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    ACL Race Main Bearings Mazda Miata BP 1.8
    SKU#: ACL-Main-Bearings-BP
    Quantity Note:
    Retail Price: $NaN


    Choose Your Options
    One often overlooked part when building an engine is the bearings. Getting a quality set of bearings can directly determine the longevity of your engine. We prefer to use ACL Race Bearings in all of our cars, and suggest them to all of our customers as well.

    ACL has various types of bearings. This is their RACE bearing which is meant for engines that will be reving higher than stock, and see more abuse than they were meant to from the factory. This is a performance bearing, not a factory oem-replacement bearing. 

    This bearing comes in multiple sizes which will be explained below:
    • "H" = Standard Size
    • "H-.25" = .25mm Thicker than stock. Use this when your crank is cut .010"
    • "H-.50" = .50mm Thicker than stock. Use this when your crank is cut .020"
    • "H-.025" = .025mm Thicker than stock. Use this when you need .001" less oil clearance.
    • "HX" = .025mm Thinner than stock. Use this when you need .001" more oil clearance.
    Manufacturer Description
    ACL Race Series Performance Engine Bearings

    The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings. Designed to withstand higher RPM conditions

    • 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.
    Included Ring Set Specifications
    Product Weight Specifications
    Outer Diameter Specifications
    Inertial Weight Specifications
    Shell Material Specifications
    Hub Material Specifications
    Compressor Wheel Inducer Specifications
    Exhaust Wheel Exducer Specifications
    Exhaust Housing A/R Specifications
    Exhaust Housing Inlet Specifications
    Exhaust Housing Outlet Specifications
    Compressor Housing Specifications
    Bearing Type Specifications
    Size Specifications
    Inlet Size Specifications
    Included Adapter Specifications
    Years Specifications
    Torque Rating Specifications
    Old Part Number Under SKU
    Thickness Specifications
    Competitor Interchange Part Number Under SKU
    Outer Spring Diameter Specifications
    Max Net Lift Specifications
    Valve Tip Length Specifications
    Inner Spring Diameter Specifications
    Seat Pressure Specifications
    Open Pressure Specifications
    Rate Inch Specifications
    Coil Bind Specifications
    Duration @ 1.27mm Specifications
    Lobe Separation Specifications
    Gross Lift Specifications
    Torque Specs Specifications
    Cam Duration Specifications
    Cam Lift Specifications
    Valve Head Size Specifications
    Valve Head Diameter Specifications
    Compression Ratio Specifications
    Face Type Specifications
    Pin Fit Specifications
    Small End Width Specifications
    Thickness Above Pin Specifications
    Dome CC Specifications
    Recommended Thrust Washer Specifications
    Recommended Main Bearings Specifications
    Flywheel Opening Specifications
    Pilot Bore Diameter Specifications
    Snout Diameter Specifications
    Flywheel Bolt Holes Specifications
    Rear Seal Design Specifications
    Minimum Rod Length Specifications
    Main Journal Diameter Specifications
    Rod Journal Specifications
    Intended Balance Specifications
    HP Rating Specifications
    Recommended Rod Bearings Specifications
    Gasket Thickness Specifications
    Head CC Specifications
    Car Model Specifications
    Engine Specifications
    Rod Bolt Specifications
    Part Weight Specifications
    Big End Width Specifications
    Big End Bore Specifications
    Beam Type Specifications
    Car Make Specifications
    Pin Size Specifications
    Compression Height Specifications
    Rod Length Specifications
    Stroke Specifications
    Bore Specifications
    Stem Diameter Specifications
    Valve Length Specifications
    Material Specifications
    Bore Size Specifications
    Impedance Specifications
    Nozzle Specifications
    Standard Pin (Included) Specifications
    Upgraded Pin (Not Included) Specifications
    Pin Locks (Included) Specifications
    Ring Part# Specifications

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