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Chevrolet Performance 502ci BB Engine, Bare

Chevrolet Performance 19170540


jegs shipping
Estimated to ship on 08/01/18
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Truck Freight: $119.00
Chevrolet Performance 502ci BB Engine, Bare $1,951.93
502 Bare Block
  • 9.800 Deck Height
  • 1-Piece Rear Main Seal
  • 4-bolt Main Cast Iron Caps
  • Max Stroke 4.250

  • Chevrolet Performance 19170540 Details

    Performance Big Block Bare Block

    A Better Big-Block

    The classic Chevy Big-Block production engine was introduced in 1965. In the late 1980s, a new version arrived, designed for marine and fuel-injected applications. The early-style engines are known as Mark IV Big-Blocks, while the later style is referred to as the Gen V (and Gen VI) Big-Block. You can tell them at a glance by checking for a mechanical fuel pump mounting pad. If it has one, it's a Mark IV. If there's no fuel pump pad, it's a Gen V block.

    Despite the fuel pump mounting pad difference in their castings, the cylinder blocks of the Mark IV and Gen V are based on the same design architecture. There are several other differences?particularly in the water jackets near the deck surfaces?that make some Mark IV and Gen V parts incompatible, including crucial components such as the cylinder head gaskets.

    Within the last few years, Chevrolet Performance revised the basic Big-Block architecture to commonize the Mark IV and Gen V, creating an all-new cylinder block casting that combines the features of both generations. It also incorporates significant updates and strength-enhancing features that make the Big-Block a stronger engine foundation with provisions to support 21st-century performance.

    Although the basic Big-Block architecture is revised, Chevrolet Performance continues to offer two versions, each differentiated by performance and displacement capability. The Bowtie block continues to be the block of maximum performance. All of our crate engines use the revised Big-Block design.

    Here's what distinguishes the latest Chevrolet Performance Big-Blocks from earlier castings:
  • Water jackets are revised near the deck surfaces so that Mark IV or Gen V head gaskets can be used interchangeably
  • Oil pressure feed holes are added to the oil filter boss and front bulk head to support oil feeds for superchargers, turbochargers, etc.
  • The oil hole next to the camshaft bore at the front of the block is repositioned to enable safe machining of the cam bore to accept a 50mm roller camshaft bearing
  • A mechanical fuel pump mounting pad is included, similar to the Mark IV
  • A boss next to the distributor hole in the valley supports hardware for digital ignition equipment
  • The front bulkhead is thicker and stronger, with marked provisions for a 10-bolt timing cover (non-Bowtie blocks are delivered with drilled and tapped holes for 6-bolt covers; remaining holes must be drilled and tapped at the prescribed positions)
  • Non-Bowtie blocks are machined for 4-bolt parallel main caps; Bowtie blocks are machined for 4-bolt splayed caps
  • Revised rear-of-block allowed for the machining of 1- or 2-piece main seals (similar to Gen V design)
  • A front clutch boss is included for older muscle car applications
  • 454 blocks have a slightly beefier main web than previous blocks
  • All blocks are made with the standard production roller camshaft and lifter machining
  • 502 and Bowtie blocks share the same main web, which is strengthened considerably from the Mark IV and the first-generation Gen V Bowtie block
  • Bowtie blocks feature a distinctive water jacket design to allow up to 4.600'' bores. These blocks can be identified by a ''B'' suffix behind the casting number.
  • Two additional core plugs are featured in the rear bulkhead. They enhance the manufacturing process at the foundry and help improve overall quality. Also, a ''Bowtie'' logo and other identifying marks are incorporated on the Bowtie block, distinguishing it from previous generations.

  • Specifications:

    Cam Bearings Included
    Cylinder Bore as Shipped (in.)
    Cylinder Bore Diameter (in.)
    Deck Height (in.)
    Engine Block Material
    Cast iron
    Engine Block Style
    Engine Block Weight (lbs.)
    Finished Cylinder Bores
    Freeze Plugs Included
    Main Bearings Included
    Main Bolt Style
    Main Cap Fasteners Included
    Main Cap Material
    Cast iron
    Main Caps Included
    Main Journal Type
    454 mains
    Sold individually
    Raised Cam Location
    Rear Main Seal Style
    Manufacturer's Part Number:

    Chevrolet Performance bare blocks are the right choice for street car rebuilds or to start your own mild engine project. They come in the same dimensions that you are already familiar with and are produced to the high level of quality that Chevrolet is famous for. These are brand new castings that are machined to exact tolerances and delivered to you at an affordable price. These blocks are designed for street engines that demand good strength and a high level of durability! Available for all popular GM vehicle lineups.

    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations