Spool CP Custom RB30ET (SOHC Head) Pistons 8.5:1
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These Spool CP Custom Pistons are available in:
- Bore: +0.5mm
- Comp Ratio: 8.5:1
- 5310 Series Pins
Note: Also available in any bore size and comp ratio – please email for details.
CP Pistons standard features include:
- 5310 gudgeon pins (9310 thicker wall thickness pins are available as an upgrade)
- Deep valve reliefs accommodate high lift camshafts
- Larger valve reliefs for +1mm valve sizes
- Custom skirt cam and barrel design
- Accumulator grooves
- High strength aluminum forgings
- High performance rings
- Fully CNC machined and balanced to +/- 1 gram
- Wrist pins included
- Double pin oilers force fed from oil ring groove
- Pick lock grooves for easy lock removal
- Pin fitting included
| Product Name | Spool CP Custom RB30ET (SOHC Head) Pistons 8.5:1 |
|---|---|
| Brands | CP Carrillo |
| Engine | RB30, RB30ET (SOHC) |
| Make | Holden, 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:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
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 recommended bore size for the Spool CP Custom RB30ET pistons?
The Spool CP Custom RB30ET pistons are designed for a bore size of +0.5mm over standard. Ensure that your engine block is machined to this specification for optimal fitment.
What compression ratio do these pistons provide?
These pistons have a compression ratio of 8.5:1, which is suitable for applications requiring a balance between performance and reliability, especially in turbocharged setups.
What type of gudgeon pins are included with these pistons?
The Spool CP Custom RB30ET pistons come standard with 5310 series gudgeon pins. An upgrade to thicker wall 9310 pins is available for those seeking additional strength.
Do these pistons accommodate high lift camshafts?
Yes, the pistons feature deep valve reliefs designed to accommodate high lift camshafts, making them suitable for performance applications where increased lift is required.
How are these pistons manufactured?
These pistons are made from high strength aluminium forgings and are fully CNC machined and balanced to within +/- 1 gram, ensuring precision and performance consistency.
