ACL Race Main Bearings 7M7989-STD (93-98) Toyota Pickup 1FZ FE - Engine
ACL Race Main Bearings 7M7989-STD (93-98) Toyota Pickup 1FZ FE - Engine:
- Improved Fatigue Properties due to a High Strength Overlay Plate with reduced thickness.
- 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.