ACL Nissan Skyline RB25 RB30 +0.50mm High Performance Main Bearing Set
ACL Nissan Skyline RB25 RB30 0.50mm Oversized High Performance Main Bearing Set - acl7M2394H-.50
Description: Main Bearings; Tri-Metal; Upper & Lower; Flange in Position 4
Oil Clearance: Standard
Max Overall Length: 0.752" (19.12mm) w/ 2394H/HX 1.061" (26.95mm) w/ 2395H/HX Flange
Max Std Tunnel Size: 2.3094" (58.658mm)
Min Std Tunnel Size: 2.3089" (58.645mm)
Max Wall at Crown: 0.0719" (1.827mm)
Max Std Shaft Size: 2.1644" (54.975mm)
Min Std Shaft Size: 2.1634" (54.951mm)
The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings.
* *High strength overlay plate* with reduced thickness for improved fatigue properties
* *Hardened steel backs* on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing.
* *Increased crush* for improved bearing retention
* *Elimination of flash plating* on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing.
* *Increased eccentricity* to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films.
* *3/4 grooved Main Bearings* to optimize bearing load carrying surface area and oil flow to the conrod bearings.
* *Tight consistent wall tolerances* to help you maintain consistent clearances.
* *Enlarged ID chamfers* on bearing edges where required to accommodate large fillet radius on performance crankshafts.