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Contents : 1 x ACL Main Bearing Set
Over Size: 0.001 (0.001" Extra Oil Clearance)
Note : +.002¡± O/S Hsg
Brand : ACL
Suit :
Subaru Impreza GC GC5 GC6 GF GF5 GF6 GDA GGA Liberty B13 BC BC7 BCB BD BD6 BD9 BD7 BE BE9 BF BF6 BFB BG BG6 BG7 BH BH9 BL BL5 BL9 BP BP5 BP9 Forester SG SG9 SH SH9 EJ18/EJ20/EJ22/EJ25 EJ20T/EJ20TT/EJ22T/EJ25T Turbo/Twin Turbo 1820cc/1994cc/2212cc/2457cc H4
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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 reliable fit and helps maintain consistent clearances. |
1.Bearing Material Enhancements
A blend of characteristics to provide high strength and excellent seizure resistance.
No flash plating is applied to further improve bearing retention and maximise heat transfer. |
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2.Bearing Design Enhancements Crush increased for:
Improved bearing retention from higher radial contact pressure. Locks the bearing into the housing. More effective heat dissipation through improved thermal transfer.
Bearing Eccentricity
Definition: Gradual reduction in wall thickness between the crown and parting line. ACL Race Series performance engine bearings feature increased eccentricity to increase improve shape adaptation to compensate for bore distortion at high speed operation.
Assists in the formation of hydrodynamic oil film. |
Main Bearings with Extended Grooves
Full (180°) grooved uppers with matching partial groove in lowers.
Reduces interruption to big end oil supply. Tapered groove run-out.
Smooths big end supply cut-off avoiding pressure pulsing and cavitation.
Enlarged ID Chamfers
Accommodate larger fillet radii on performance crankshafts. |
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The ACL RACE Series performance engine bearing range of today has a strong pedigree in motorsport & traces, its roots back to the 1960's with the manufacture of engine bearings for use in the world conquering Brabham Formula.
Further experience in the Australian Supercars Championship & numerous other race codes has culminated in the current ACL RACE Series technology platform. The unique combination of design, metallurgy, engineering & precision quality control come together to deliver what engine builders expect from performance engine bearings.
