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Product Details
The Turbosmart GenV RacePort 15 inHg Green Replacement Spring (TS-0204-3105) is a genuine Turbosmart tuning and replacement component designed for compatible RacePort blow-off valves. Featuring a 15 inHg vacuum rating and distinctive green color coding, this spring allows enthusiasts to adjust their blow-off valve's operating characteristics to better match their engine's manifold vacuum.
Proper blow-off valve spring selection is essential for reliable operation in turbocharged performance applications. The spring works with the valve's diaphragm assembly to maintain a secure seal during normal engine operation while allowing the valve to respond to changes in manifold pressure.
Different engine configurations produce varying levels of manifold vacuum. Modified camshafts, engine displacement, idle speed, and other performance modifications can influence vacuum readings, making spring selection particularly important for maintaining consistent blow-off valve performance.
The TS-0204-3105 is designed for engines producing approximately 11–15 inHg of manifold vacuum at idle when used as the sole outer spring in a compatible RacePort blow-off valve. This makes it a useful tuning option for certain modified engines that operate with lower idle vacuum than conventional factory configurations.
Manufactured to Turbosmart's performance standards, this replacement spring provides the correct dimensions and operating characteristics for compatible RacePort valve assemblies.
Whether replacing a worn spring, correcting an improperly matched blow-off valve spring, or fine-tuning a turbocharged Honda K20/K24 build, the Turbosmart TS-0204-3105 Green RacePort Spring provides genuine replacement compatibility and reliable valve operation.
Features
Genuine Turbosmart Replacement Spring: Designed for compatible Turbosmart RacePort blow-off valves.
15 inHg Spring Rating: Provides a nominal vacuum rating of 15 inches of mercury.
Green Color Coding: Allows easy identification during installation and servicing.
GenV RacePort Compatibility: Suitable for the Turbosmart GenV RacePort BOV range.
Outer Spring Configuration: Designed for installation in the RacePort's outer spring position.
Vacuum-Based Spring Selection: Helps match valve operation to engine manifold vacuum.
Recommended 11–15 inHg Idle Vacuum Range: Suitable for compatible engines operating within this vacuum range.
Adjustable Spring Combinations: Can be combined with compatible inner springs when specified by Turbosmart.
Reliable Valve Seating: Helps maintain the intended blow-off valve sealing force.
Consistent Valve Response: Supports proper operation during throttle and manifold pressure changes.
Performance Engine Compatibility: Useful for modified turbocharged engines with varying idle vacuum characteristics.
Direct Replacement Component: Replaces the corresponding green RacePort spring.
High-Quality Spring Construction: Designed for repeated compression and demanding operating conditions.
Universal Performance Application: Compatible with specified RacePort valves regardless of vehicle.
Turbosmart Part Number TS-0204-3105: Ensures accurate identification and ordering.
Popular Performance Applications
The Turbosmart TS-0204-3105 is intended for vehicles equipped with compatible Turbosmart RacePort blow-off valves.
Popular applications include:
Honda Civic K20 Turbo Builds: RacePort-equipped K20A, K20A2, K20Z1, and K20Z3 turbocharger systems.
Honda Civic K24 Turbo Builds: Modified K24A and K24A2 forced-induction applications.
Acura RSX Type-S Turbo Builds: Custom K20 turbocharger installations.
Acura TSX K24 Turbo Applications: RacePort-equipped K24 performance engines.
Honda Accord K-Series Turbo Builds: Aftermarket turbocharger systems.
Honda S2000 Turbo Builds: Compatible F20C and F22C forced-induction applications.
Acura Integra Turbo Builds: B-Series and K-Series turbocharger systems.
Honda Prelude Turbo Builds: Custom H-Series and K-Series forced-induction configurations.
K20/K24 Frankenstein Turbo Builds: Performance engines equipped with RacePort blow-off valves.
B16, B18, and B20 Turbo Builds: Modified B-Series applications.
Subaru WRX and STI Turbo Builds: Compatible RacePort installations.
Mitsubishi Evolution Turbo Builds: Aftermarket blow-off valve systems.
Nissan SR20DET and RB-Series Turbo Builds: Custom turbocharger installations.
Toyota 1JZ and 2JZ Turbo Builds: High-performance forced-induction systems.
Drag Racing Applications: RacePort spring replacement and tuning.
Roll Racing Applications: Blow-off valve maintenance and calibration.
Dedicated Motorsport Vehicles: Compatible turbocharged engines requiring a 15 inHg RacePort spring.
Important: This is a universal replacement spring, not a vehicle-specific component. Compatibility is determined by the installed Turbosmart RacePort blow-off valve and the engine's manifold vacuum characteristics.
Additional Information
- Manufacturer: Turbosmart
- Part Number: TS-0204-3105
- Product Name: GenV RacePort Blow-Off Valve Spring – 15 inHg, Green
- Product Type: Blow-Off Valve Replacement / Tuning Spring
- Spring Vacuum Rating: 15 inHg
- Approximate Vacuum Equivalent: 50.8 kPa / 7.37 PSI
- Spring Color: Green
- Spring Position: Outer
- Recommended Standalone Idle Vacuum Range: 11–15 inHg
- Compatible Product Series: Turbosmart GenV RacePort Blow-Off Valves
- Installation Location: Internal RacePort Spring Chamber
- Vehicle Fitment: Universal, Based on Blow-Off Valve Compatibility
15 inHg Spring Rating
The TS-0204-3105 features a nominal spring rating of 15 inches of mercury.
InHg is a measurement of pressure commonly used to describe engine manifold vacuum.
Blow-off valve springs are selected according to the amount of vacuum an engine produces at idle.
The correct spring helps maintain proper valve seating while allowing the blow-off valve to respond to changes in manifold pressure.
Important: The 15 inHg rating is a vacuum-based spring specification. It is not a turbocharger boost pressure rating and does not indicate the maximum boost pressure the blow-off valve can handle.
Recommended Manifold Vacuum Range
Turbosmart's GenV RacePort spring selection chart recommends the green 15 inHg spring for engines producing approximately 11–15 inHg of manifold vacuum at idle.
This range applies when the green spring is installed by itself.
Engines with modified camshafts or other performance upgrades may produce different manifold vacuum levels than factory engines.
Measure actual manifold vacuum at operating temperature before selecting a replacement spring.
Green Color Identification
Turbosmart uses color-coded springs to distinguish between different vacuum ratings.
The TS-0204-3105 is identified by its green finish.
Color coding helps installers quickly identify the spring during maintenance or tuning.
Always confirm the part number and spring rating rather than relying exclusively on color.
GenV RacePort Compatibility
The TS-0204-3105 is designed for compatible Turbosmart GenV RacePort blow-off valves.
The spring installs inside the blow-off valve actuator assembly and works with the diaphragm to establish the valve's operating characteristics.
It is not intended as a universal replacement for unrelated Turbosmart blow-off valve families.
Outer Spring Configuration
The green 15 inHg spring is classified as an outer spring in Turbosmart's RacePort spring selection system.
It can operate independently or in approved combinations with compatible inner springs.
The correct configuration depends on the engine's measured idle vacuum.
RacePort Spring Combinations
Turbosmart provides several approved spring combinations for different manifold vacuum ranges.
Green Spring Only – TS-0204-3105
Green outer spring.
Nominal 15 inHg rating.
Recommended idle vacuum range: 11–15 inHg.
Green Spring + Pink Inner Spring
Green outer spring rated at 15 inHg.
Pink inner spring rated at 4 inHg.
Recommended idle vacuum range: 15–19 inHg.
Green Spring + Orange Inner Spring
Green outer spring rated at 15 inHg.
Orange inner spring rated at approximately 7 inHg.
Recommended idle vacuum range: 19–23 inHg.
These combinations are based on Turbosmart's GenV RacePort spring selection chart.
The pink and orange inner springs are sold separately.
Green vs. Blue RacePort Spring
The green and blue springs are both available for the RacePort platform but are intended for different vacuum conditions.
Green Spring – TS-0204-3105
15 inHg nominal rating.
Green color.
Outer spring.
Recommended standalone idle vacuum range: 11–15 inHg.
Blue Spring – TS-0204-3102
18 inHg nominal rating.
Blue color.
Outer spring.
Recommended standalone idle vacuum range: 14–18 inHg.
The blue spring is commonly supplied as the standard spring in applicable RacePort blow-off valve assemblies.
The green spring provides an alternative for engines requiring a different spring configuration.
Importance of Proper Spring Selection
An incorrectly selected blow-off valve spring can affect valve operation.
A spring that is too stiff for the engine's manifold vacuum may prevent the valve from opening as intended.
A spring that is too soft for the application may contribute to unwanted valve opening or inconsistent sealing.
Selecting the appropriate spring helps maintain predictable blow-off valve behavior.
Turbosmart recommends using a stiffer spring only when necessary.
Blow-Off Valve Operation
A blow-off valve releases excess compressed intake air when the throttle closes.
During boost, pressure forces act on the valve to help maintain sealing.
When the throttle closes, the resulting pressure differential allows the valve to open and release compressed air.
The spring contributes to the valve's operating characteristics and must be matched to the engine's vacuum conditions.
High-Performance Engine Applications
Modified engines frequently produce different idle vacuum levels than factory configurations.
Aggressive camshaft profiles, altered idle settings, and other engine modifications can influence vacuum.
The TS-0204-3105 provides a tuning option for compatible RacePort-equipped engines requiring the green 15 inHg spring.
Common Reasons for Replacement
Incorrect Blow-Off Valve Spring: Replaces a spring that does not match the engine's idle vacuum.
Modified Engine Vacuum Characteristics: Supports tuning after camshaft or engine modifications.
RacePort Blow-Off Valve Maintenance: Provides a genuine replacement spring.
Replacing a Damaged Spring: Restores the intended spring configuration.
Blow-Off Valve Tuning: Allows adjustment of the RacePort's operating characteristics.
Turbocharger System Upgrades: Supports recalibration of compatible blow-off valve systems.
Engine Rebuilds: Provides an opportunity to verify spring selection.
Naturally Aspirated to Turbo Conversions: Supports setup of an aftermarket RacePort blow-off valve.
High-Performance Camshaft Installations: Helps match spring selection to altered manifold vacuum.
Inconsistent Blow-Off Valve Operation: Provides an appropriate replacement when spring selection is identified as the cause.
Competition Vehicle Maintenance: Supports routine inspection and servicing of RacePort assemblies.
Installation Notes
Verify Blow-Off Valve Compatibility: Confirm that the installed valve is compatible with TS-0204-3105.
Measure Engine Manifold Vacuum: Determine the engine's actual idle vacuum before selecting the spring.
Review Turbosmart Instructions: Follow the current GenV RacePort installation and servicing procedure.
Allow the Engine to Cool: Avoid working around hot turbocharger and engine components.
Remove the Blow-Off Valve if Necessary: Provide safe access to the actuator assembly.
Clean the Exterior: Remove dirt and debris before opening the valve.
Release Spring Tension Carefully: The actuator spring may be under compression.
Remove the Locking Collar: Use the appropriate Turbosmart service tool.
Open the Actuator Assembly: Carefully separate the components according to the manufacturer's instructions.
Remove the Existing Spring: Inspect the original spring for wear or damage.
Inspect the Diaphragm: Check for tears, deformation, or deterioration.
Inspect the Valve Components: Confirm that the valve moves freely and seals correctly.
Install the Green Spring: Position the TS-0204-3105 in the designated outer spring location.
Install Additional Springs if Required: Use only approved combinations from Turbosmart's spring selection chart.
Verify Spring Seating: Ensure the spring is correctly positioned.
Reassemble the Actuator: Follow the manufacturer's recommended procedure.
Secure the Locking Collar: Confirm that the assembly is fully seated and locked.
Reinstall the Blow-Off Valve: Secure the valve and mounting components.
Reconnect the Vacuum Reference Line: Ensure the hose is connected to the correct manifold pressure source.
Inspect for Leaks: Check the valve and reference hose connections.
Verify Idle Operation: Confirm that the valve remains properly seated during normal engine operation.
Perform Controlled Initial Testing: Monitor valve response during throttle changes.
Inspect After Installation: Recheck all connections and verify consistent operation.
Important: Do not select a blow-off valve spring based solely on turbocharger boost pressure. The correct RacePort spring configuration is determined primarily by engine manifold vacuum and Turbosmart's spring selection recommendations.
What's Included
(1) Turbosmart GenV RacePort 15 inHg Green Replacement Blow-Off Valve Spring (TS-0204-3105)
Note: This listing includes the replacement spring only. The RacePort blow-off valve, additional springs, diaphragm, locking collar tool, mounting hardware, and other accessories are sold separately.
Maintain proper blow-off valve operation with the Turbosmart GenV RacePort 15 inHg Green Replacement Spring (TS-0204-3105).
Featuring a 15 inHg nominal vacuum rating, green color coding, and direct compatibility with the Turbosmart RacePort spring system, this genuine replacement spring provides an effective solution for servicing or tuning compatible blow-off valves.
Whether fine-tuning a turbocharged Honda K20/K24, replacing an incorrectly matched spring, or maintaining a dedicated motorsport vehicle, the Turbosmart TS-0204-3105 delivers genuine Turbosmart fitment and dependable spring performance.
| Part Number: | TS-0204-3105 |
| Brand: | Turbosmart |
| Color: | Green |
| 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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