MOROSO 64890 Groove Crankshaft Pulley

( Brand: Moroso ), ( Manufacturer Part Number: 64890 ), ( Type: Crank Pulley ), ( Universal Fitment: No ), ( Performance Part: Yes )

Review MOROSO Vintage Deep Groove Crankshaft Pulley Bbc

The Moroso 64890 Groove Crankshaft Pulley for BBC engines is a high-performance, engineered component designed to deliver optimal power transmission from the crankshaft to the accessory drive system. This pulley is an essential upgrade for any BBC (Big Block Chevrolet) engine builder seeking enhanced durability and improved performance.

Constructed from heavy-duty, ribbed cast aluminum, this pulley boasts increased rigidity compared to OEM alternatives. Ribs strategically placed around the pulley's perimeter not only provide additional strength but also help reduce vibration, ensuring a smoother engine operation. The ribbed design also aids in heat dissipation, keeping the pulley cooler during extended use.

This Moroso pulley features a groove design, which includes 12 grooves and 12 keyways. Each keyway is precision machined to accept Moroso's 12-rib serpentine belts (sold separately), providing a secure and reliable connection between the pulley and the belt. The groove design also ensures proper belt alignment, improving belt efficiency and reducing the risk of slippage or premature wear.

Additionally, the Moroso 64890 Groove Crankshaft Pulley is designed to accommodate a wide range of BBC engines, fitting both Gen I and Gen II engines with a 6.615-inch (168.0 mm) crankshaft flange bolt circle. This versatility makes it an excellent choice for engine builders working on various BBC projects or those looking to upgrade multiple engines.

In summary, the Moroso 64890 Groove Crankshaft Pulley is a robust and reliable upgrade for BBC engines. Its heavy-duty, ribbed cast aluminum construction provides increased strength and reduced vibration, while its groove design ensures proper belt alignment and improved belt efficiency. This pulley is an essential component for any BBC engine builder seeking improved performance and durability.

Moroso 64890 Groove Crankshaft Pulley for BBC Engines: Pros and Cons

The Moroso 64890 Groove Crankshaft Pulley is a popular aftermarket crankshaft pulley designed for BBC (Big Block Chevy) engines. This pulley offers several advantages and potential drawbacks. Let's examine both the pros and cons.

1. Enhanced Aesthetics: The Moroso 64890 Groove Crankshaft Pulley features a polished aluminum finish that not only improves the overall appearance of your engine but also helps in keeping the engine bay cooler by reflecting heat.

2. Lightweight: Since it's made of aluminum, this pulley is significantly lighter than the stock pulley, reducing rotating mass and improving engine response.

3. Upgraded Belt Drives: This pulley comes with upgraded belt drives that allow for a stiffer belt, leading to improved power transfer and less belt slippage.

4. Easy Installation: The pulley can be installed using the factory bolts and does not require any modifications to the engine or crankshaft.

5. Wide Compatibility: This pulley is compatible with a wide range of BBC engines, making it a versatile choice for various applications.

1. Cost: The Moroso 64890 Groove Crankshaft Pulley is priced higher than the stock pulley, which might be a deterrent for some budget-conscious enthusiasts.

2. Potential Noise: Some users have reported increased noise levels after installing this pulley, although this issue is not common and can be mitigated by properly aligning and tensioning the belt.

3. Potential Vibration: A few users have experienced increased vibration after installing this pulley. However, this can be minimized by using the recommended belt tension and ensuring proper installation.

The Moroso 64890 Groove Crankshaft Pulley is an excellent aftermarket upgrade for BBC engines. Its benefits, such as enhanced aesthetics, weight reduction, upgraded belt drives, and easy installation, make it a popular choice among enthusiasts. Although it comes with a higher price tag, it offers significant performance improvements. The potential drawbacks, such as increased noise and vibration, can be minimized with proper installation and belt tensioning.

If you are looking to enhance the performance and appearance of your BBC engine, the Moroso 64890 Groove Crankshaft Pulley is a worthwhile investment. Ensure that you follow the installation instructions carefully and use the recommended belt tension to minimize any potential issues.

Details:

The Moroso Vintage Deep Groove Crankshaft Pulley is a high-quality performance part specifically designed for Big Block Chevrolet engines. It features a deep groove design for improved performance and durability. The manufacturer part number is 64890, and it not universally fitting, ensuring a perfect fit for your vehicle. This has been sitting on a shelf for years it does show some oxidation and light surface rust but I m sure is still serviceable part.

A must for high revving engine.

part #: 64890 price

• $50.00

specifications pulleyhop:

• brand: Moroso
• mpn: 64890
• type: Crank Pulley
• universal fitment: No
• performance part: Yes

general pulleyhop:

• condition: New other see details
• Car Truck Parts Accessories > Accessory Belts > Pulleys

shipping pulleyhop:

• carrier: USPS
• service: USPS Ground Advantage
• transit: 5-11 Days
• class: Standard
• type: Calculated
• cost: $12.32

seller pulleyhop:

• rating: 100.0%
• # reviews: 999
• city: Old Bridge, New Jersey

payments pulleyhop:

• credit card: Mastercard
• wallet: Apple-pay
• other

returns pulleyhop:

• policy: No Returns

offer pulleyhop:

• availability: In Stock
• sold: 0
• started: June 7, 2026
• quantity: 1
• options: Ship-to-home

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