ACL Race Series Main Bearing Set Suit LS1, LS2, LS3, LS7, LSA Engine

Sizes	STD, 001, 002, 010, 020
Oil Clearance
Half Type	Upper & lower
Material	F780
Min. Std Shaft Size	64,993 mm / 2.5588 in
Max. Std Shaft Size	65,007 mm / 2.5593 in
Min. Std Tunnel Size	69,873 mm / 2.7509 in
Max. Std Tunnel Size	69,887 mm / 2.7515 in
Max Wall at Crown	2,43 mm / 0.0957 in
Max Overall Length	26,1 mm / 1.0276 in (7299H(F)) 20,45 mm / 0.8051 in (7298H)
Notes
Diagrams	7298H-L (1,2,4,5) 7298H-U (1,2,4,5) 7299H-L (3) 7299H-U (3)

• 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.

Application