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#91510250
Premium SB Chevy Rotating Assembly, 383 Flat Top, 5.7 In Rods
- Kit includes crankshaft, pistons, H-beam connecting rods wit ARP bolts, and main & rod bearings
- New high tech, fatigue resistant 80-60-06 cast steel crank with near forged endurance
- Forged 4340 Steel construction 5.7 inch rods
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$980.99
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$1,031.95
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Product Summary
350, 383, 350 mains Main Journal Style
- Kit includes crankshaft, pistons, H-beam connecting rods wit ARP bolts, and main & rod bearings
- New high tech, fatigue resistant 80-60-06 cast steel crank with near forged endurance
- Forged 4340 Steel construction 5.7 inch rods
- Rod bearings feature bi-metal aluminum silicon alloy with a fine micro-bore finish
- 390 Hypereutectic alloy flat top pistons
Comes as a Kit
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Key Specs
MFG. Part # | 91510250 |
Brand | Speedway Motors |
Connecting Rod Type | H-Beam |
Piston Style | Flat Top |
Piston Material | Hypereutectic Aluminum |
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Speedway Motors 91510250 Details
Speedway introduces premium rotating assembly engine rebuild kits, with an optional balance job. Includes new 2-pc rear main seal cast steel crank, rods, pistons rod & main bearings. Cranks are new so they use standard size bearings.
All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience! A kit purchased with the optional balance job will ship in 24-48 hours.
NOTE: Piston rings are not included and must be purchased separately.
Item Details
Flat top, 650 g
C/R 58cc=11.9, 64cc=10.9, 76cc=9.6
Piston/Pin Weight: 650 g
Rod Length: 5.7", Ring Style: A
Kits include:
- Speedway Cast Steel Crankshaft
- Two-piece rear main
- 80-60-06 cast steel construction
- Fatigue-resistant with near forged steel endurance
- Standard size journals
- Speedway 4340 H-beam Connecting Rods w/ ARP bolts
- Full floating pin in silicon bronze bushing
- Precision bolt bushings to positively locate cap
- 5.7 " lengths
- 622 grams
- Weight matched set of 8 rods
- Keith Black Signature Series Hypereutectic Pistons
- T-5 heat treated aluminum construction
- Super stiff design for maximum ring seal
- 4.000 " bore pistons available in .030, .040, or .060 sizes
- 4.125 " bore pistons available in .030 or .040 sizes
- King HP Series Main and Rod Bearings
- 0.015 " thick top layer for superior macro particle embedability and conformability
- 40 Vickers hardness to resist overlay migration and extrusion
- 450°F heat threshold for superior protection against friction and overheating
- Mains are 3/4 grooved for improved oiling to the rod journals
- Bi-metal aluminum silicon alloy featuring fine micro-bore finish
Kits include:
- Speedway Cast Steel Crankshaft
- Two-piece rear main
- 80-60-06 cast steel construction
- Fatigue-resistant with near forged steel endurance
- Standard size journals
- Speedway 4340 H-beam Connecting Rods w/ ARP bolts
- Full floating pin in silicon bronze bushing
- Precision bolt bushings to positively locate cap
- 5.7 " lengths
- 622 grams
- Weight matched set of 8 rods
- Keith Black Signature Series Hypereutectic Pistons
- T-5 heat treated aluminum construction
- Super stiff design for maximum ring seal
- 4.000 " bore pistons available in .030, .040, or .060 sizes
- 4.125 " bore pistons available in .030 or .040 sizes
- King HP Series Main and Rod Bearings
- 0.015 " thick top layer for superior macro particle embedability and conformability
- 40 Vickers hardness to resist overlay migration and extrusion
- 450°F heat threshold for superior protection against friction and overheating
- Mains are 3/4 grooved for improved oiling to the rod journals
- Bi-metal aluminum silicon alloy featuring fine micro-bore finish
Speedway Motors 91510250 Specifications
Speedway Motors 91510250 Specifications
KEY SPECS | |
---|---|
MFG. Part # | 91510250 |
Brand | Speedway Motors |
Connecting Rod Type | H-Beam |
Piston Style | Flat Top |
Piston Material | Hypereutectic Aluminum |
GENERAL | |
Main Journal Style | 350 mains |
Engine Stroke | 3.750" |
Connecting Rod Length | 5.700" |
Connecting Rod Material | Forged 4340 Steel |
Connecting Rod Weight | 622 grams |
Connecting Rod Bolt Diameter | 7/16" |
Piston Weight | 505 grams |
Piston Ring Style | A |
Crankshaft Material | Cast Steel |
Rear Main Seal Style | 2-piece |
Wrist Pin Diameter | .9272" |
Wrist Pin Weight | 145 grams |
Main Journal Diameter | 2.448" |
Rod Journal Diameter | 2.10" |
Bearing Construction | Bi-metal |
Bearing Undersize | Standard |
Narrowed Bearing | Yes |
Coated Bearing | No |
Notes | Torque rod bolts to 63 ft./lbs. |
Sold in Quantity | Kit |