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Product Details
The Turbosmart GenV RacePort 18 inHg Blow-Off Valve Replacement Spring (TS-0204-3102) is a genuine Turbosmart replacement and tuning spring designed for compatible RacePort 50mm blow-off valves. Featuring an 18 inHg nominal vacuum rating and blue color identification, this spring helps maintain proper blow-off valve operation on turbocharged engines with suitable intake manifold vacuum characteristics.
The internal spring is an essential component of a pneumatic blow-off valve. It provides closing force to help keep the valve sealed during normal engine operation while allowing the valve to respond to pressure changes during throttle transitions.
When the throttle closes, the pressure differential between the intake manifold and charge piping allows the blow-off valve to open, releasing excess compressed air and helping reduce turbocharger compressor surge. Selecting the correct spring is important for consistent valve response, reliable sealing, and effective pressure relief.
The TS-0204-3102 is designed for the outer spring position in compatible Turbosmart RacePort blow-off valves. It is the standard blue spring supplied with several RacePort configurations and can also be combined with approved inner springs to accommodate different engine vacuum conditions.
Manufactured for Turbosmart's high-performance RacePort platform, this replacement spring provides a convenient solution for servicing an existing valve or adjusting its operation without purchasing an entirely new blow-off valve assembly.
Whether maintaining a turbocharged Honda K20/K24, servicing a RacePort on a high-horsepower drag racing application, or correcting an improperly matched blow-off valve spring, the Turbosmart TS-0204-3102 Blue RacePort Spring delivers genuine compatibility and dependable performance.
Features
Genuine Turbosmart Replacement Spring: Designed for compatible Turbosmart RacePort blow-off valves.
18 inHg Nominal Vacuum Rating: Intended for applications with suitable intake manifold vacuum characteristics.
Blue Color Identification: Allows easy identification during installation and maintenance.
RacePort Compatibility: Designed for the Turbosmart RacePort blow-off valve range.
Outer Spring Configuration: Fits the designated outer spring position.
Standard RacePort Spring: Supplied as original equipment in compatible RacePort valve assemblies.
Precision Spring Construction: Designed to provide consistent spring force and valve response.
Durable Construction: Engineered for repeated compression and release cycles.
Supports Proper Valve Sealing: Helps maintain the intended closed-valve operation.
Responsive Pressure Relief: Supports proper valve opening during throttle transitions.
Compressor Surge Protection: Helps the blow-off valve relieve excess charge pressure when correctly configured.
Adjustable Spring Combinations: Can be paired with approved inner springs to accommodate different manifold vacuum ranges.
Direct Replacement Design: Replaces the corresponding original RacePort spring.
Serviceable Component: Allows spring replacement without purchasing a complete blow-off valve.
Street and Motorsport Applications: Suitable for compatible performance turbocharger systems.
Universal Vehicle Application: Compatibility depends on the installed Turbosmart RacePort valve.
Turbosmart Part Number TS-0204-3102: Ensures accurate product identification and ordering.
Popular Performance Applications
The Turbosmart TS-0204-3102 is designed for turbocharged vehicles equipped with compatible Turbosmart RacePort blow-off valves.
Popular performance applications include:
Honda Civic K20 Turbo Builds: K20A, K20A2, K20Z1, and K20Z3 forced-induction systems.
Honda Civic K24 Turbo Builds: K24A and K24A2 turbocharger applications.
Acura RSX Type-S Turbo Builds: RacePort-equipped K20 turbocharger installations.
Acura TSX K24 Turbo Applications: Custom K24 forced-induction systems.
Honda Accord K-Series Turbo Builds: High-performance turbocharger configurations.
Honda S2000 Turbo Builds: F20C and F22C forced-induction applications.
Acura Integra Turbo Builds: B-Series and K-Series turbocharger systems.
Honda Prelude Turbo Builds: H-Series and K-Series forced-induction applications.
K20/K24 Frankenstein Turbo Builds: High-horsepower K-Series performance engines.
B16, B18, and B20 Turbo Builds: Custom RacePort blow-off valve installations.
Subaru WRX and STI Turbo Builds: Compatible aftermarket RacePort applications.
Mitsubishi Evolution Turbo Builds: High-performance forced-induction systems.
Nissan SR20DET and RB-Series Turbo Builds: Custom turbocharger installations.
Toyota 1JZ and 2JZ Turbo Builds: High-horsepower turbocharger systems.
Drag Racing Applications: Blow-off valve maintenance and spring selection.
Roll Racing Applications: Performance turbocharger pressure relief systems.
Track and Motorsport Vehicles: RacePort servicing and tuning.
Important: This is a universal replacement component, not a vehicle-specific direct-fit part. The vehicle must be equipped with a compatible Turbosmart RacePort blow-off valve, and the spring must be appropriate for the engine's measured manifold vacuum.
Additional Information
- Manufacturer: Turbosmart
- Part Number: TS-0204-3102
- Product Name: GenV RacePort Blow-Off Valve Spring – 18 inHg
- Product Type: Blow-Off Valve Replacement / Tuning Spring
- Compatible Valve Series: Turbosmart RacePort
- Nominal Spring Rating: 18 inHg
- Spring Color: Blue
- Spring Position: Outer
- Recommended Manifold Vacuum Range: 14–18 inHg when used individually
- Additional Vacuum Range: 18–22 inHg when combined with the approved 4 inHg pink inner spring
- Primary Function: Blow-Off Valve Spring Force and Response Adjustment
- Installation Location: Internal Spring Chamber of Compatible RacePort Blow-Off Valve
- Vehicle Fitment: Universal, Based on Blow-Off Valve Compatibility
- Quantity: One Replacement Spring
- UPC: 9329677010732
Genuine Turbosmart RacePort Replacement Spring
The TS-0204-3102 is manufactured specifically for the Turbosmart RacePort blow-off valve range.
Its spring characteristics are designed to provide the correct closing force for compatible RacePort valve assemblies.
Using the proper replacement spring helps maintain the intended relationship between the valve's mechanical closing force and the engine's manifold vacuum.
The blue spring is also identified by Turbosmart as the spring originally fitted to RacePort models TS-0204-1101 and TS-0204-1102.
18 inHg Nominal Spring Rating
The TS-0204-3102 features a nominal vacuum rating of 18 inches of mercury.
According to Turbosmart's RacePort spring selection chart, the blue spring is suitable for engines producing approximately 14–18 inHg of manifold vacuum when used by itself.
The correct spring should be selected based on the engine's measured operating vacuum.
An engine's vacuum characteristics can change significantly with camshaft upgrades, idle adjustments, intake modifications, and other performance changes.
Important: The 18 inHg rating refers to manifold vacuum characteristics, not turbocharger boost pressure.
Outer Spring Position
The blue TS-0204-3102 is designed for the outer spring position within compatible RacePort blow-off valves.
Turbosmart's RacePort spring system allows approved inner and outer springs to be combined for different manifold vacuum conditions.
The blue spring should not be substituted into an incorrect spring position.
Always follow Turbosmart's installation instructions when changing spring configurations.
How the RacePort Blow-Off Valve Spring Works
A pneumatic blow-off valve responds to pressure differences between the intake manifold and charge piping.
During acceleration, the valve remains closed to retain compressed intake air.
When the throttle closes, intake manifold pressure drops while pressure remains in the charge piping.
The resulting pressure differential allows the valve to open and discharge excess compressed air.
The internal spring provides mechanical closing force and influences how the valve responds to these pressure changes.
Selecting the correct spring helps ensure reliable pressure relief without unwanted valve opening.
Turbosmart RacePort Spring Options
Turbosmart offers multiple spring options for its RacePort blow-off valve range.
Pink Inner Spring – 4 inHg
Intended for low-vacuum applications.
Used independently or in approved spring combinations.
Available through the appropriate Turbosmart RacePort spring kit or replacement listing.
Orange Inner Spring – Approximately 7–8 inHg
Intended for engines with relatively low manifold vacuum.
Part number: TS-0204-2105.
Used independently or in approved combinations.
Purple Outer Spring – Approximately 9–10 inHg
Intended for moderate-vacuum applications.
Available as part of Turbosmart's RacePort spring kit.
Can be combined with the appropriate inner spring.
Green Outer Spring – 15 inHg
Intended for engines with moderate-to-high manifold vacuum.
Part number: TS-0204-3105.
Can be combined with approved inner springs.
Blue Outer Spring – 18 inHg
Intended for engines with higher manifold vacuum.
Part number: TS-0204-3102.
Standard spring supplied with compatible RacePort valves.
Can be combined with approved inner springs.
Spring ratings and recommended combinations should always be checked against the current Turbosmart installation instructions.
Popular Blue Spring Combinations
Turbosmart's RacePort spring chart identifies the following applications for the blue 18 inHg outer spring.
Blue Spring Only
Blue 18 inHg outer spring.
Recommended manifold vacuum range: 14–18 inHg.
Blue Spring + Pink Inner Spring
Blue 18 inHg outer spring.
Pink 4 inHg inner spring.
Recommended manifold vacuum range: 18–22 inHg.
Blue Spring + Orange Inner Spring
Blue 18 inHg outer spring.
Orange inner spring.
Recommended manifold vacuum range: 22–26 inHg.
These are manufacturer-specified spring combinations, not turbocharger boost pressure settings.
Correct Spring Selection
Choosing the correct RacePort spring is important for consistent blow-off valve operation.
A spring that is too stiff for the engine's vacuum characteristics may prevent the valve from opening correctly during throttle transitions.
A spring that is too soft may contribute to unwanted valve opening or poor sealing under certain operating conditions.
For best results, measure the engine's manifold vacuum under normal operating conditions and select the appropriate spring combination from Turbosmart's chart.
High-Vacuum Engine Applications
The blue 18 inHg RacePort spring is particularly useful for compatible engines that produce relatively high manifold vacuum.
This may include:
Turbocharged engines with mild camshaft profiles.
Engines retaining factory-style idle vacuum characteristics.
Street-driven performance vehicles.
Turbocharged engines requiring a firmer RacePort spring configuration.
Applications using approved combinations for higher manifold vacuum.
Actual spring selection should always be based on measured vacuum rather than engine displacement or horsepower alone.
Spring Rating vs. Boost Pressure
The TS-0204-3102 does not control the turbocharger's maximum boost pressure.
Boost pressure is regulated by the wastegate, boost controller, turbocharger system, and engine management calibration.
The blow-off valve spring controls the valve's mechanical closing characteristics.
Installing an 18 inHg spring does not create an 18 PSI boost setting or increase engine horsepower.
RacePort vs. Big Bubba Spring Compatibility
Turbosmart manufactures separate replacement spring systems for its RacePort and Big Bubba blow-off valve families.
Although both product lines are designed for high-performance turbocharger applications, their springs should not be assumed interchangeable.
The TS-0204-3102 is specifically intended for compatible RacePort blow-off valves.
Big Bubba valves require their corresponding replacement spring part numbers.
Replacement Spring vs. Complete Blow-Off Valve
The TS-0204-3102 is a replacement spring only.
It does not include the RacePort valve body, diaphragm, piston, mounting flange, V-band clamp, or pressure reference fittings.
It is intended for applications where the existing RacePort valve is serviceable and an 18 inHg blue spring is required.
Common Reasons for Replacement
Incorrect Blow-Off Valve Spring: Replaces a spring that does not match the engine's manifold vacuum.
RacePort Spring Tuning: Allows adjustment of valve opening and closing characteristics.
Damaged or Worn Spring: Replaces a compromised original spring.
High Manifold Vacuum Applications: Provides the appropriate spring for compatible engines.
Compressor Surge Troubleshooting: Supports correction of an improperly matched spring when diagnosed as the cause.
Unwanted Valve Opening: Helps correct valve behavior when the existing spring is too soft.
Blow-Off Valve Maintenance: Provides a genuine replacement component during RacePort servicing.
Performance Engine Upgrades: Supports changes in engine vacuum characteristics.
Used RacePort Restoration: Replaces missing or unidentified springs.
Motorsport Maintenance: Provides a replacement spring for compatible high-performance valves.
Preventative Maintenance: Replaces a damaged spring before it affects valve operation.
Installation Notes
Verify Blow-Off Valve Compatibility: Confirm that the installed valve is a compatible Turbosmart RacePort model.
Measure Engine Manifold Vacuum: Determine the engine's normal operating vacuum before selecting a spring.
Confirm Spring Selection: Verify that the blue 18 inHg spring or an approved combination is appropriate.
Review Turbosmart Instructions: Follow the manufacturer's RacePort installation and servicing documentation.
Allow the Engine to Cool: Avoid servicing components near hot turbocharger or exhaust parts.
Inspect the Existing Valve: Check for leaks, damaged fittings, or other service issues.
Remove the Valve if Necessary: Follow the appropriate removal procedure.
Prepare for Spring Compression: The spring may be under compression and must be handled carefully.
Open the RacePort Assembly: Follow Turbosmart's approved cap removal procedure.
Remove the Existing Spring: Carefully extract the original spring or spring combination.
Inspect the Internal Components: Check the diaphragm, piston, spring seat, and sealing surfaces.
Clean the Spring Chamber: Remove dirt and contamination.
Inspect the Replacement Spring: Confirm that the TS-0204-3102 is undamaged.
Install the Blue Outer Spring: Position the replacement spring in the correct outer spring location.
Install Additional Approved Springs if Required: Follow Turbosmart's official spring combination chart.
Verify Spring Alignment: Ensure all springs are properly centered and seated.
Reassemble the Blow-Off Valve: Follow the manufacturer's servicing instructions.
Secure the Valve Assembly: Confirm that all retaining components are correctly installed.
Reconnect Pressure Reference Hoses: Verify that the correct manifold reference connection is secure.
Inspect for Boost Leaks: Check the valve and mounting connections.
Verify Valve Operation: Confirm appropriate opening and closing behavior.
Perform Controlled Initial Testing: Monitor for compressor surge, unwanted valve opening, or pressure leakage.
Reinspect After Installation: Check the valve assembly and pressure reference plumbing.
Important: Incorrect blow-off valve spring selection can result in poor valve response, unwanted leakage, or inadequate pressure relief. Always select the spring according to the engine's measured manifold vacuum and Turbosmart's recommendations.
What's Included
(1) Turbosmart GenV RacePort 18 inHg Blow-Off Valve Replacement Spring – Blue (TS-0204-3102)
Note: This listing includes one blue 18 inHg replacement spring only. The complete RacePort blow-off valve, additional springs, mounting flange, diaphragm, piston, and other accessories are not included.
Maintain reliable blow-off valve operation with the Turbosmart GenV RacePort 18 inHg Replacement Spring – Blue (TS-0204-3102).
Designed for compatible Turbosmart RacePort blow-off valves, this genuine replacement spring features an 18 inHg nominal vacuum rating, blue color identification, and an outer spring configuration suitable for approved RacePort spring combinations.
Whether servicing a turbocharged Honda K20/K24, replacing a worn RacePort spring, or selecting the correct spring for a high-vacuum engine application, the Turbosmart TS-0204-3102 delivers dependable spring performance and genuine Turbosmart compatibility.
| Part Number: | TS-0204-3102 |
| Brand: | Turbosmart |
| Color: | Blue |
| 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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