Atomic Barra Cast Block | PRE-PRODUCTION

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Atomic Barra Cast Block | PRE-PRODUCTION

Name: Atomic Barra Cast Block | PRE-PRODUCTION
Brand: Atomic Performance Products
SKU: 306421
Price: 15000.0 AUD
Availability: OutOfStock

$16,000.00 AUD

Sale Sold out

Tax included.

12mm

14mm

RTM Casting - Ready to machine (Bore + hone) Sold out

RTA Casting - Ready to Assemble Sold out

Custom RTM Casting - Minimum charge Sold out

Full water jackets | Wet Deck Sold out

Full water jackets | Dry Deck Sold out

Top fill cast | Dry Deck Sold out

Quantity must be 1 or more

FIRST ORDERS EST. LATE MARCH

Atomic H260 Cast Iron Barra Block

The Industry-First Aftermarket Barra Casting

Please note that as we finalise production the information will change and be updated.

The New Foundation

For decades, the limit of the Barra has been the block itself. While the factory casting is good, it has limits. 2000HP+ builds often face cylinder distortion, main cap walk, and thin bore walls that limit overbore potential.

💡 DID YOU KNOW?

This block uses "Murray's Magic Dust". Our proprietary H260 Base Iron blend offers an estimated +40% tensile strength increase over the OEM grey iron. Stronger material combined with a 50% increase in the min. cylinder wall thickness vs Factory, and added ribbing and support structures make for a far stronger and more stable block. Better ring seal, better bearing and main cap stability, better head gasket seal

The ATOMIC OPTION

The Atomic Cast Block is a direct OEM+ replacement that solves these issues. With a Siamese Bore design for rigidity, Stepped Cylinder Walls (min 5.5mm thickness), and a Thicker Deck, it is the ultimate foundation for everything from a reliable street car to a 2500HP+ drag weapon.

Siamese Bores. H260 Iron. 2500HP Capable.

Engineering Highlights

H260 "Magic" Iron

Special blend H260 base iron with proprietary additives. Offers +40% tensile strength vs OEM for extreme cylinder pressure containment, reduce twisting during launching and high torque scenarios.

Siamese Bores

Cylinders are connected (Siamese) rather than having a gap between them, massively increasing rigidity and allowing for consistent ring seal at high boost. 60% increase in bore thickness over factory with custom thicknesses available.

Revised Cooling

Features a revised pump impeller and cavity with added flow vane to assist with coolant flow at engine idle speeds and internal cooling ribs that support the bores and increase the cooling surface area. "Grout Filled" and "dry deck" style casting options available as well as custom requests.

Priority Oiling

Improved oil gallery size and routing with an additional turbo feed outlet on the exhaust side as well as feed and sensor ports on the intake side. Dual dipstick ready (front/rear sump). Revised oil filter boss for easy filter relocation.

High Rod Clearance

Bore skirts are pre-relieved for increased stroke and aluminium rods. Accepts all OEM brackets, heads, and accessories.

4140 Steel Billet Main Caps

Available in Standard Style or Atomic Wide-Style 4140 Billet Steel caps and M12 or M14 tool steel studs for zero cap walk.

Precision engineered for maximum rigidity.

Technical Specifications

Feature	Specification
Standard Bore Size	92.25mm (Suits Atomic Pistons) Other - specify at purchase
Min. Bore Rec. Bore Max. Bore	85.0mm (12.5mm bore thickness) 92.3mm (5.5mm bore thickness) 95.0mm (3.5mm bore thickness)
Min Wall Thickness	5.5mm @ Skirt Base (vs 3.5mm OEM) Custom thickness upon request
Deck Height	Standard OEM Height (Tall deck option TBC)
Deck Thickness	15mm
Pan Rail Thickness	22mm
Bare Weight	66kg (Factory = 63kg)
Main Stud Options	M12x1.5 (Standard) or M14x1.5 (Extreme)

Block Tiers & Power Ratings

Street / Performance

Rating: Guaranteed 1500HP
Cooling: Full Water Jackets with -16 ORB plugs
Use Case: High HP Street, Roll Racing, circuit/endurance

Pro Drag (Filled)

Rating: 2500HP+
Cooling: Part-Filled dry-deck down or solid casting
Use Case: Crazy Street, Roll Racing, Dedicated Drag Racing, Methanol