Nissan RB25 NEO Spool H Beam Conrods and Ross Forged Pistons
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Spool RB25NEO Forged Connecting Rods and Ross Racing Forged Pistons
This Package includes:
- Spool Forged H Beam Conrods (ARP 2000 3/8 Bolts)
- Custom Ross Racing Forged Pistons (Rings, Pins and Locks)
Ross Racing Pistons Feature:
These Pistons are custom made for Spool and rated at 900-1000hp by Ross Racing Pistons.With upgrade pins Ross rate these pistons up to 250 bhp per cylinder.
- Compression Ratio: 9.0:1
- Bore Sizes: +0.5mm and +1mm
- Pistons come with NPR Gas Nitrided top ring, three pcs. oil
- 0.225” wall Carbon steel (upgrade to H13 available)
- Forged 2618
- Locks
All of Ross Racing Pistons (since 1985) have been forged from 2618 billet bar stock and have been heat treated and aged to a T61 condition (2618-T61). 2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers.
This material has less than 1% silicon particulate content. High silicon content pistons (forged from 4032 or MS75) will not stand up to the most extreme stress placed on many racing pistons. If a crack starts to form in a high silicon piston it will continue until the piston experiences a catastrophic failure. Simply stated, adding sand to the aluminum only makes it more brittle. In the rare instance of a 2618-T61 piston cracking, the crack will continue to an area where the stress is not as great and will then stop. Another advantage of 2618-T61 over the high silicon pistons is the ability to keep its shape under extreme pressure and high RPM's. "Skirt Shrinking" is not a problem with ROSS Racing Pistons.
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
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout. If you are unsure get in touch with [email protected]
Note: We recommend Joe Gibbs Break in Oil for all new engines.
| Product Name | Nissan RB25 NEO Spool H Beam Conrods and Ross Forged Pistons |
|---|---|
| Brands | Spool |
| Engine | RB25 NEO |
| 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:
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 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 is the maximum power rating for the Ross Racing pistons included in this kit?
The Ross Racing pistons in the SPL-RB25NEO-H-Ross kit are rated for 900-1000hp. With upgraded pins, they can handle up to 250 bhp per cylinder. However, actual performance will depend on factors such as tuning, fuel quality, and engine setup.
What are the recommended bore sizes for the Ross Racing pistons?
The Ross Racing pistons come in bore sizes of +0.5mm and +1mm. Ensure that your engine block is machined to the correct specifications to accommodate these piston sizes.
What type of fasteners are used in the Spool conrods, and what are their torque specifications?
The Spool conrods feature ARP2000 fasteners. For 3/8" bolts, the recommended torque is around 55 ft-lb when using ARP Ultra-Torque lubricant. Always refer to ARP's latest instructions for the most accurate specifications.
Do the conrods require any specific machining before installation?
Yes, the conrods may require big-end or small-end honing to ensure proper fitment due to factory journal and pin size variations. It's essential to check clearances and fitment before installation.
What is the recommended compression ratio for the pistons in this kit?
The pistons in the SPL-RB25NEO-H-Ross kit have a compression ratio of 9.0:1. Ensure that your engine's setup is compatible with this compression ratio for optimal performance.
