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Product Details
The Turbosmart GenV RacePort 50mm Blow-Off Valve (TS-0204-1142) is a high-performance atmospheric blow-off valve engineered to provide exceptional airflow capacity, rapid boost pressure relief, and reliable operation in demanding forced-induction applications. Featuring a 50mm inlet, black anodized billet aluminum construction, and female flange mounting configuration, this RacePort is designed for enthusiasts looking to upgrade an existing blow-off valve without replacing compatible charge pipe mounting hardware.
Unlike the standard GenV RacePort models supplied with a weld-on mounting flange, the TS-0204-1142 features a female flange configuration designed to accommodate compatible competitor-style mounting systems. This makes it an excellent option for turbocharged vehicles already equipped with a suitable blow-off valve flange.
The GenV RacePort is one of Turbosmart's highest-flowing atmospheric blow-off valve designs, capable of discharging over 330 CFM of compressed air. Its large inlet and optimized internal flow path allow excess charge pressure to escape rapidly when the throttle closes, helping reduce the conditions that contribute to compressor surge.
Manufactured from 6000-series billet aluminum, the RacePort offers exceptional strength while maintaining a compact, lightweight design. Turbosmart's advanced construction makes the valve approximately 50% lighter and 25% smaller than comparable competing designs, providing excellent installation flexibility in crowded engine bays.
The TS-0204-1142 features Turbosmart's Boost Balance Technology, a positive-sealing valve seat, MIL-SPEC hard-anodized valve guide and stem, and a high-temperature silicone-Nomex diaphragm. These components work together to provide responsive valve operation, reliable sealing under boost, and long-term durability.
Its quick-release aluminum V-band collar simplifies removal and servicing, while the dual 1/8-inch NPT reference ports provide flexibility when routing vacuum lines.
The RacePort comes equipped with a blue spring rated for approximately -18 to -14 inHg of engine vacuum, making it suitable for many conventional turbocharged engine applications.
Whether upgrading a turbocharged Honda K20/K24, replacing an existing blow-off valve on a B-Series build, or assembling a high-horsepower motorsport turbocharger system, the Turbosmart GenV RacePort TS-0204-1142 provides exceptional airflow capacity, proven performance, and convenient mounting compatibility.
Features
Genuine Turbosmart GenV RacePort: High-performance atmospheric blow-off valve engineered for demanding forced-induction applications.
50mm / 2.0-Inch Inlet: Large inlet provides substantial charge pressure relief capacity.
330+ CFM Flow Capacity: Designed to discharge more than 330 cubic feet of air per minute.
Female Flange Mounting Configuration: Designed to fit compatible competitor-style blow-off valve mounting systems.
Black Anodized Finish: Provides a clean, professional appearance.
6000-Series Billet Aluminum Construction: Combines strength, precision machining, and lightweight design.
Compact Lightweight Construction: Approximately 50% lighter and 25% smaller than comparable competing designs.
Atmospheric Venting: Releases excess charge pressure directly into the atmosphere.
Boost Balance Technology: Designed to provide reliable valve operation under demanding boost conditions.
Positive-Sealing Valve Seat: Helps prevent unwanted boost leakage.
MIL-SPEC Hard-Anodized Valve Guide: Provides excellent wear resistance.
MIL-SPEC Hard-Anodized Valve Stem: Supports smooth, consistent valve movement.
High-Temperature Silicone-Nomex Diaphragm: Designed for durability in demanding turbocharger environments.
Quick-Release Aluminum V-Band Collar: Allows convenient installation, removal, and servicing.
Dual 1/8-Inch NPT Reference Ports: Provides flexibility for vacuum reference hose routing.
Blue Spring Preinstalled: Rated for approximately -18 to -14 inHg engine vacuum.
Serviceable Spring Configuration: Allows alternative compatible springs to be installed.
Optional Valve Position Sensor Upgrade: Supports advanced monitoring with compatible accessories.
High-Flow Internal Design: Helps relieve charge pressure during rapid throttle transitions.
Universal Performance Application: Suitable for compatible aftermarket turbocharger systems.
No Weld-On Flange Included: Intended for installations already equipped with a compatible mounting flange.
Turbosmart Part Number TS-0204-1142: Ensures accurate identification and ordering.
Popular Performance Applications
The Turbosmart TS-0204-1142 is a universal atmospheric blow-off valve intended for turbocharger systems equipped with a compatible female-flange mounting arrangement.
Popular performance applications include:
Honda Civic K20 Turbo Builds: Custom turbocharger systems using K20A, K20A2, K20Z1, and K20Z3 engines.
Honda Civic K24 Turbo Builds: High-performance K24A, K24A2, and compatible K24 turbocharger installations.
Acura RSX Type-S Turbo Builds: Suitable for compatible K20 turbocharger systems.
Acura TSX K24 Turbo Applications: Supports custom forced-induction configurations.
Honda Accord K-Series Turbo Builds: Suitable for aftermarket turbocharger installations.
Honda S2000 Turbo Builds: Compatible with properly configured F20C and F22C turbocharger systems.
Acura Integra Turbo Builds: Suitable for B-Series and K-Series turbocharger applications.
Honda Prelude Turbo Builds: Supports compatible H-Series and K-Series forced-induction systems.
K20/K24 Frankenstein Turbo Builds: Suitable for high-output custom turbocharger configurations.
B16, B18, and B20 Turbo Builds: Compatible with properly designed charge piping and mounting hardware.
Subaru WRX and STI Turbo Builds: Suitable for compatible aftermarket blow-off valve mounting systems.
Mitsubishi Evolution Turbo Builds: Supports custom turbocharger applications.
Nissan SR20DET and RB-Series Turbo Builds: Suitable for compatible forced-induction systems.
Toyota 1JZ and 2JZ Turbo Builds: Supports high-output turbocharger configurations.
Turbocharged V8 Applications: Suitable for custom high-performance charge-air systems.
Drag Racing Applications: Provides substantial pressure relief capacity for competition turbocharger systems.
Roll Racing Builds: Supports high-horsepower turbocharged vehicles.
Custom Motorsport Applications: Suitable for compatible atmospheric blow-off valve installations.
Important: This is a universal performance component, not a vehicle-specific direct-fit replacement. Compatibility depends on the existing blow-off valve flange dimensions, mounting arrangement, available clearance, and engine management system.
Additional Information
- Manufacturer: Turbosmart
- Part Number: TS-0204-1142
- Product Series: GenV RacePort
- Product Type: Atmospheric Blow-Off Valve
- Valve Inlet Diameter: 50mm / 2.0 Inches
- Flow Capacity: Over 330 CFM
- Venting Configuration: Vent to Atmosphere
- Mounting Configuration: Female Flange / Compatible Competitor-Style Mounting Systems
- Body Material: 6000-Series Billet Aluminum
- Finish: Black Anodized
- Valve Guide and Stem: MIL-SPEC Hard Anodized
- Diaphragm Material: High-Temperature Silicone-Nomex
- Pressure Reference Ports: (2) 1/8-Inch NPT
- Preinstalled Spring: Blue
- Installed Spring Vacuum Rating: -18 to -14 inHg
- Optional Position Monitoring: Hall Effect Valve Position Sensor Compatible
- Weld-On Mounting Flange: Not Included
- Vehicle Fitment: Universal, Based on Mounting Compatibility
- UPC: 9329677021486
Female Flange Mounting Configuration
One of the most important features of the TS-0204-1142 is its female flange mounting arrangement.
This version of the GenV RacePort is specifically designed for installations utilizing compatible competitor-style blow-off valve flanges.
Rather than requiring customers to remove and replace an existing mounting flange, the female flange configuration may allow the RacePort to be installed using the existing compatible hardware.
This can simplify upgrades from other aftermarket blow-off valves.
Important: Not all 50mm blow-off valve flanges are interchangeable. Verify the exact flange profile, dimensions, and sealing arrangement before ordering.
No Weld-On Flange Included
Unlike standard GenV RacePort configurations supplied with a weld-on mounting fitting, the TS-0204-1142 does not include a weld-on flange.
This version is intended for applications where a compatible mounting flange is already installed.
Customers building a new turbocharger system from scratch may prefer a standard RacePort kit that includes the appropriate weld-on fitting.
50mm High-Flow RacePort Design
The GenV RacePort features a large 50mm inlet designed to provide exceptional airflow capacity.
With a flow rating exceeding 330 CFM, the RacePort can rapidly discharge compressed air when the throttle closes.
This substantial airflow capacity makes it well suited for high-output turbocharger applications.
The 330+ CFM specification refers to the valve's discharge airflow capacity and should not be interpreted as a guaranteed engine horsepower rating.
Understanding Blow-Off Valve Operation
A blow-off valve releases excess pressure from the turbocharger's charge piping when the throttle closes.
During acceleration, the turbocharger compresses incoming air and delivers it toward the engine.
When the throttle closes, airflow through the throttle body decreases rapidly.
The turbocharger compressor may continue producing pressure, causing compressed air to accumulate between the compressor and throttle body.
The RacePort responds to the pressure differential between the charge piping and intake manifold reference signal, opening to release excess pressure.
This helps reduce the conditions that contribute to compressor surge.
Boost Balance Technology
The GenV RacePort incorporates Turbosmart's Boost Balance Technology.
This design helps the valve maintain reliable sealing under boost while allowing responsive operation during throttle transitions.
Consistent sealing is important because unwanted air leakage can reduce boost pressure and affect engine performance.
The RacePort's internal design is engineered to provide dependable operation across demanding turbocharger conditions.
6000-Series Billet Aluminum Construction
The RacePort is manufactured from 6000-series billet aluminum.
Billet aluminum construction provides excellent strength while minimizing weight.
The material also allows precise machining of the valve's internal components and sealing surfaces.
Its lightweight construction is particularly beneficial in custom turbocharger installations where available space and component weight are important considerations.
Compact and Lightweight Design
Turbosmart designed the RacePort to be approximately 50% lighter and 25% smaller than comparable competing blow-off valves.
This compact construction helps simplify installation in crowded engine bays.
The smaller overall profile is especially useful when the blow-off valve is positioned near intercooler piping, intake components, or surrounding engine hardware.
MIL-SPEC Hard-Anodized Valve Components
The GenV RacePort features a MIL-SPEC hard-anodized valve guide and stem.
Hard anodizing creates a durable protective surface that improves wear resistance.
These components help maintain smooth, consistent valve movement during repeated opening and closing cycles.
Reliable valve movement is essential for predictable pressure relief and proper sealing.
High-Temperature Silicone-Nomex Diaphragm
The RacePort uses a high-temperature silicone-Nomex diaphragm.
The diaphragm responds to pressure differences between the charge piping and intake manifold reference signal.
This movement allows the valve to open and close as engine operating conditions change.
The diaphragm is designed for durability in demanding turbocharger environments.
Positive-Sealing Valve Seat
The RacePort incorporates a positive-sealing valve seat designed to help prevent boost leakage while the valve is closed.
During acceleration, the blow-off valve must remain sealed so compressed air can reach the engine.
Unwanted leakage can reduce boost pressure and affect turbocharger performance.
The positive-sealing design supports dependable operation when the valve is correctly installed and configured.
Blue Spring Preinstalled
The TS-0204-1142 is supplied with a blue spring rated for approximately -18 to -14 inHg of engine vacuum.
This spring is intended for engines operating within the corresponding vacuum range.
The spring controls how the valve responds to the pressure differential between the charge piping and intake manifold.
Correct spring selection is important for proper valve operation.
Important: Blow-off valve spring ratings are based on engine vacuum characteristics and should not be confused with wastegate boost pressure ratings.
Alternative Spring Configurations
The GenV RacePort supports alternative compatible spring configurations.
These options allow the valve to be tailored to different engine vacuum characteristics.
An incorrect spring may cause the valve to remain open when it should be closed or fail to open properly during throttle transitions.
Always follow Turbosmart's recommended spring selection guidelines.
Alternative springs are sold separately.
Quick-Release Aluminum V-Band Collar
The GenV RacePort features a quick-release aluminum V-band collar.
This design allows the valve to be removed conveniently for servicing.
The V-band assembly provides a secure connection between the valve and its compatible mounting flange.
The collar also supports convenient access to internal components during maintenance.
Dual 1/8-Inch NPT Reference Ports
The RacePort features two 1/8-inch NPT reference ports.
These ports provide flexibility when connecting the valve to an appropriate intake manifold pressure source.
The installer can select the port that provides the most convenient hose routing.
Unused ports must be sealed correctly to prevent vacuum or boost leaks.
The reference hose should connect to a suitable manifold pressure source downstream of the throttle body.
Atmospheric Venting Configuration
The TS-0204-1142 is an atmospheric blow-off valve.
When the valve opens, excess compressed air is released directly into the surrounding atmosphere.
This produces the distinctive discharge sound associated with high-performance turbocharged vehicles.
Atmospheric venting is commonly used in custom turbocharger systems and competition applications.
Important: Vehicles using mass airflow sensor-based engine management may experience drivability issues when metered air is vented into the atmosphere. Engine management compatibility should be verified before installation.
Optional Hall Effect Position Sensor
Turbosmart offers an optional Hall Effect valve position sensor upgrade for compatible GenV RacePort blow-off valves.
The sensor allows the valve's operating position to be monitored by suitable electronic equipment.
This can be useful for advanced engine management systems, data acquisition, and diagnostics.
The position sensor upgrade is sold separately.
Female Flange vs. Standard RacePort
Turbosmart offers multiple GenV RacePort mounting configurations.
TS-0204-1142 – Female Flange, Black: Designed for compatible competitor-style mounting systems. Does not include a weld-on flange.
Standard GenV RacePort Models: Supplied with a dedicated mounting arrangement that includes a weld-on fitting for custom charge pipe fabrication.
The TS-0204-1142 is particularly useful when upgrading an existing blow-off valve installation with compatible mounting hardware.
Blow-Off Valve Placement
The RacePort should be installed in a location that allows efficient pressure relief from the charge piping.
Many custom turbocharger systems position the blow-off valve between the intercooler and throttle body.
The exact location depends on the turbocharger system design and available installation space.
Proper placement should also provide sufficient clearance for the valve outlet, vacuum reference hose, and surrounding components.
Engine Management Considerations
Atmospheric blow-off valves can affect engine operation depending on the fuel injection and airflow measurement strategy.
Speed-density systems using manifold pressure information are often more accommodating of atmospheric venting.
Mass airflow sensor-based systems may require additional calibration or a recirculating valve arrangement.
Professional tuning is recommended when modifying a turbocharged engine's charge-air system.
Common Reasons for Replacement
Upgrading From a Competitor Blow-Off Valve: Female flange design supports compatible existing mounting systems.
High-Horsepower Turbocharger Builds: Provides substantial discharge airflow capacity.
Compressor Surge Concerns: Helps reduce pressure buildup associated with sudden throttle closure.
Damaged Existing Blow-Off Valve: Replaces a worn, leaking, or malfunctioning valve.
Boost Leakage: Provides a replacement when an existing blow-off valve no longer seals correctly.
Turbocharger Upgrades: Supports revised charge pressure relief requirements.
Custom Intercooler Piping Installations: Suitable for compatible existing female-flange mounting arrangements.
Engine Bay Appearance Upgrades: Provides a clean black anodized finish.
Motorsport Applications: Supports demanding forced-induction systems.
Spring Configuration Changes: Supports alternative springs for different engine vacuum characteristics.
Turbo System Rebuilds: Provides a complete replacement blow-off valve assembly.
Preventative Replacement: Replaces aging or damaged pressure relief components.
Installation Notes
Verify Mounting Compatibility: Confirm that the existing blow-off valve flange matches the TS-0204-1142 female flange configuration.
Confirm Engine Management Compatibility: Determine whether atmospheric venting is suitable for the vehicle's airflow measurement strategy.
Review Turbosmart Instructions: Read the current GenV RacePort installation documentation.
Allow the Engine to Cool: Never work on turbocharger or intercooler piping while hot.
Remove the Existing Blow-Off Valve: Follow the manufacturer's recommended removal procedure.
Inspect the Existing Flange: Check for damage, distortion, or excessive wear.
Clean the Mounting Surface: Remove debris and contaminants.
Verify Flange Dimensions: Confirm the mounting profile and sealing arrangement.
Inspect the RacePort: Ensure the valve and mounting components are undamaged.
Position the Blow-Off Valve: Align the RacePort with the compatible mounting flange.
Secure the V-Band Assembly: Install the supplied collar according to Turbosmart's instructions.
Verify Valve Orientation: Ensure sufficient clearance around the valve body and atmospheric discharge.
Select the Vacuum Reference Port: Use the port that provides the best hose routing.
Install the Vacuum Fitting: Use the supplied 1/8-inch NPT fitting.
Seal the Unused Reference Port: Prevent unwanted vacuum or boost leakage.
Connect the Reference Hose: Route the hose to a suitable intake manifold pressure source downstream of the throttle body.
Avoid Hose Restrictions: Prevent kinks, sharp bends, and excessive hose length.
Protect the Vacuum Hose: Keep the hose away from excessive exhaust heat.
Verify the Installed Spring: Confirm that the blue spring is appropriate for the engine's vacuum characteristics.
Select Alternative Springs if Required: Follow Turbosmart's spring selection recommendations.
Inspect All Connections: Check the V-band collar, reference fittings, and vacuum hose.
Perform a Boost Leak Test: Verify that the valve remains sealed under appropriate pressure conditions.
Start the Engine: Check for abnormal vacuum leaks or idle problems.
Verify Valve Operation: Confirm proper opening and closing during throttle transitions.
Monitor Engine Response: Check for hesitation, stalling, or drivability problems.
Review ECU Calibration: Make adjustments if required for the engine management system.
Perform Controlled Road or Dyno Testing: Verify correct operation under boost.
Reinspect After Initial Operation: Check the mounting assembly and vacuum connections.
Important: Incorrect blow-off valve installation, mounting incompatibility, or spring selection can cause boost leakage, compressor surge, and drivability problems. Professional installation and tuning are recommended for high-performance turbocharger systems.
What's Included
(1) Turbosmart GenV RacePort 50mm Blow-Off Valve – Female Flange, Black (TS-0204-1142)
(1) Preinstalled Blue Spring Rated -18 to -14 inHg
1/8-Inch NPT Vacuum Reference Fittings
(1) V-Band Mounting Assembly
(1) Turbosmart Decal
Important: This female-flange version does not include a weld-on mounting flange. Confirm compatibility with your existing blow-off valve flange before ordering. Alternative springs, optional position sensor components, vacuum hose, and custom charge piping are sold separately.
Upgrade your turbocharger pressure relief system with the Turbosmart GenV RacePort 50mm Blow-Off Valve – Female Flange, Black (TS-0204-1142), engineered to deliver exceptional airflow capacity, dependable sealing, and rapid valve response in demanding forced-induction applications.
Featuring a 50mm inlet capable of flowing over 330 CFM, black anodized 6000-series billet aluminum construction, Boost Balance Technology, MIL-SPEC hard-anodized valve components, high-temperature silicone-Nomex diaphragm, and female flange mounting compatibility, the RacePort combines premium performance with convenient installation flexibility.
Whether upgrading a turbocharged Honda K20/K24, replacing an existing blow-off valve on a B-Series build, or assembling a high-horsepower motorsport turbocharger system, the Turbosmart TS-0204-1142 GenV RacePort provides proven engineering, exceptional airflow performance, and reliable boost pressure relief.
| Part Number: | TS-0204-1142 |
| Brand: | Turbosmart |
| Color: | Black |
| Size: | 50mm |
| CARB Approved: | No |
Not legal for sale or use in California on any pollution controlled motor vehicles. See http://www.semasan.com/emissions for state by state emissions requirements.
There is a 5% cancellation fee if you order this product and want to ship it to the state of California.
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
This part does not have vehicle specific fitment. Please contact us if you need assistance.
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