Description
ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and crush. This ensures a reliable fit and helps maintain consistent clearances.
- 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 their 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 were required to accommodate a large fillet radius on performance crankshafts.
Specifications
ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and crush. This ensures a reliable fit and helps maintain consistent clearances.
- 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 their 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 were required to accommodate a large fillet radius on performance crankshafts.
Specifications
| Sizes | STD |
| Oil Clearance | |
| Half Type | Upper & lower |
| Material | F780 |
| Min. Std Shaft Size | 54,951 mm / 2.1634 in |
| Max. Std Shaft Size | 54,975 mm / 2.1644 in |
| Min. Std Tunnel Size | 58,645 mm / 2.3089 in |
| Max. Std Tunnel Size | 58,658 mm / 2.3094 in |
| Max Wall at Crown | 1,814 mm / 0.0714 in |
| Max Overall Length | 26,95 mm / 1.0610 in (2428HX(F))20 mm / 0.7874 in (2429HX) |
| Notes | |
| Diagrams |
Engine Compatibility:
– Nissan RB26DETT
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