy back unit, the throttle plate won't close in those either during shifts, so again it wouldn't matter.

 

[DaBears4Lyfe]

If you're running a JB4 or other piggy back unit, the throttle plate won't close in those either during shifts, so again it wouldn't matter.

Dude you have no idea. Yes I do have a jb4 and ran full bolt ons. There is throttle closure @Tonkabob I'm sure has logs of his aswell. I dont have any logs as I just got another jb4 after removing my old one.