BMW N54/N55/S55B30 INLINE 6, ACL Race Series Conrod Bearings (6B1584H)
Enhance the performance of your BMW N54, N55, or S55B30 inline 6 engine with the ACL Race Series Conrod Bearings (6B1584H). Specifically engineered to endure higher RPM conditions, these bearings are a top choice for automotive enthusiasts and professionals alike. Designed for 4, 6, and 8 cylinder applications, they offer superior durability and reliability.
High Strength Overlay Plate: Features a reduced thickness for enhanced performance.
Hardened Steel Backs: Provides robust support for all conrod bearings.
Increased Crush: Eliminates flash plating for improved fit and function.
3/4 Grooving: Main bearings are designed with 3/4 grooving to ensure optimal oil supply.
Consistent Wall Tolerances: Ensures precision and reliability in every bearing.
Oversize Chamfers: Available where applicable for enhanced fitment.
More Information
Product Name
BMW N54/N55/S55B30 INLINE 6, ACL Race Series Conrod Bearings (6B1584H)
Brands
ACL
Engine
N55B30 - S55B30
Make
BMW
Delivery & Freight
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
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 Conrod Bearings for the BMW N54/N55/S55B30?
The ACL Race Series Conrod Bearings (6B1584H) feature a high strength overlay plate with reduced thickness for enhanced performance, hardened steel backs for robust support, and increased crush to eliminate flash plating. They also include 3/4 grooving for optimal oil supply and consistent wall tolerances for precision and reliability.
Do I need to modify the conrod or crankshaft when using these bearings?
Typically, no modifications are required for the conrods or crankshaft when using the ACL Race Series Conrod Bearings. However, it is crucial to ensure that the bearing clearances are set correctly according to your engine's specifications and that the crankshaft is properly machined and polished.
What is the recommended installation procedure for these conrod bearings?
When installing the ACL Race Series Conrod Bearings, ensure that the bearing surfaces are clean and free of debris. Apply a suitable assembly lubricant to the bearing surfaces before installation. Follow the manufacturer's torque specifications for the conrod bolts to ensure proper clamping force.
Are these bearings suitable for high-performance applications?
Yes, the ACL Race Series Conrod Bearings are specifically engineered for high-performance applications, making them suitable for use in BMW N54, N55, and S55B30 engines operating at higher RPMs. However, ensure that your engine is properly built and tuned to maximise reliability and performance.
What should I check after installation of these bearings?
After installation, it is essential to check the bearing clearances using a micrometer or feeler gauges to ensure they meet the required specifications. Additionally, monitor oil pressure during initial startup and break-in to confirm proper lubrication and function of the bearings.
