1286010 SPEEDMASTER Billet Iron Engine Block B-3 Chrysler

Review SPEEDMASTER Chrysler 5.7l Gen Billet Main Iron Engine Block for CHRYSLER HEMI B-3

The Speedmaster 1286010 Chrysler 5.7L Hemi Gen B engine block is a high-performance billet iron component designed for use in automotive applications. This engine block is specifically engineered for Chrysler's Gen B 5.7L Hemi engines, which were produced from 2007 to 2013 and are known for their power and durability.

The billet iron construction of this engine block ensures exceptional strength and rigidity. Billet iron is a material that is machined from a solid block of material, as opposed to being cast. This process allows for greater control over the final product, resulting in a block that is more uniform in its composition and less prone to defects.

The engine block features a 3.917-inch bore and a 9.239-inch stroke, which provides an impressive displacement of 345 cubic inches. This size and configuration is ideal for high-performance applications, as it offers a good balance between power and efficiency.

One of the key features of this engine block is its 5.7L Hemi design. This design is characterized by its shallow combustion chamber and hemispherical combustion bowl. This design allows for better air and fuel mixture, which results in more complete combustion and increased power output.

Another notable feature of this engine block is its DH-9.239 designation. This refers to the deck height, which is the distance from the top of the piston to the crankshaft centerline. A lower deck height allows for a shorter piston stroke, which can help to reduce engine weight and improve response.

This engine block is also compatible with the Chrysler Gen B 5.7L Hemi's factory engine management system, making it a straightforward upgrade for those looking to enhance the performance of their engine.

Overall, the Speedmaster 1286010 Chrysler 5.7L Hemi Gen B engine block is a high-quality, high-performance component that is ideal for those seeking to maximize the potential of their Chrysler Hemi engine. Its billet iron construction, Hemi design, and low deck height make it a durable and powerful addition to any automotive application.

The Chrysler 5.7L Hemi Gen B engine block, specifically the 1286010 billet iron variant with a 3.917 stroke length and 9.239 bore diameter, is a popular choice for high-performance automotive applications. Here are some potential pros and cons of purchasing this engine block:

1. Increased Durability: Billet iron engine blocks are known for their increased durability and strength compared to cast iron or aluminum blocks. This can be particularly beneficial in high-performance applications where increased power output and high RPM operation can place additional stress on the engine block.

2. Enhanced Thermal Conductivity: Billet iron engine blocks have better thermal conductivity than their cast iron counterparts. This can help to dissipate heat more efficiently, which can lead to better cooling performance and improved engine longevity.

3. Improved Engine Balance: The billet iron engine block is machined from a single piece of material, which can help to improve engine balance and reduce vibrations. This can lead to smoother engine operation and improved drivability.

4. Greater Flexibility: The billet iron engine block can be customized to meet specific performance requirements, such as bore size, stroke length, and deck height. This can be particularly beneficial for engine builders and racers who require a high level of engine customization.

1. Higher Cost: Billet iron engine blocks are typically more expensive than cast iron or aluminum blocks due to the additional manufacturing processes required to create them.

2. Increased Weight: Billet iron engine blocks are denser and heavier than cast iron or aluminum blocks, which can add weight to the engine and increase fuel consumption.

3. Complex Manufacturing Process: The manufacturing process for billet iron engine blocks is more complex and time-consuming than for cast iron or aluminum blocks. This can lead to longer lead times and higher costs.

The Chrysler 5.7L Hemi Gen B-3.917 DH-9.239 billet iron engine block offers several advantages for high-performance automotive applications, including increased durability, enhanced thermal conductivity, improved engine balance, and greater flexibility. However, these benefits come at a cost, both in terms of money and weight. Ultimately, the decision to purchase this engine block will depend on the specific requirements of the application and the priorities of the buyer.

For high-performance automotive applications where increased power output, durability, and reliability are priorities, the Chrysler 5.7L Hemi Gen B-3.917 DH-9.239 billet iron engine block can be a worthwhile investment. However, buyers should be prepared for the higher cost and increased weight associated with this engine block. Additionally, it may be beneficial to work with a reputable engine builder or performance specialist to ensure that the engine block is correctly installed and optimized for the specific application.

Details:

Designed to look standard under your bonnet, and work with stock components. Max recommended bore in.: 4.100 in. Specs brand: Speedmaster part number: 1-286-010 type: engines, bare block main journal oem engine style: stock / standard deck cylinder bore as shipped: 3.917 in. Max 0.040 oversize.

Max compression ratio: 15:1 engine block material: cast iron main bolt style: 2 caps included: yes cap billet steel fasteners bearings no rear seal 1-piece finished cylinder bores: raised cam location: freeze plugs quantity: sold individually notes: 2003 -2008 block, does not utilize VT.

specifications engineblocksam:

• for models: B-3, Hemi
• for makes: Chrysler
• brand: Speedmaster
• mpn: 1286010
• type: Engine Block
• manufacturer warranty: 1 Year
• material: Cast Iron

payments engineblocksam:

• other
• wallet: apple-pay
• credit card: visa

general engineblocksam:

• category: Auto Parts > Car Truck Accessories > Engines > Blocks

shipping engineblocksam:

• class: standard
• transit: 3-9 days
• service: fedex ground / fedex home delivery
• type: fixed
• carrier: fedex

offer engineblocksam:

• started: september 10, 2025
• in stock #: 4
• prices: $2219.58–$2838.16
• item condition: New
• options: ship-to-home
• availability: in stock
• sold #: 14

returns engineblocksam:

• paid by: seller
• time: 30 days
• policy: returns accepted

seller engineblocksam:

• rating: 98.9%
• city: rialto, california
• # reviews: 1258