Forged Pistons for Nissan RB25 86.5 8.5:1 (CP Pistons SC7308)
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|
Make |
Nissan |
|
Model |
RB25DET |
|
Part Number |
SC7308 |
|
Cylinders |
6 |
|
Bore (in) |
3.406 |
|
Bore (mm) |
86.5 |
|
Size |
+0.5mm |
|
Stroke |
71.7 |
|
Conrod |
121.5 |
|
Comp Height (in) |
1.24 |
|
Comp Height (mm) |
31.5 |
|
Dom/Dish CC |
11.2 |
|
Compression Ratio |
8.5 |
|
Weight (Grams) |
361 |
|
Pin (mm) |
21 |
|
Rings |
CPN-3406 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
827-2250-20CP1C |
|
Upgraded Pin |
827-2250-20CP3C |
|
Ultra Duty Pin |
827-2250-25CP3C |
|
Locks |
827x063 SWL |
CP pistons are compatible with oversized valves and high lift camshafts. CP Pistons represent the highest quality and is engineered for maximum power. Standard features include: 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 at no additional cost; Double pin oilers force fed from oil ring groove; Pin lock grooves for easy lock removal; Pin fitting included.
| Product Name | Forged Pistons for Nissan RB25 86.5 8.5:1 (CP Pistons SC7308) |
|---|---|
| Brands | CP Carrillo |
| Engine | RB25 |
| Make | Nissan |
Delivery & Freight
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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 recommended bore clearance for the SC7308 pistons?
For the SC7308 pistons, a typical bore clearance of 0.0015" to 0.0025" is recommended. However, it's essential to check with your engine builder as clearance may vary based on specific application and intended use.
What compression ratio can I expect with the SC7308 pistons in my RB25DET?
The SC7308 pistons provide a compression ratio of 8.5:1 when used with the appropriate cylinder head and gasket setup. Ensure that your engine's overall design supports this ratio for optimal performance.
Are the SC7308 pistons compatible with high lift camshafts?
Yes, the SC7308 pistons feature deep valve reliefs designed to accommodate high lift camshafts, making them suitable for performance builds that require increased airflow.
What type of wrist pins are included with the SC7308 pistons?
The SC7308 pistons come with standard wrist pins (827-2250-20CP1C) included at no additional cost. Upgraded and ultra-duty pins are available for those seeking enhanced performance.
Do I need to machine the SC7308 pistons for my RB25DET?
While the SC7308 pistons are fully CNC machined, it's crucial to verify that they fit properly in your specific engine. Depending on your engine's condition and modifications, additional machining may be necessary to achieve the correct fit and clearance.
