Performance Springs Nissan RB20 Valve Spring Set
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Valve Spring Set for Nissan RB20 Engines
This spring assembly is suited to RB20DE/DET applications requiring additional spring load to support increased RPM or mild-to-moderate camshaft upgrades. The design provides stable valve control while maintaining compatibility with factory retainers and locks.
Spring Characteristics
- O.D.: 1.085"
- I.D.: 0.780"
- Installed: 85 lbs at 34.8 mm
- Open: 185 lbs at 10 mm lift
- Maximum Valve Lift: 10.5 mm
- Coil Bind: 0.890"
Appropriate for turbocharged and naturally aspirated RB20 configurations requiring improved valvetrain stability.
| Product Name | Performance Springs Nissan RB20 Valve Spring Set |
|---|---|
| Brands | Performance Springs |
| Engine | RB20, RB20DET |
| Make | Nissan |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
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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 for the RB20 can accommodate up to 10.5mm of valve lift. Ensure your camshaft profile is compatible with this specification to prevent coil bind.
Can I use these valve springs with stock retainers?
Yes, these valve springs are designed as a drop-in setup and can be used with the stock retainers and locks, making installation straightforward.
What is the spring pressure at 10mm lift?
At 10mm of valve lift, these springs provide a pressure of 185 lbs. This is suitable for performance applications where increased lift is required.
Is coil bind a concern with these springs?
Yes, the coil bind height for these springs is .890 inches. It's important to ensure that your valve lift does not exceed this measurement to avoid damaging the springs.
What are the outer and inner diameters of these valve springs?
The outer diameter of the Performance Valve Springs is 1.085 inches, and the inner diameter is .780 inches. These dimensions are crucial for ensuring proper fitment in the RB20 head.
