27WON Billet BPV Upgrade Now Available for FL5/DE5

[Vlad@27WON]

Hello Folks,

Some time in the making, but our upgraded BPV is out now for the latest gen FL5 & DE5 applications. Scoop it up here for $229.99

We've had this Bypass Valve out for the 1.5T applications for a bit, but the shape of the unit prevented fitment for some 2.0T applications. So, we went back to the drawing board and updated the design to work across a wider range of applications. This new version now includes all 2023+ Type R and 2024+ Type S models.

A few callouts

• Fully recirculating design. No need to worry about fuel wonky trims. This is not a blow-off-valve.
• Internal metal piston (vs rubber). The rubber on the OEM BPV will degrade and rip over time especially when pushing more boost
• Billet Aluminum (we ditch the factory stamped steel construction)
• Works with OEM turbos, both Kuro turbos and any turbo that retains the OEM BPV location
• This is a serviceable part so we'll supply grease to lubricate the internals. Every 15K is recommend.

Any questions, drop them below.

 

[0x1d7]

...I just want my turbo to sound like a 1999 Skyline R34 GTR V-Spec

 

[J_D]

Does it make more sound than OE?

 

[Vlad@27WON]

...I just want my turbo to sound like a 1999 Skyline R34 GTR V-Spec

Sheesh....can't argue with that. Why not a Nismo 400R, though

 

[Vlad@27WON]

Does it make more sound than OE?

To me, honestly no. But several customers report like a crisper sound at operation.

 

[zumbooruk]

I was about to purchase the Boomba Racing BPV.

https://www.boombaracing.com/honda-acura-1-5t-2-0t-3-0t-bypass-valve-bpv/

But I have had good experience with 27WON products, so this might change my mind...

What are the advantages of the 27WON BPV over the Boomba?

 

[Vlad@27WON]

I was about to purchase the Boomba Racing BPV.

https://www.boombaracing.com/honda-acura-1-5t-2-0t-3-0t-bypass-valve-bpv/

But I have had good experience with 27WON products, so this might change my mind...

What are the advantages of the 27WON BPV over the Boomba?

Similar functionality since that is also a fully recirculating valve. I'm not the biggest fan of the location of the metal vacuum fitting since it positions it straight out and doesn't route nice like OEM on that valve, but that is a small nitpick. I also can't speak to how serviceable that Boomba valve is nor do I see any instructions to do so that is a big question mark.

 

[Savannah@TSP]

Was really excited to see this drop for the 2.0T crowd after handling the 1.5T version.
Excellent product, as always.

 

[0x1d7]

I'm not quite understanding the why of these types of products. Yes, it sounds more solid than the Honda OE valve, but the OE valve has a warranty behind it if it fails or somehow contributes damage to the turbo, no? And these 3rd party valves still require maintenance over time, based on what I can glean from the product pages.

Sorry, this is just my ignorance on the whys and what advantage (besides material) it provides.

I mean, unless you can stustustustu the turbo, then I'll pay quadruple ofc.

 

[zumbooruk]

I'm not quite understanding the why of these types of products. Yes, it sounds more solid than the Honda OE valve, but the OE valve has a warranty behind it if it fails or somehow contributes damage to the turbo, no? And these 3rd party valves still require maintenance over time, based on what I can glean from the product pages.

Sorry, this is just my ignorance on the whys and what advantage (besides material) it provides.

I mean, unless you can stustustustu the turbo, then I'll pay quadruple ofc.

My understanding is that the factory rubber diaphragm degrades and eventually tears under heat cycles and elevated boost

Failure to recirculate charge air on throttle closure, will cause turbo surge. Repeated surge events carry a high risk of accelerated bearing or turbine wear.

Other symptoms are boost leaks and reduced throttle response

These might not be easily detectable or noticed, and I like to be proactive.

The third party BPVs (Boomba/27WON) are more durable

and at least the Boomba, based on my research, has a higher flow capacity (less risk of not recirculating the extra charged air and causing a turbo surge)

also (for the Boomba) higher boost-holding capacity, with some users reporting a noticeable improvement in throttle response.

I am not sure if the last two are applicable to the 27Won, as I have not done as extensive research as I did for the Boomba... maybe @Vlad can respond to this?

the BPV is on my "watch list", together with 9lb LiFePO4 battery, upper motor mounts, rear sway bar and links, front wishbone bushings, etc.

I am not rushing to purchase, waiting for sales/discounts/coupons/black Friday deals.

 

[zumbooruk]

Similar functionality since that is also a fully recirculating valve. I'm not the biggest fan of the location of the metal vacuum fitting since it positions it straight out and doesn't route nice like OEM on that valve, but that is a small nitpick. I also can't speak to how serviceable that Boomba valve is nor do I see any instructions to do so that is a big question mark.

I have the same concern about the location of the Boomba fitting, yet I found no reports of kinks or issues.

Boomba has video guidance for cleaning and lubrication but no mileage interval like 27WON. I assume same service interval

Based on my research, the Boomba has a higher flow capacity than OEM (i.e. less risk of not recirculating the extra charged air and causing a turbo surge)

and the Boomba reportedly has a higher boost-holding capacity, with some users reporting a noticeable improvement in throttle response.

but now that I learned about the availability of 27WON, I am leaning towards getting the 27WON BPV

Does 27WON also has higher flow capacity compared to OEM BPV?

Does it have a higher boost-holding capacity (and better throttle response)?

I assume so, but want to confirm...

 

[Vlad@27WON]

I'm not quite understanding the why of these types of products. Yes, it sounds more solid than the Honda OE valve, but the OE valve has a warranty behind it if it fails or somehow contributes damage to the turbo, no? And these 3rd party valves still require maintenance over time, based on what I can glean from the product pages.

Sorry, this is just my ignorance on the whys and what advantage (besides material) it provides.

I mean, unless you can stustustustu the turbo, then I'll pay quadruple ofc.

You're unlikely to get warranty coverage with a tuned car. Those pushing more boost are tuned and so you have a recipe for possible tears on the stock setup. If you do get warranty coverage by going back to stock etc etc. , you're just going to get the same OE valve prone to the same issue.

It's easy insurance, especially if you're doing a turbo upgrade. Then, some people just like the look and feel of the beefier valve. No stustustu here, I'm afraid though

 

[Vlad@27WON]

I have the same concern about the location of the Boomba fitting, yet I found no reports of kinks or issues.

Boomba has video guidance for cleaning and lubrication but no mileage interval like 27WON. I assume same service interval

Based on my research, the Boomba has a higher flow capacity than OEM (i.e. less risk of not recirculating the extra charged air and causing a turbo surge)

and the Boomba reportedly has a higher boost-holding capacity, with some users reporting a noticeable improvement in throttle response.

but now that I learned about the availability of 27WON, I am leaning towards getting the 27WON BPV

Does 27WON also has higher flow capacity compared to OEM BPV?

Does it have a higher boost-holding capacity (and better throttle response)?

I assume so, but want to confirm...

Good to know.

By design, it can hold more boost. The Spring/Piston is able to hold up to pressure better and over multiple cycles vs the OE rubber with wearing out as fast. You can rest assured it can take any pressure some of these high HP builds are running. Stock pressures are obviously no problem.

Higher flow, not something I am familiar with honestly. The OE valve has no issue with how much air it can recirculate from what I know.

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