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GrimmSpeed

GrimmSpeed FA20 Boost Control Solenoid Adapter

Regular price $39.00 USD
Regular price Sale price $39.00 USD
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An elegantly engineered solution.

  • Custom Machined Adapter - Makes use of the factory inlet recirculation port, instead of blocking it off
  • Black Anodized Finish - Protects the assembly from corrosion in an extremely demanding environment
  • Viton O-Ring - Increased durability and resistance to oil/gasoline

boost-solenoid-2015wrx-9-635.jpg

If you've been in the Subaru game for long, you're probably well aware that a 3-port Boost Control Solenoid (BCS) is considered my most to be a 'must have' improvement before having your car tuned. GrimmSpeed has become the trusted brand in the BCS market, with tens of thousands of solenoids in operation today across the globe.

The 2015 WRX offers a unique change of pace, as the factory 2-port solenoid is mounted directly to the plastic turbo inlet and interfaces with an o-ringed feature, rather than a vacuum hose. With expertise in designing machined parts and a tried and true boost control solenoid, we were excited to dig in and create a solution with an already proven pedigree of high performance and quality. Other 3-Port boost control solutions don't facilitate the proper use of the turbo inlet's recirculation port. This product will allow existing owners of other boost control solutions to adapt their system and utilize that port properly.

The 3-Port Advantage

boost-solenoid-2015wrx-8-framed-1600.jpg   bcs-subaru-fa20-5-original.jpg

The advantages of a 3-port boost control system vs. the factory 2-port system are readily apparent during the tuning process. The 3-port systems works by interrupting the boost signal traveling from the turbo to the wastegate. That boost is redirected back into the turbo inlet and re-ingested by the turbo using our machined adapter. This is important, as the factory Mass Airflow Sensor has already measured that air and is expecting that your motor will use it during combustion, rather than venting it to the atmosphere. The factory configuration simply 'bleeds' the signal from between the turbo and wastegate, which creates a system that is a bit less complex, but reacts more slowly and with less precision. The chart above shows two boost plots. The 'before' is our 2015 WRX, dyno tuned by a third party protuner. The 'after' is the exact same tune, but after the installation of the GrimmSpeed 3-Port BCS. As you can see, the addition of the GrimmSpeed BCS shows much tighter boost control and consistency. This is safer for your car and easier for your tuner.

Design

We began by recreating the factory turbo inlet and solenoid in CAD to ensure a perfectly fitting system. From there, we designed a beautifully fitting machined adapter that would recreate the o-ring sealing feature that the factory solenoid uses. This bracket features 1/8 NPT threads so that both barbed fittings (included) and AN fittings can be used interchangeably, for use with the GrimmSpeed BCS, Manual Boost Controller, or other boost control solutions.

Tuning Notes:

Because this upgraded solenoid affects the way that your vehicle controls boost (that's the point!), it is always recommended that you consult with a tuner immediately following installation. It is not recommended that you drive the car in a way that builds boost without doing so. If you have any questions, don't hesitate to get in touch with us directly!

Included:

  • Machined and anodized turbo inlet adapter w/ VITON O-Ring
  • Zinc plated barbed 1/4in fitting, preassembled w/ anaerobic sealant
  • 4ft of 1/4in Vacuum Hose w/ zipties
  • Laser cut universal mounting bracket
  • All necessary hardware

Fitments:

  • 2015-21 Subaru WRX
  • All FA20 Equipped Vehicles
  • 2010-2012 Legacy GT Fitment Coming Soon


This Part Fits:

 

Year Make Model Submodel
2015-2020 Subaru WRX Base
2015-2020 Subaru WRX Limited
2015-2020 Subaru WRX Premium

Shipping & Returns

In most cases orders are processed same day or the next business day. Most orders take about 1-3 business days to ship.

Please note that all orders are processed and shipped Monday-Friday 10a-6p PST excluding weekends and holidays.

Any orders placed after 4p PST for items that are in stock will be shipped the next business day

Returns and exchanges are only offered on eligible items, excluding final sale and special ordered items.

All returns/exchange inquiries must be made within 14 days after receipt of order. Any inquiries after the 14 day period will not be honored. Please contact our sales staff for any return/exchange inquiries, and we will be more than happy to assist you!

Any returns received without an RMA (Return Merchandise Authorization) number will be automatically declined, and the customer will be responsible for shipping the order back to them.

Once you receive your RMA number, you will have 30 days to ship the item/order back to the respective location. If the item/order is not shipped within the 30 day period, the return will be declined, and the customer will be responsible for paying for shipping the item/order back to them.

Special Order & Final Sale

All special order items are deemed as "made to order" - and therefore cannot be canceled, returned, exchanged, or refunded for any reason. The same policy applies to final sale items. These are non-negotiable terms, so please keep this in mind before checking out. If you have any questions regarding these terms, please feel free to read our policy for special order and final sale items, or contact one of our sales representatives for clarification!