4.500 Bore Spacing Aluminum Small Block BRODIX® Blocks

The only way to describe BRODIX 8B 1200 4.500 bore spacing block is big and efficient. The standard bore size of this block is 4.180, but it may be bored to 4.250. The larger bore size increases the efficiency of this block with 500 cubic inch engines. Some of the features available include roller cam bearings (50-55 mm), .391 raised cam, 350 or 400 mains, and your choice of .843-.937 lifter bore housings. The maximum deck height of 9.625 will allow the engine builder plenty of room for a larger stroke and rod combination. BRODIX has definitely taken the small block market to the next step with this aluminum block.

 

Block Part Numbers

Block Specifications

8B 1200 C: 400 Main / 400 Bore / Raised Cam /
Standard Bell Housing
8B 1200 D: 400 Main / 400 Bore / Raised Cam /
Open Bell Housing
8B 1250 C: 350 Main / 400 Bore / Raised Cam /
Standard Bell Housing
8B 1250 D: 350 Main / 400 Bore / Raised Cam /
Open Bell Housing
• Made in the USA
• Proprietary A-356 Virgin Aluminum
• 4.500 Bore Spacing
• 350 or 400 Main
• Machined for Roller Cam Bearings
(50 mm or 55 mm)
• Strongest Main Webbing in the Business
• Raised Cam Location (.391) With Wide Pan Rail
• Choose From Wet or Dry Sump
• Available With or Without a Fuel Pump Boss
• Available With Two Bell Housing Styles:
Drag Race or Late Model
• Head Studs Are Available From BRODIX
• Plug Kit is Provided With the Block
• Thick Wall Sleeves Allow Bore Sizes up to 4.250
• Available With .843, .875, .903, or .937 Lifter Bore Sizes
• Best Block in the Industry

Cam Bearings

Main Caps

• Cam Bearings Are Sold Separately
• 50 mm Roller Bearings∆
• 55 mm Roller Bearings∆
∆ Roller cam bearings use spiral locks on all cam bearings.

• 350 or 400 Mains
• Standard Light Steel
• Rear Main Seal: 350 – FP 2900, 400 – FP 2909

Stroke Clearance

Torque Specs

• 4.375 Standard
• 4.500 (With Additional Machining)

• Outside Main: 65 ft-lb
• Inside Main: 75 ft-lb
• Front and Rear Main: 30 ft-lb, 3/8 12 pt All torque specs are based on use of light motor oil

Cam Locations

WARNING

• .391 Raised Cam Location Only

THE SLEEVES ARE LEFT ABOVE THE DECK OF THE BLOCK INTENTIONALLY. IT IS THE ENGINE BUILDER’S PREFERENCE WHETHER OR NOT TO SURFACE THE SLEEVES FLAT WITH THE DECK OF THE BLOCK.

Deck Height

• 9.000 – 9.625

Small Block Machining Options

Part #

SS Special Deck Height
SS Align Hone
SS Finish Hone Bore (ES 405)
SS BLK Mach .875 Lifter Bores
SS BLK Mach .903 Lifter Bores
MS Solid Block

Description

Machine Special Deck Heights
Finish Hone of Crankshaft Mains
Finish Hone of Cylinder Bore (Call for Details)
Machine Small Block BRODIX Block for .875 Lifter Bores
Machine Small Block BRODIX Block for .903 Lifter Bores
Solid Block – No Water

Small Block Head Stud Kits

Part #

SK HS 13 4500
SK HSBD 4500

Description

BRODIX Aluminum Block Head Stud Kit for BRODIX 13° 4.500 Bore Space Head
BRODIX Aluminum Block Head Stud Kit for BRODIX Symmetrical Port 4.500 Bore Space Head

Small Block Cam Bearings

Part #

8B Cam Bearings – Roller Cam 50
8B Cam Bearings – Roller Cam 55

Description

Cam Bearing Set for 50 mm Roller Cam
Cam Bearing Set for 55 mm Roller Cam