ACL Race Series are trimetal main bearings designed for higher RPM conditions and increased engine loads. Their combination of construction, metallurgy and engineering supports consistent bearing performance.
Increased eccentricity helps compensate for bore distortion at high RPM and assists in forming hydrodynamic oil films. The set includes ACL Race Series main bearings.
- High-strength overlay plate with reduced thickness for improved fatigue properties
- Increased crush for improved bearing retention in the housing
- Elimination of flash plating on the back for improved heat transfer and grip between the bearing and its housing
- 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 maintain consistent clearances
- Enlarged ID chamfers on bearing edges where required for large fillet radii on performance crankshafts
Suitable for: Ford Laser I (KF/KH), Mazda MX 5 II (NB).
Engines: B6, BP, Mazda B6, B5, B3, Mazda B3, Mazda B5, Mazda Z, B1, BPD, Z5 (MAZDAB6T, MAZDAB6Y, MAZDAB6D, MAZDAB6, MAZDAB3, MAZDAB5, ZMD, B1, B3-MI, B3, B5-ME, B5-MI, B6T, B6-2E, B6-ME, BP, B6, B6F, B5, BPD, B6D, BP-T, BP-Z3, BP-4W …). Please check your vehicle’s engine code (registration document or VIN) before ordering; if in doubt, contact us and we will check for you.
Sizes
STD is the standard size for an unground crankshaft. Undersizes (−0.25 mm, −0.50 mm …) are for a reground crank, and “+0.025 mm clearance” (X) is for highly stressed engines. Your machine shop chooses the size after measuring.
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