ACL Race Main Bearings Set
Subaru EJ20/EJ22/EJ25 (Thrust Position 3)
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Description
Description
High performance driving demands that you use the best parts. So rely on ACL RACE Series Performance Engine Bearings to perform to the exacting race standards you expect. They provide the dependability it takes to hold up under higher RPM conditions.
The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance parts.
Features and Benefits
Features and Benefits
Main Bearing Features:
- High performance Trimetal engine bearings
- Designed to withstand higher RPM conditions
- High strength overlay plate with reduced thickness for improved fatigue properties
ACL Bearing Features:
- 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.
Technical Specifications
Technical Specifications
Specifications for STD size only
Sizes | STD, .025, .25, .50, STD w/ 0.001" Extra Oil Clearance |
Oil Clearance | Standard |
Half Type | Identical halves |
Material | F780 |
Min. Std Shaft Size | 59,984 mm / 2.3616 in |
Max. Std Shaft Size | 60 mm / 2.3622 in |
Min. Std Tunnel Size | 64 mm / 2.5197 in |
Max. Std Tunnel Size | 64,02 mm / 2.5205 in |
Max Wall at Crown | 2,005 mm / 0.0789 in |
Max Overall Length | 16,5 mm / 0.6496 in (8297H) 19 mm / 0.7480 in (8298H) 22,92 mm / 0.9024 in (8299H(F)) |
Notes | For engines with thrust in #3 position. Overwidth flanges for undersizes: Std=Std, .25=Std+.10mm, .50=Std+.18mm, .75 = Std+.26mm. |