SBC 355 Short Block Engine - Ideal for Demolition Derbies and Budget Racers

Introduction to the SBC 355 Short Block

The sbc 355 short block refers to a powerful, specialized Chevrolet small block V8 engine used for demolition derbies and racing. With a displacement of 355 cubic inches (5.8 liters) and nicknamed the "355 shorty", this stout powerplant packs performance and durability into a compact package.

Background of the SBC 355 Short Block

The 355 short block starts with the venerable Chevy small block V8 design that first debuted in 1955. This engine architecture went on to become one of the most popular and modified engines in history. The sbc 355 builds on this legacy, maximizing cubic inches while remaining dimensionally compact.

This allows the sbc 355 shorty to fit nicely into stock engine bays, an important consideration for demolition derby vehicles and budget racers. The "short" designation refers to the engine's shorter-than-stock stroke crankshaft which reduces the overall height of the engine.

Key Specifications and Components

Here are some key specifications for the sbc 355 short block:

• Displacement: 355 cubic inches or 5.8 liters
• Bore x Stroke: 4.030 x 3.500 inches
• Horsepower Range: 400-650+ hp depending on build specs
• Compression Ratio: 9.5:1 to 12.5:1+
• Cylinder Heads: Cast iron or aluminum
• Intake Manifold: Single or dual plane
• Reliable high RPM capability

These stout short block engines feature heavy duty components including a forged steel crankshaft, forged pistons, and splayed 4-bolt main bearing caps. This makes them well suited to the demands of demolition derbies as well as drag racing and circle track applications.

Advantages of the SBC 355 Short Block

There are several key reasons the sbc 355 short block has become a popular choice:

Big Power in a Small Package

Although physically compact, the 355 cubes displace almost 6 liters and can generate tremendous horsepower and torque when built and tuned properly. The durable architecture ensures this small block stands up to serious power.

Physical Interchangeability

The sbc 355 shorty retains the same exterior engine dimensions, motor mounts, and attachments points as a standard Chevy 350 V8. This makes swapping the larger 355 engine into an existing vehicle straightforward.

Vast Aftermarket Support

Being based on the ubiquitous Chevy 350 means there is a nearly endless array of aftermarket parts and customization options for the sbc 355 including heads, intakes, carburetors, camshafts, headers, and more.

SBC 355 Short Block for Demolition Derbies

With demolition derbies experiencing a resurgence in popularity, purpose-built engines like the 355 short block really shine. The strength, durability and inexpensive build cost make them ideal for these rough-and-tumble events.

By starting with a stout splayed 4-bolt main short block, adding a flat top piston/rod assembly, oval port iron heads, a specialized hydraulic roller cam, and single plane intake, a derby-ready 355 shorty can reliably generate 500+ tire-smoking horsepower.

Surviving Derby Punishment

Between collisions with other vehicles, bouncing off walls, and the non-stop heavy throttle operation as drivers seek to be the last car moving, demolition derby puts incredible stresses on engines. The sbc 355 is designed specifically to withstand this absolute pounding.

The bottom end features a steel crank and rods to avoid expensive failures. Likewise the high volume oil pump keeps things properly lubricated to prevent overheating or oil starvation.

Economical Derby Power

You don't need expensive exotics metals or complex machining to produce stout, reliable horsepower from a 355 short block. Utilizing mainly cast iron engine components keeps costs down. This everyman approach matches nicely with grassroots derbies.

While a purpose-built sbc 355 shorty from the factory might cost $5000+, a capable DIY build can be assembled for half that cost. The plethora of affordable aftermarket parts makes hitting a specific power goal on a modest budget very feasible.

Conclusion

With an ideal blend of power, toughness, and affordability, it's no wonder the sbc 355 short block has become the engine of choice for demolition derby builders as well as budget racers. This proven performance engine platform has more than stood the test of time.