Chevy SBC 350 B-4.000 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block
Overview
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.
Specs
| Brand: | Speedmaster |
| Part Number: | 1-286-001-01 |
| Part Type: | Engines, Bare Block |
| Cylinder Bore Diameter: | 4.000 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: | 2.450 in. (SBC 350) |
| Main Bearing Bore: | 2.649 in. (SBC 350) |
| 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 350 SBC |
| Rear Main Seal: | Standard 350 SBC |
| 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 31181111 |
Description
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:
- Cast from premium high-strength Class 32B iron
- Standard deck height allows the use of off the shelf parts
- Uses standard small block Camshaft, Timing Chain, Oil pump, Oil filter, Motor Mounts.
- Priority main oiling system directs oil to main bearings
- Blind tapped head bolt holes prevent water leaks
- Extra thick decks ensure reliable head gasket seal
- Billet steel 4-bolt main caps (splayed for extra strength)
- Front and rear external oil feed, crossover and restrictor provision
- Simplified plumbing for external pumps
- Used in 1500+HP Applications
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Ratings & Reviews
1 Review
Holds big power
Gary| 11/27/2023 4:34 pm
I got one of these bad boys 2 years ago black Friday it's an amazing strong block for a big power application. Absolutely love mine.