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Product Details
The Turbosmart RacePort Blow-Off Valve Spring Kit (TS-0204-2104) is a genuine Turbosmart replacement and tuning kit designed to adjust the operating characteristics of compatible RacePort blow-off valves. Featuring three color-coded springs and a locking collar service tool, this kit allows enthusiasts and professional tuners to select the appropriate blow-off valve spring configuration based on engine manifold vacuum.
Proper blow-off valve spring selection is essential for maintaining consistent valve operation, preventing unwanted boost leaks, and ensuring rapid pressure relief during throttle transitions. Because different engines and performance modifications produce varying levels of manifold vacuum, a single spring configuration may not be suitable for every application.
The TS-0204-2104 kit includes a pink inner spring, purple outer spring, and orange inner spring, allowing multiple spring configurations to accommodate a wide range of engine vacuum conditions.
The included springs can be installed individually or combined with other compatible RacePort springs according to Turbosmart's recommended spring selection chart.
The kit also includes a locking collar tool, allowing the RacePort actuator assembly to be safely accessed for spring replacement and servicing.
Whether tuning a turbocharged Honda K20/K24, configuring a B-Series forced-induction system, or adjusting a RacePort blow-off valve on a custom motorsport application, the Turbosmart TS-0204-2104 Spring Kit provides the components needed to optimize blow-off valve operation for different engine vacuum characteristics.
Features
Genuine Turbosmart RacePort Spring Kit: Designed for compatible Turbosmart RacePort blow-off valves.
Part Number TS-0204-2104: Genuine replacement and tuning accessory.
Three Color-Coded Springs Included: Provides multiple vacuum adjustment options.
Pink Inner Spring: Nominal 4 inHg spring rating.
Purple Outer Spring: Nominal 10 inHg spring rating.
Orange Inner Spring: Nominal 8 inHg spring rating.
Locking Collar Tool Included: Allows convenient access to the RacePort spring assembly.
Adjustable Valve Response: Supports tuning for different engine manifold vacuum characteristics.
Multiple Spring Combinations: Allows additional configurations when combined with compatible RacePort springs.
Wide Vacuum Compatibility: Supports manufacturer-approved configurations for engines operating across approximately 0–22 inHg of manifold vacuum.
Helps Prevent Unwanted Valve Opening: Proper spring selection helps maintain valve sealing under appropriate operating conditions.
Supports Responsive Pressure Relief: Allows the valve to open correctly during throttle transitions.
Compatible with RacePort BOV Range: Designed for the applicable Turbosmart RacePort spring system.
Service and Maintenance Application: Suitable for spring changes and blow-off valve servicing.
Universal Performance Use: Applicable to compatible RacePort-equipped turbocharger systems regardless of vehicle make or model.
Popular Performance Applications
The Turbosmart TS-0204-2104 is designed for compatible Turbosmart RacePort blow-off valves, rather than a specific vehicle or engine.
Popular applications include:
Honda Civic K20 Turbo Builds: RacePort-equipped K20A, K20A2, K20Z1, and K20Z3 turbocharger systems.
Honda Civic K24 Turbo Builds: Compatible RacePort installations on K24-powered vehicles.
Acura RSX Type-S Turbo Builds: Adjusting RacePort spring configurations on custom K20 turbocharger systems.
Acura TSX K24 Turbo Applications: Suitable for compatible RacePort blow-off valve installations.
Honda Accord K-Series Turbo Builds: Supports spring adjustment on RacePort-equipped turbo systems.
Honda S2000 Turbo Builds: Suitable for RacePort-equipped F20C and F22C forced-induction systems.
Acura Integra Turbo Builds: Compatible RacePort installations on B-Series and K-Series engines.
Honda Prelude Turbo Builds: Supports RacePort spring adjustments on compatible H-Series and K-Series turbo systems.
K20/K24 Frankenstein Turbo Builds: Suitable for custom turbocharger systems using a compatible RacePort valve.
B16, B18, and B20 Turbo Builds: Supports proper spring selection for compatible RacePort applications.
Subaru WRX and STI Turbo Builds: Suitable for RacePort-equipped aftermarket turbocharger systems.
Mitsubishi Evolution Turbo Builds: Supports RacePort blow-off valve tuning.
Nissan SR20DET and RB-Series Turbo Builds: Suitable for compatible RacePort installations.
Toyota 1JZ and 2JZ Turbo Builds: Supports spring adjustment on RacePort-equipped turbocharger systems.
Drag Racing and Roll Racing Applications: Useful for configuring RacePort valve response on competition turbo systems.
Important: Fitment is determined by the Turbosmart blow-off valve model, not the vehicle. Verify compatibility with your specific RacePort valve before ordering.
Additional Information
- Manufacturer: Turbosmart
- Part Number: TS-0204-2104
- Product Name: RacePort Blow-Off Valve Spring Kit
- Product Type: Blow-Off Valve Replacement and Tuning Springs
- Compatible Product: Turbosmart RacePort BOV Range
- Pink Spring: Inner Spring – Nominal 4 inHg
- Purple Spring: Outer Spring – Nominal 10 inHg
- Orange Spring: Inner Spring – Nominal 8 inHg
- Operating Vacuum Range: Approximately 0–22 inHg with appropriate approved spring configurations
- Spring Quantity: 3
- Service Tool Included: Locking Collar Tool
- Vehicle Fitment: Universal, Based on RacePort BOV Compatibility
- UPC: 9329677010725
Understanding Blow-Off Valve Spring Pressure
A blow-off valve uses a spring and pressure-responsive mechanism to control when the valve opens and closes.
During acceleration, the valve must remain sealed to prevent compressed air from escaping the turbocharger system.
When the throttle closes, the pressure difference between the charge piping and intake manifold causes the valve to open and release excess compressed air.
The internal spring influences how the valve responds to these pressure changes.
Selecting the correct spring helps ensure the valve remains closed when required while opening appropriately during throttle transitions.
Pink Inner Spring – 4 inHg
The included pink inner spring has a nominal 4 inHg rating.
This spring is designed for applications requiring a relatively light spring configuration.
It can be used individually or combined with compatible outer springs according to Turbosmart's spring selection chart.
Purple Outer Spring – 10 inHg
The included purple outer spring has a nominal 10 inHg rating.
This spring provides an alternative configuration for engines with different manifold vacuum characteristics.
The purple spring can also be combined with the pink inner spring when specified by Turbosmart.
Orange Inner Spring – 8 inHg
The included orange inner spring has a nominal 8 inHg rating.
This spring provides another adjustment option for compatible RacePort blow-off valves.
Its inner-spring configuration allows it to be used with approved outer spring combinations.
Multiple Spring Configurations
The TS-0204-2104 kit supports multiple RacePort spring configurations.
Spring selection should be based on the engine's actual manifold vacuum and Turbosmart's recommended spring chart.
Depending on the engine's vacuum characteristics, the appropriate configuration may involve a single spring or a combination of compatible inner and outer springs.
The kit does not contain every available RacePort spring. Certain configurations require additional springs sold separately.
Engine Vacuum vs. Turbocharger Boost Pressure
Blow-off valve spring ratings are measured in inches of mercury (inHg), which is a unit commonly used to describe intake manifold vacuum.
This differs from external wastegate springs, which are commonly rated in PSI of boost pressure.
A RacePort spring rated at 10 inHg does not mean the blow-off valve is limited to 10 PSI of turbocharger boost.
The spring selection determines how the valve responds to manifold vacuum and pressure differences.
Measuring Engine Manifold Vacuum
Before selecting a spring, measure the engine's manifold vacuum at a stable idle under the conditions specified by Turbosmart.
A suitable vacuum gauge or engine management system can be used to determine the reading.
Modified engines may produce different vacuum levels than factory configurations.
Factors affecting manifold vacuum include:
Camshaft profile and overlap.
Engine displacement.
Idle speed.
Throttle configuration.
Intake manifold design.
Engine tuning.
Engine operating condition.
Accurate measurement is important for choosing the appropriate spring configuration.
Locking Collar Tool Included
The TS-0204-2104 includes a locking collar service tool.
This tool is used to access the RacePort spring assembly during servicing.
Using the correct tool helps simplify spring replacement and reduces the risk of damaging the valve's locking collar.
Always follow Turbosmart's instructions when disassembling a spring-loaded blow-off valve.
Proper Spring Selection
An incorrectly selected blow-off valve spring can affect valve operation.
A spring that is too light may allow the valve to open when it should remain closed.
A spring that is too stiff may prevent the valve from opening correctly during throttle transitions.
Either condition can negatively affect turbocharger system performance.
The correct spring should be selected using the manufacturer's recommended spring chart rather than choosing solely based on engine horsepower or maximum boost pressure.
Common Reasons for Replacement
Incorrect Blow-Off Valve Spring Pressure: Adjusts the valve to match engine manifold vacuum.
Engine Camshaft Upgrades: Supports revised spring requirements after changes affecting idle vacuum.
Engine Management Changes: Allows spring selection following tuning or operating changes.
Turbocharger System Upgrades: Provides additional spring configuration options.
Poor Blow-Off Valve Response: Helps correct operation when the existing spring is unsuitable.
Unwanted Valve Opening: Allows selection of an appropriate spring configuration.
Compressor Surge Concerns: Supports correct valve operation when spring selection is a contributing factor.
Damaged or Worn Springs: Provides genuine replacement springs.
RacePort Blow-Off Valve Servicing: Includes a locking collar tool for maintenance.
Custom Turbocharger Builds: Supports proper RacePort setup for different engine combinations.
Motorsport Applications: Allows spring configurations to be tailored to specific operating conditions.
Installation Notes
Verify Blow-Off Valve Compatibility: Confirm that the kit is suitable for your specific Turbosmart RacePort model.
Measure Engine Vacuum: Determine manifold vacuum at a stable idle using an appropriate gauge or engine management system.
Review the Spring Selection Chart: Select the recommended spring configuration for the measured vacuum.
Allow the Engine to Cool: Do not service the blow-off valve while surrounding components are hot.
Remove the Blow-Off Valve if Necessary: Follow Turbosmart's recommended service procedure.
Clean the Valve Exterior: Prevent dirt and debris from entering the assembly.
Secure the Valve: Position it safely for servicing.
Use the Included Locking Collar Tool: Follow the manufacturer's instructions for accessing the spring assembly.
Control Spring Tension: Carefully release the spring-loaded assembly.
Remove the Existing Spring: Inspect the spring and internal components for wear or damage.
Inspect the Diaphragm: Check for deterioration, tearing, or other damage.
Select the Correct Replacement Spring: Use the appropriate color-coded spring or approved combination.
Install the Spring: Ensure correct positioning within the valve assembly.
Reassemble the Valve: Follow Turbosmart's specified procedure.
Secure the Locking Collar: Verify that the assembly is correctly seated.
Reinstall the Blow-Off Valve: Confirm proper mounting and sealing.
Reconnect the Vacuum Reference Hose: Check for kinks, leaks, or damaged fittings.
Start the Engine: Verify normal idle operation.
Inspect for Vacuum Leaks: Confirm that the valve and reference plumbing are sealed.
Verify Blow-Off Valve Operation: Check for correct response during throttle transitions.
Perform Controlled Testing: Monitor valve operation under appropriate driving or dyno conditions.
Reinspect After Initial Operation: Check the assembly for leaks or loose components.
Important: Incorrect spring installation or selection can cause improper blow-off valve operation, boost leakage, and compressor surge. Always follow Turbosmart's spring selection and servicing instructions.
What's Included
(1) Pink Inner Spring – Nominal 4 inHg
(1) Purple Outer Spring – Nominal 10 inHg
(1) Orange Inner Spring – Nominal 8 inHg
(1) Locking Collar Service Tool
Note: This is a spring and service tool kit only. A complete RacePort blow-off valve, additional springs, diaphragm, V-band clamp, and mounting flange are not included.
Optimize your blow-off valve's response and operating characteristics with the Turbosmart RacePort Blow-Off Valve Spring Kit (TS-0204-2104).
Featuring three color-coded springs and an included locking collar service tool, this genuine Turbosmart kit provides the flexibility needed to configure compatible RacePort blow-off valves for different engine manifold vacuum conditions.
Whether tuning a turbocharged Honda K20/K24, upgrading a B-Series forced-induction system, or maintaining a custom motorsport turbocharger setup, the Turbosmart TS-0204-2104 RacePort Spring Kit delivers the genuine replacement components needed for reliable and consistent blow-off valve performance.
| Part Number: | TS-0204-2104 |
| Brand: | Turbosmart |
| 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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