Nissan RB30DET (RB25/26 Head) Spool Drag Pro I Beam Conrods and CP Forged Pistons (8.5:1)
Nissan RB30DET (RB25/26 Head) Spool H Beam Conrods and CP Forged Pistons (8.5:1)
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These are a flat top piston with no valve reliefs
These CP forged pistons are available in est. 8.2:1 - 8.5:1 compression ratio for the RB30DET ( using RB25 or RB26 cylinder head)
Pistons are available in:
- Compression Ratio: est. 8.2:1 - 8.5:1
- Bore Sizes: STD, +0.5mm and +1mm
- Pistons come with rings, gudgeon pins and pin locks
Spool Connecting Rods Feature:
- ARP 2000 fasteners (L19 fasteners are available as an upgrade)
- High tensile 4340 forged steel
- 2 Piece forging
- Hardness of HRC36-42
- Dowelled caps for precision alignment
- X-RAY & Sonic tested
- Quenching and heat treated
- Shot peened
- 100% Magnafluxed
- Weight Matched Sets +/- 1 gram
- Vacuum degassed to remove impurities
CP Pistons standard features include:
- 5310 gudgeon pins (9310 thicker wall thickness pins are available as an upgrade)
- Custom skirt cam and barrel design
- Accumulator grooves
- High strength aluminium 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
Note: We recommend Joe Gibbs Break in Oil for all new engines.
| Product Name | Nissan RB30DET (RB25/26 Head) Spool H Beam Conrods and CP Forged Pistons (8.5:1) |
|---|---|
| Brands | Spool |
| Engine | RB30DET (DOHC) |
| Make | Holden, Nissan |
Delivery & Freight
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
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What is included in a typical Spool engine kit?
Kits usually include pistons, rings, rods, bearings and related hardware depending on the engine family. Check the listing for exact inclusions.
Do I still need machining with a full engine kit?
Yes. The block must be honed and all clearances checked and set by your builder. Assembly should only occur after full measurement and verification.
What compression ratio do the CP forged pistons provide for the RB30DET?
The CP forged pistons included in this kit offer an estimated compression ratio of 8.2:1 to 8.5:1, suitable for use with the RB25 or RB26 cylinder head.
What are the benefits of the H Beam conrods in this kit?
The H Beam conrods are made from high tensile 4340 forged steel, featuring ARP2000 fasteners for reliability. They are designed for precision alignment with dowelled caps and have undergone extensive testing, including X-RAY and Magnafluxing, ensuring they can handle high power applications.
Do I need to modify the pistons for valve clearance?
These pistons are flat top with no valve reliefs, which may require careful consideration of valve clearance depending on your specific engine setup. It's advisable to check clearances during assembly to avoid any interference.
What is the recommended oil for breaking in the engine after installation?
We recommend using Joe Gibbs Break in Oil for all new engines to ensure proper lubrication and protection during the critical break-in period.
What bore sizes are available for the pistons in this kit?
The pistons in this kit are available in standard bore size as well as +0.5mm and +1mm options, allowing for flexibility depending on your engine's requirements.
