SUBARU EJ16/18/20/22/25, ACL Race Series Main Bearings (5M8297H)
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High-Performance ACL Race Series Main Bearings for Subaru EJ16/18/20/22/25
Upgrade your Subaru EJ16/18/20/22/25 engine with ACL Race Series Main Bearings (5M8297H), engineered for superior performance under high RPM conditions. These bearings are perfect for enthusiasts and professionals seeking reliability and durability in demanding environments.
- High Strength Overlay Plate: Features a reduced thickness for enhanced performance.
- Hardened Steel Backs: All Conrod Bearings come with hardened steel backs for added strength.
- Increased Crush: Designed to eliminate flash plating, ensuring a secure fit.
- 3/4 Grooving: Main Bearings include 3/4 grooving for optimal oil supply.
- Consistent Wall Tolerances: Ensures precision and reliability.
- Oversize Chamfers: Available where applicable for improved fitment.
Explore the full range of ACL Race Series Engine Bearings for unmatched performance and quality.
| Product Name | SUBARU EJ16/18/20/22/25, ACL Race Series Main Bearings (5M8297H) |
|---|---|
| Brands | ACL |
| Engine | EJ16, EJ18, EJ20, EJ22, EJ25 |
| Make | Subaru |
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 are the key features of the ACL Race Series Main Bearings for Subaru EJ engines?
The ACL Race Series Main Bearings (5M8297H) feature a high-strength overlay plate with reduced thickness for enhanced performance, hardened steel backs for added strength, and increased crush to eliminate flash plating. They also include 3/4 grooving for optimal oil supply and consistent wall tolerances for precision.
Do I need to perform any machining before installing these main bearings?
Yes, it is essential to ensure that the main bearing journals are properly machined to the correct specifications. This may include line boring of the main caps after installation to achieve the necessary clearances for the ACL Race Series Main Bearings.
What is the recommended clearance for these main bearings in a Subaru EJ engine?
Clearances for the ACL Race Series Main Bearings depend on the specific application and engine build. It is crucial to consult the manufacturer's specifications and adjust clearances based on your engine's intended use, whether for street or race conditions.
Are these main bearings suitable for high RPM applications?
Yes, the ACL Race Series Main Bearings are specifically engineered for high-performance applications and can handle the demands of high RPM conditions. However, proper installation and machining are critical to ensure reliability and performance.
What oil should I use with these main bearings for optimal performance?
Using a high-quality engine oil that meets or exceeds the requirements for your Subaru EJ engine is recommended. Ensure that the oil has the appropriate viscosity for your operating conditions, especially if you are running the engine at high RPMs.
