Spool Nissan RB25 H beam Conrods
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All Spool Conrods come standard with ARP 2000 Fasteners.
These are a direct fit conrod for all Nissan RB25 engines.
These conrods feature:
- 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.
- Side oil squirters
No bearings are included.
Specifications:
Small End Pin Size: 21mm
Weight: 595g
We have customers making over 1000 RWHP with Spool Conrods, check out the project cars here.
| Product Name | Spool Nissan RB25 H beam Conrods |
|---|---|
| Brands | Spool |
| Engine | RB25 |
| 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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If you have issues calculating freight, please get in touch. We are happy to help.
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 bolts do these conrods use and how should I tighten them?
These rods use ARP conrod bolts, usually ARP2000 as standard with L19 or CA625+ available on some models. ARP2000 bolts are generally torqued to around 55 ft-lb for 3/8 inch and around 75 ft-lb for 7/16 inch when using ARP Ultra-Torque lube. L19 bolts must be tightened by stretch, not torque. Always refer to the latest ARP instructions for exact specifications.
Do these conrods have a horsepower rating or warranty?
No. Like other performance rods, they do not carry a horsepower or performance warranty. Spool warrants workmanship before installation, but once fitted, power handling depends entirely on machining, clearances, tuning, fuel, boost level and rpm.
Do the big end and small end need machining?
They often do. Crank journals and pin bores vary between engines, so your builder should measure the big end oil clearance and small end pin clearance and hone as required before assembly.
What is the recommended machining for the Spool RB25 H beam conrods?
While the Spool RB25 H beam conrods are designed as a direct fit, it's advisable to check the big-end and small-end sizes for proper fitment. Depending on your specific engine's tolerances, honing may be required to achieve the correct clearances.
What are the benefits of the 2 piece forging design in these conrods?
The 2 piece forging design enhances the strength and durability of the conrods by allowing for better alignment and distribution of stress. This design also contributes to the overall weight reduction while maintaining structural integrity, making them suitable for high-performance applications.
How do the side oil squirters on these conrods benefit engine performance?
The side oil squirters help improve lubrication to the piston and cylinder walls, reducing friction and wear during operation. This feature is particularly beneficial in high-performance applications where engine temperatures and stresses are elevated.
What is the significance of the weight-matched sets for these conrods?
Weight-matched sets ensure that all conrods in a given set are within +/- 1 gram of each other. This consistency is crucial for maintaining balance in the rotating assembly, which can lead to smoother engine operation and reduced vibration at high RPMs.
Are bearings included with the Spool RB25 H beam conrods?
No, the Spool RB25 H beam conrods do not come with bearings. You will need to source the appropriate bearings separately to ensure proper fitment and performance in your engine build.
