Dayco PB81117SC Engine Harmonic Balancer

Dayco Supercharger Performance Balancer 8 Rib PB81117SC

The Dayco PB81117SC is a supercharger performance harmonic balancer built for select Chevrolet, Pontiac, and Cadillac applications. It combines a neutral balance design with dual integrated serpentine pulleys to support supercharged engine setups that require precise belt alignment and timing reference.

Key Features

• Part number PB81117SC from Dayco’s Supercharger Performance Balancer 8 Rib line
• Neutral balance design with no counterweight
• Steel outer ring for durability in performance engine use
• Two integrated serpentine pulleys: 4-groove and 8-groove
• Timing marks included for setup and service reference
• Crank bore measures 1.481 in. (37.60 mm)
• Nose outside diameter measures 2.126 in. (54.00 mm)
• Overall outside diameter measures 7.500 in. (190.50 mm)
• Overall width measures 3.097 in. (78.65 mm)
• Installation instructions included

Product Details

Dayco’s Supercharger Performance Balancer 8 Rib product line is built for applications that need a harmonic balancer with integrated pulley drive capability. The PB81117SC uses a steel outer ring, neutral counterweight balance, and timing marks to support accurate engine assembly and service. With dual serpentine pulley sections, this Dayco harmonic balancer is suited to supercharger-driven setups where belt routing and crankshaft interface dimensions matter.

Compatible With 2011-2017 Chevrolet Caprice, N/A; 2014-2017 Chevrolet SS, N/A; 1997-2013 Chevrolet Corvette, N/A; 2008-2009 Pontiac G8, N/A; and 2004-2007 Cadillac CTS, N/A. This part number, PB81117SC, is also a fitment-based search match for Chevrolet Corvette supercharger performance balancer applications and Chevrolet SS / Caprice performance engine builds.

Common Uses

• Correcting crankshaft pulley alignment in supercharged engine setups
• Replacing a worn or damaged harmonic balancer with timing marks
• Supporting belt drive operation with integrated serpentine pulley sections
• Addressing vibration control concerns tied to balancer wear or imbalance
• Restoring serviceability on performance-oriented Chevrolet, Pontiac, and Cadillac engines

Installation Notes

Verify crank bore, nose diameter, bolt hole quantity, and pulley configuration before installation. This balancer uses 9 bolt holes and does not include a crank trigger/exciter plate, hardware, or woodruff key. Installation instructions are included, and timing marks should be aligned according to the engine’s service procedure. Confirm clearance for the 7.500 in. overall diameter and 3.097 in. overall width during assembly.

Quality Assurance

Dayco manufactures this balancer as part of its performance-focused supercharger line, with a steel outer ring and neutral balance construction for consistent fitment and service use. The PB81117SC is built to match the listed vehicle applications and dimensional requirements.