If your standard Bowtie block could handle 1500+ HP it would be Speedmaster's H1 engine block. Design from the ground up based upon your favourite bowtie block with the ability to handle naturally aspirated, supercharged, turbocharged and nitrous applications.
Brand: | Speedmaster |
Part Number: | 1-286-011-01 |
Part Type: | Engines, Bare Blocks |
Product Line: | H1 |
Cylinder Bore Diameter: | 4.125 in. |
Bore & Stroke: | 4.185 in. x 4.000 in. Max Recommended |
Cam Journal OD: | Standard SBC - 1.869 |
Cam Plug: | 2.375 in. Dia. Cup Plug |
Cylinder Wall Thickness: | 0.275 in. min @ 4.185 in. Bore |
Deck Height: | 9.025 in. |
Deck Thickness: | 0.675 in. Min |
Fuel Pump : | Standard Mechanical Provision |
Fuel Pump Pushrod: | Standard Length |
Freeze Plugs: | 10 x 1-5/8 in. Press In Cup Plugs |
Lifter Bores: | SBC 0.8427-0.8437 in. |
Main Bearing Size: | 2.650 in. (SBC 400) |
Main Bearing Bore: | 2.849 in. (SBC 400) |
Main Cap Bolts: | #1 7/16 in. (2) 3/8 in. (2) #2, 3, 4 7/16 (2) Splayed (2) #5 7/16 in. (2) 3/8 in. (2) |
Main Cap Press: | 0.005 in. |
Main Caps: | All 5 Billet Steel. 3 Center Caps Splayed |
Main Cap Register: | Deep Stepped Register (No Need for Dowels) |
Oil System: | Wet Sump - Main Priority Oiling (Can Use Dry Sump) |
Oil Pump Shaft: | 350 0.481 in. OD - Standard |
Oil Filter: | SBC, Uses 2 Bolt Adapter |
Oil Pan: | Standard SBC |
Rear Main Seal: | 400 Main FelPro# 2909 |
Serial No. Location: | Laft Front & Main Caps |
Starter: | Standard SBC |
Stud Holes, Head: | Blind Holes |
Timing Chain/Gears: | Standard SBC Components |
Timing Cover: | Standard Cam Location SBC |
Torque Specs: | 1 - 5 7/16 in. Bolts 65 ft. lbs. 1 & 5 3/8 in. Bolts - 35 ft. lbs. |
Weight: | 205 Lbs @ 4.0 in. Bore |
Quantity: | Sold individually. |
Notes: | Cam Bearings not Included, Replaces Dart 31182211 |
Calculator: | CFM Calculator |
The Speedmaster H1 is the perfect starting point for a powerful and reliable engine build suited for the street or race track. Precision pre-machining is the perfect starting point for a powerful and reliable engine eliminating time and expense of blueprinting a stock block or ''semi-finished'' factory casting. Best of all can be used with standard off the shelf small block components.
Speedmaster H1 Chevy SBC bare blocks feature:
Buy with Confidence! we have 10 in stock
Ships to the lower 48 STATES
WE HIGHLY RECOMMEND OUR CUSTOMERS TO READ THIS FOLLOWING TERMS BEFORE MAKING PURCHASE ON OUR EBAY SITE:
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