GrimmSpeed 3-Port Electronic Boost Control Solenoid (Subaru)

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.

Features

  • 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
  • 1/4in Barbed Fittings - Matches the factory turbo and wastegate hose size
  • 3-Port Solenoid - Proprietary internal modifications prepare the solenoid for extreme conditions below the vehicle
  • Plug-n-Play Wiring Connector - Plugs directly into the factory wiring harness with no modification required
  • Compact Design - No need to mount the solenoid elsewhere in the engine bay, increasing complexity and hose length
Weight
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SKU
GRM057007 GRM057041 GRM057032 GRM057002 GRM057001
Weight
0.00 lbs
Our Price: As low as $113.00

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 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 pro-tuner. 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

bcs-subaru-fa20-6-original.jpg

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.

A small mounting bracket secures the solenoid to the machined adapter, to create a compact system, while still allowing those interested in running other boost control solutions the flexibility to do so. Mounting the solenoid directly in place of the stock solenoid allows for vacuum hoses of similar length and a shorter wiring harness. Lastly, we identified the exact electrical connector used on the stock solenoid so that the GrimmSpeed solution would be a true plug and play.

 

Why GrimmSpeed?

The GrimmSpeed Boost Control Solenoid has been proven time and time again. With tens of thousands on vehicles across the world, tuners trust it and our customers love it. What you see here is the same great solenoid with millions of miles of real world testing and an innovative mounting solution, designed specifically for your vehicle. The machined adapter also features standard NPT threads, should you choose to upgrade to AN lines and fittings, or even a different boost control solution (manual, standalone, hybrid, etc) down the road. Finally, the GrimmSpeed BCS system will arrive fully assembled and ready for installation.

 

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

  • GrimmSpeed 3-Port Boost Control Solenoid w/ Plug-n-Play Connector

  • Machined and anodized turbo inlet adapter w/ VITON O-Ring

  • Laser Cut and CNC bent steel bracket, black zinc plated w/ stainless press-in nuts

  • Zinc plated barbed fittings, preassembled w/ anaerobic sealant

  • 2ft of 1/4in Vacuum Hose w/ zip ties

  • All necessary hardware

 

Vehicle Fitment

GRM057007

  • 2008+ Subaru STI

GRM057041

  • 2015+ Subaru WRX

GRM057041

  • 2008 - 2014 Subaru WRX
  • 2005 - 2009 Subaru Legacy GT

GRM057002

  • 2004 - 2007 Subaru STI
  • 2006 - 2007 Subaru WRX
  • 2004 - 2008 Subaru Forester XT

GRM057001

  •  2002 - 2005 Subaru WRX

warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.

Weight
0.00 lbs
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