ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world. Race Series rod and main bearings are standard components in Race engines that have set records and won championships from Mexico to Bonneville – from sport compact drift racing to small block NASCAR, IHRA and NHRA cmpetitions. The unique combination of design, metallurgy and engineering provides Race Series performance bearings with the endurance and capability to perform where others cannot. These exceptional bearings are available for a variety of American, Asian and European performance engines.
MAIN BEARING - STDHX - EXTRA OIL CLEARANCE SET (-0.025MM)
- High performance Trimetal engine bearings
- Designed to withstand higher RPM conditions
- High strength overlay plate with reduced thickness for improved fatigue properties
- Designed for High Rev / High HP Builds
4M8599HX-STD
Specifications for STD size only
| Sizes |
STD |
| Oil Clearance |
|
| Half Type |
Upper & lower |
| Material |
F780 |
| Min. Std Shaft Size |
68,942 mm / 2.7142 in |
| Max. Std Shaft Size |
68,96 mm / 2.7150 in |
| Min. Std Tunnel Size |
mm / 0.0000 in |
| Max. Std Tunnel Size |
73,5 mm / 2.8937 in |
| Max Wall at Crown |
2,263 mm / 0.0891 in |
| Max Overall Length |
18,1 mm / 0.7126 in
|
| Notes |
|
| Diagrams |
|
- 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.
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