ACL Race Series Engine Bearings 8B1663H-STD

If you’re looking to boost the performance of your classic Chevrolet, the ACL Race Series Engine Bearings (8B1663H-STD) are engineered to meet the demands of high RPM conditions. These tri-metal bearings are designed with a unique combination of advanced metallurgy and precision engineering, ensuring they can withstand the rigors of spirited driving and racing.

Fitment

The 8B1663H-STD is compatible with:

• Chevrolet Bel Air (1950-1969, 1971-1975, 1981)
• Chevrolet Corvette (1975-1982, 1984-2013)

Key Features

• High-strength overlay plate with reduced thickness for enhanced fatigue resistance.
• Hardened steel backs on all rod bearings improve support and retention within the housing.
• Increased crush for superior bearing retention during high-stress situations.
• Eliminated flash plating on the back of the bearings enhances heat transfer and grip.
• Increased eccentricity helps mitigate bore distortion at high RPMs, promoting effective hydrodynamic oil film formation.
• 3/4 grooved main bearings optimize load-carrying surface area and oil flow to the conrod bearings.
• Tight wall tolerances ensure consistent clearances, crucial for high-performance applications.
• Enlarged ID chamfers on bearing edges accommodate larger fillet radii on performance crankshafts.

Specifications

• Size: STD, 001, 010
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal with Hardened Steel Backs
• Min Standard Shaft Size: 1.8885 in / 47.968 mm
• Max Standard Shaft Size: 1.889 in / 47.981 mm
• Min Standard Tunnel Size: 2.015 in / 51.181 mm
• Max Standard Tunnel Size: 2.0155 in / 51.194 mm
• Max Wall at Crown: 0.0625 in / 1.588 mm
• Max Overall Length: 0.7921 in / 20.12 mm

Customer Insights

Chevrolet Bel Air owners have reported significant improvements in engine responsiveness after upgrading to these bearings. One owner noted, “After installing the ACL bearings, my 1965 Bel Air felt more lively, especially during high RPMs. The engine runs smoother, and I can feel the difference when I push it on the highway.”

For Corvette enthusiasts, the feedback is equally positive. A 1980 Corvette owner mentioned, “These bearings were a game changer for my build. They handle the power without any issues, and I’ve noticed better oil pressure across the board.”

With the ACL Race Series Engine Bearings, you're not just upgrading your engine; you're investing in reliability and performance that lasts. Make the smart choice for your classic Chevrolet and experience the difference on the road or track.