Performance Springs Nissan RB20 Valve Spring Set
Performance Valve springs Nissan FJ20 DOHC Valve Spring Set
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Valve Spring Set for Nissan FJ20 DOHC Engines
This high-load valve spring pack is engineered for the FJ20 DOHC cylinder head, providing stability for engines operating with increased RPM limits or higher valve lift camshafts. The spring profile is designed to support turbocharged applications where elevated cylinder pressures demand improved valve control.
Spring Characteristics
- Seat Pressure: 90 lbs
- Open Pressure: 215 lbs at 11 mm lift
- Maximum Valve Lift: 11 mm
- Configuration: Drop-in replacement
The material and heat-treatment specification ensure fatigue resistance for high-cycle operation, typical of performance-oriented FJ20 builds.
| Product Name | Performance Valve springs Nissan FJ20 DOHC Valve Spring Set |
|---|---|
| Brands | Performance Springs |
| Engine | F20 |
| Make | Nissan |
Delivery & Freight
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the maximum valve lift these springs can handle?
The Performance Valve Springs PS-2003D-16 are rated for a maximum valve lift of 11mm. This makes them suitable for high-performance applications, particularly when turbocharging the Nissan FJ20 engine.
What are the installed and open pressures for these valve springs?
These valve springs have a seated tension of 90 lbs and an open pressure of 215 lbs at 11mm valve lift. Ensure these specifications are met during installation for optimal performance.
Are these valve springs a direct fit for the FJ20 engine?
Yes, the PS-2003D-16 valve springs are designed as a simple drop-in fit for the Nissan FJ20 DOHC engine, making installation straightforward for engine builders.
Can I use these springs with stock camshafts?
While these springs can be used with stock camshafts, they are specifically designed for high-performance applications. If using aggressive cam profiles, ensure compatibility with the spring specifications.
What should I check before installing these valve springs?
Before installation, verify that the spring seats and retainers are in good condition. Additionally, check for proper clearance and ensure the springs are installed with the correct tension to avoid valve float at high RPM.
