FL5 HKS SSQV BOV release date

[nattypiso]

Hmmm...is this something I need? I had one of these on my STi. What a glorious auditory experience.

I don’t need it.. but I want it!

My tuner will probably hate me, even though I’ll be buying the recirculating kit lol.

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[egxflash]

Y'all are lying to yourselves if you're around 40 and think you don't need this!

 

[ThunderPigeon]

It's already got a big wing, my might as well make it sound like it has a big wing.

 

[TW00Si]

I need to hear this in person before I buy one. I have a bigger wing to match but got over the loud Apexi exhaust real quick. Luckily was able to soften the tone via tuned map.

 

[FL5ND2]

I get the benefits, what are the potential downsides? thanks!!

 

[blueroadster]

I grew up around the other old school BOV camp...I have always preferred the woosh sound produced by a Tial BOV as compared to the fluttered sound produced by the HKS SSQV.

 

[Toppyjai]

I couldn't wait for the HKS FL5 kit, I installed the FK8 HKS SSQV4 BOV kit into my FL5 instead. There are no problems and no check engine light.

 

[blueroadster]

I installed the FK8 HKS SSQV4 BOV kit, it fits the FL5 with no problems. No check engine light.

Sweet...Intake, BOV and exhaust sounds are nice. My FL5 is producing intake and exhaust sounds that I like so far so a BOV was something that I am considering.

One sound that I really miss from my previous FG2 Civic Si build is the engine growl and uncaged animal sound when using an external wastegate and dump tube when laying on it. I hope to replicate the same on my FL5 while maintaining a sleeper look. Until then, here is a video of my previous FG2 with an external wastegate and dump tube:

 

[ctechauto]

I grew up around the other old school BOV camp...I have always preferred the woosh sound produced by a Tial BOV as compared to the fluttered sound produced by the HKS SSQV.

This is why the Turbosmart Kompact BOV is a popular buy. Its similar to the Tials in its deep woosh/sneeze rather than the fluttery higher pitched SSQV

 

[nattypiso]

I get the benefits, what are the potential downsides? thanks!!

This has been talked about a lot for our platform for years. I’m not too sure about the base or SI models, but downsides is a little bit more significant on the FK8/FL5/DE5 platforms, particularly to due to our smart Bosch ECU’s that have a more sensitive and accurate airflow model. Due to the design of our air intake and location of the MAF sensor, there’s a reason why we have a bypass valve to recirculate the air back into the engine. If you go with a vent to atmosphere route (install the HKS BOV without their return/recirculating kit or any other aftermarket VTA BOV), you’re pretty much adding an unnecessary air leak, and the ECU will think the engine is getting back air that your MAF sensor calculated.. but it’s not, and the ECU won’t compensate for air vented to the atmosphere. Then your engine will still be fed that fuel allocation (injector flow). While you may not experience any issues or CEL’s right off the bat, that doesn’t mean you don’t have any problems. I’m sure you won’t notice it until you actually do some datalogs, but the A/F ratio will be off, and overall isn’t good especially in the long run. I think the ECU also uses the calculated air to aid the wastegate if im not mistaken, which can lead to overboost conditions.

Lots of people say they’re running them with no issues. But it’s just something to think about if you care about the longevity of your Type R. Unless there’s some recent new MAF sensor or technology that allows the ECU to see how much air is lost, you should keep the bypass valve, buy a aftermarket air intake, or incorporate a recirculating kit. Big names like IMW, KTuner, 27won, even Hondata recommends to not to use any BOV’s that vent to atmosphere.

If anyone has info or experience they can chime in, I’m all about learning and more knowledge is welcome! So people can make the right decisions to which ever route people decide to take.

 

[ctechauto]

This has been talked about a lot for our platform for years. I’m not too sure about the base or SI models, but downsides is a little bit more significant on the FK8/FL5/DE5 platforms, particularly to due to our smart Bosch ECU’s that have a more sensitive and accurate airflow model. Due to the design of our air intake and location of the MAF sensor, there’s a reason why we have a bypass valve to recirculate the air back into the engine. If you go with a vent to atmosphere route (install the HKS BOV without their return/recirculating kit or any other aftermarket VTA BOV), you’re pretty much adding an unnecessary air leak, and the ECU will think the engine is getting back air that your MAF sensor calculated.. but it’s not, and the ECU won’t compensate for air vented to the atmosphere. Then your engine will still be fed that fuel allocation (injector flow). While you may not experience any issues or CEL’s right off the bat, that doesn’t mean you don’t have any problems. I’m sure you won’t notice it until you actually do some datalogs, but the A/F ratio will be off, and overall isn’t good especially in the long run. I think the ECU also uses the calculated air to aid the wastegate if im not mistaken, which can lead to overboost conditions.

Lots of people say they’re running them with no issues. But it’s just something to think about if you care about the longevity of your Type R. Unless there’s some recent new MAF sensor or technology that allows the ECU to see how much air is lost, you should keep the bypass valve, buy a aftermarket air intake, or incorporate a recirculating kit. Big names like IMW, KTuner, 27won, even Hondata recommends to not to use any BOV’s that vent to atmosphere.

If anyone has info or experience they can chime in, I’m all about learning and more knowledge is welcome! So people can make the right decisions to which ever route people decide to take.

Datalogged here with a Turbosmart BOV. LTFT, STFT, AFR (obvious rich condition between shifts but thats not alarming), Injector duty cycle, boost target (torque value stategy on the ECU);etc had no negative effects. Adding an aftermarket intake had more revsions in the tune (though still within spec of running an intake without a tune, technically, just revised to optimize the change) than the BOV did. Also a BOV/BPV is always supposed to be closed until you release the throttle. If you're leaking at idle, on throttle situation, the BOV spring is not the right spring or you need to adjust it. Worst that happens here is unmetered air during shifts, which just runs a bit rich (rather go rich than go lean!)

This was all logged, reviewed by Alan Jackson over at EdgeAutosport we're partnered with on COBB platform. The recommendations of "not" to run a BOV is more-so CYA than anything just like cat-less DPs, or doing a "send it" tune.

Take that as you will. There are always an elevated risk of any mod you do. BOVs in general have always been argued on both sides ad-naseum (one could even say it may be fear mongering on one side) on MAF based cars. To be honest, all things considered, modern ECUs, while yes more sensitive - OTOH they have more of their safeguards, algorithms, strategies which would be "safer" than older ECUs and throwing a BOV on that with MAF based cars.

Best practice here though, is if you want the sound, go ahead and do it, but validate and datalog for your specific engine/situation/use case and see if there are any negative affects for you. Trust, but verify.

 

[FL5ND2]

This has been talked about a lot for our platform for years. I’m not too sure about the base or SI models, but downsides is a little bit more significant on the FK8/FL5/DE5 platforms, particularly to due to our smart Bosch ECU’s that have a more sensitive and accurate airflow model. Due to the design of our air intake and location of the MAF sensor, there’s a reason why we have a bypass valve to recirculate the air back into the engine. If you go with a vent to atmosphere route (install the HKS BOV without their return/recirculating kit or any other aftermarket VTA BOV), you’re pretty much adding an unnecessary air leak, and the ECU will think the engine is getting back air that your MAF sensor calculated.. but it’s not, and the ECU won’t compensate for air vented to the atmosphere. Then your engine will still be fed that fuel allocation (injector flow). While you may not experience any issues or CEL’s right off the bat, that doesn’t mean you don’t have any problems. I’m sure you won’t notice it until you actually do some datalogs, but the A/F ratio will be off, and overall isn’t good especially in the long run. I think the ECU also uses the calculated air to aid the wastegate if im not mistaken, which can lead to overboost conditions.

Lots of people say they’re running them with no issues. But it’s just something to think about if you care about the longevity of your Type R. Unless there’s some recent new MAF sensor or technology that allows the ECU to see how much air is lost, you should keep the bypass valve, buy a aftermarket air intake, or incorporate a recirculating kit. Big names like IMW, KTuner, 27won, even Hondata recommends to not to use any BOV’s that vent to atmosphere.

If anyone has info or experience they can chime in, I’m all about learning and more knowledge is welcome! So people can make the right decisions to which ever route people decide to take.

thank you very much, great reply

 

[nattypiso]

thank you very much, great reply

No problem, this is what I just gathered these past few years. If you still want other insights, there’s definitely lots of talk about BOV’s on the older CivicX forum too.

My recommendation is to contact your tuner, or someone who consistently works with multiple FK8/FL5/DE5, like Derek Robinson from IMW. Tuners like him work with these platforms literally everyday, so they should have way more knowledge about this topic compared to me.

 

[egxflash]

This has been talked about a lot for our platform for years. I’m not too sure about the base or SI models, but downsides is a little bit more significant on the FK8/FL5/DE5 platforms, particularly to due to our smart Bosch ECU’s that have a more sensitive and accurate airflow model. Due to the design of our air intake and location of the MAF sensor, there’s a reason why we have a bypass valve to recirculate the air back into the engine. If you go with a vent to atmosphere route (install the HKS BOV without their return/recirculating kit or any other aftermarket VTA BOV), you’re pretty much adding an unnecessary air leak, and the ECU will think the engine is getting back air that your MAF sensor calculated.. but it’s not, and the ECU won’t compensate for air vented to the atmosphere. Then your engine will still be fed that fuel allocation (injector flow). While you may not experience any issues or CEL’s right off the bat, that doesn’t mean you don’t have any problems. I’m sure you won’t notice it until you actually do some datalogs, but the A/F ratio will be off, and overall isn’t good especially in the long run. I think the ECU also uses the calculated air to aid the wastegate if im not mistaken, which can lead to overboost conditions.

Lots of people say they’re running them with no issues. But it’s just something to think about if you care about the longevity of your Type R. Unless there’s some recent new MAF sensor or technology that allows the ECU to see how much air is lost, you should keep the bypass valve, buy a aftermarket air intake, or incorporate a recirculating kit. Big names like IMW, KTuner, 27won, even Hondata recommends to not to use any BOV’s that vent to atmosphere.

If anyone has info or experience they can chime in, I’m all about learning and more knowledge is welcome! So people can make the right decisions to which ever route people decide to take.

I'm pretty sure this kit that's being released at the end of the month has a recirc and isn't vent to atmosphere, thus not subject to the issues you noted above.

 

[nattypiso]

I'm pretty sure this kit that's being released at the end of the month has a recirc and isn't vent to atmosphere, thus not subject to the issues you noted above.

Yes.. I already know that it’s coming with a recirculating kit. HKS already knows it’s needed for this platform since they made one years ago for the FK8, and venting to atmosphere is not acceptable for Japanese vehicle inspections.


Someone requested the downside of a BOV and I’m just simply explaining it the for people that buy the HKS BOV and DO NOT install the recirculating kit. Which some people already have done on the FL5/FK8.

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