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#9151220
Forged SB Chevy Rotating Assembly, 350 Flat Top, H-Beam, 5.7 Rods
- Crankshaft features straight shot and chamfered oil holes
- There are lightening holes in all rod throws
- Pistons feature a 2618 aluminum alloy construction
$2,060.99
/kit
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Product Summary
350 mains Main Journal Style, 3.480" Engine Stroke
- Crankshaft features straight shot and chamfered oil holes
- There are lightening holes in all rod throws
- Pistons feature a 2618 aluminum alloy construction
- Connecting rods have full floating pin in silicon bronze bushings
- Main and rod bearings feature 40 Vickers hardness to resist overlay migration and extrusion
Comes as a Kit
View Kit Components
Key Specs
| MFG. Part # | 9151220 |
| Brand | Speedway Motors |
| Connecting Rod Type | H-Beam |
| Piston Style | Flat Top |
| Piston Material | Forged Aluminum |
Need To Know
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Return PolicySpeedway Motors 9151220 Details
Speedway Motors 9151220 Details
Speedway introduces forged rotating assemblies, with an optional balance job. Includes new 2-pc rear main seal crank, rods and pistons. Cranks are new so they use standard size bearings. All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs.
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. These rotating assembly engine rebuild kits may require additional charges for heavy metal.
If you are going to run this crank in a sprint car motor, you must have the crank flange turned down prior to balancing the crank to allow it to go through the motor plate.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings.
Kits feature:
- Scat 4340 Forged Steel Crankshaft
- Standard size journals
- Straight shot and chamfered oil holes
- Nitride hardened and shot peened
- Lightening holes in all rod throws
- Large radius on all journals
- KB Signature Series Forged Pistons
- 2618 aluminum alloy construction
- T-6 heat treated
- 4.000" bore pistons available in standard, .030, .040, or .060 sizes
- 4.125" bore pistons available in .030 or .040 sizes
- C/R 58cc=11.2, 64cc=10.4, 76cc=9.1
Piston/Pin Weight: 634 g
Rod Length: 5.7"
- Speedway 4340 H-beam Connecting Rods
- 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
- King HP Series Main & 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
- Chevy 350: 4.000" bore x 3.48" stroke
Item Details
Flat top, 500 g.
Speedway Motors 9151220 Specifications
Speedway Motors 9151220 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 9151220 |
| Brand | Speedway Motors |
| Connecting Rod Type | H-Beam |
| Piston Style | Flat Top |
| Piston Material | Forged Aluminum |
| GENERAL | |
| Main Journal Style | 350 mains |
| Engine Stroke | 3.480" |
| Connecting Rod Length | 5.700" |
| Connecting Rod Material | Forged 4340 Steel |
| Connecting Rod Weight | 622 grams |
| Connecting Rod Bolt Diameter | 7/16" |
| Piston Weight | 499 grams |
| Piston Ring Style | C |
| Crankshaft Material | Forged 4340 Steel |
| Rear Main Seal Style | 2-piece |
| Wrist Pin Diameter | .9272" |
| Wrist Pin Weight | 135 grams |
| Main Journal Diameter | 2.448" |
| Rod Journal Diameter | 2.10" |
| Bearing Construction | Bi-metal |
| Bearing Undersize | Standard |
| Narrowed Bearing | Yes |
| Coated Bearing | No |
| Sold in Quantity | Kit |
Ratings & Reviews
5
2 Reviews
Customers appreciated the rotating kit's high quality and practicality. The kit fits well with a .030 over 350 SBC, 64cc heads, and a decked .010 block. Furthermore, measurements for main clearance, rods, pistons, rings, and rod side clearance are within factory specifications, ensuring usability and safety. The forged steel crank assembly is anticipated to enhance engine performance by increasing its speed and smoothness, thus providing more horsepower. The customers would sincerely recommend this kit over others for its superior features and robust construction.
Ratings & Reviews
5
2 Reviews
Customers appreciated the rotating kit's high quality and practicality. The kit fits well with a .030 over 350 SBC, 64cc heads, and a decked .010 block. Furthermore, measurements for main clearance, rods, pistons, rings, and rod side clearance are within factory specifications, ensuring usability and safety. The forged steel crank assembly is anticipated to enhance engine performance by increasing its speed and smoothness, thus providing more horsepower. The customers would sincerely recommend this kit over others for its superior features and robust construction.
5
2 reviews
5
2
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Yes, I would buy this rotating kit again. Good stuff.
5.0
5 years ago
Larry
Grass Valley, Ca.
Verified
This was in a .030 over 350 SBC, 64cc heads, block was decked .010. Main clearance was .0025, rods was .0015. Pistons at.005. Rings, top and second were .022 . Pistons .005. Rod side clearance was .010 to .012. Hope that is'nt to tight. With in factory specs, .008 to .013. Will fire engine soon.
Would Recommend
Performance
5.0
7 years ago
Turtle
Holmesville, Nebraska
Verified
Hopefully this spring when I take it into the machine shop to have it put together, the forged steel crank assembly will let the motor turn over faster & more smoothly, providing more horsepower!
Would Recommend
Showing 2 of 2 reviews
Questions & Answers
Questions & Answers
5 Questions • 5 Answers
Can the pistons in this kit be traded out for a more Turbo compatible piston? You do say that rings of choice can be ordered.
by Shane
• 2 years ago
1 answer
View Answer
Is the kit balance
by RAQUEL
• 8 years ago
1 answer
View Answer
What compression would these pistons have in a 64cc head?
by Logan Baker
• 9 years ago
1 answer
View Answer
do rist pins come with kit
by dube
• 10 years ago
1 answer
View Answer
what is the ring thickness top&2ND
by
• 15 years ago
1 answer
View Answer
5 of 5 questions shown
Fitment
Fitment
1973-1975 Chevy Bel Air
Gen 1 L48 Small Block Chevy
1972 Chevy Blazer
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1973-1974 Chevy Blazer
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1973-1982 Chevy C10
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1983 Chevy C10
2-Piece Rear Main Chevy 350
1984 Chevy C10
Gen 1 L48 Small Block Chevy
1985 Chevy C10
2-Piece Rear Main Chevy 350
1972-1982 Chevy C10 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1983 Chevy C10 Suburban
2-Piece Rear Main Chevy 350
1984 Chevy C10 Suburban
Gen 1 L48 Small Block Chevy
1985 Chevy C10 Suburban
2-Piece Rear Main Chevy 350
1982-1987 Chevy C15
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972-1982 Chevy C20
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1984 Chevy C20
Gen 1 L48 Small Block Chevy
1972-1982 Chevy C20 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1984 Chevy C20 Suburban
Gen 1 L82 Small Block Chevy
1972-1982 Chevy C30
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1984 Chevy C30
Gen 1 L46 Small Block Chevy
1983-1987 Chevy C35
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1973-1982 Chevy Camaro
Gen 1 L48 Small Block Chevy
1973-1982 Chevy Caprice
Gen 1 L48 Small Block Chevy
1983 Chevy Caprice
2-Piece Rear Main Chevy 350
1984 Chevy Caprice
Gen 1 L48 Small Block Chevy
1985 Chevy Caprice
2-Piece Rear Main Chevy 350
1973 Chevy Chevelle
Gen 1 L48 Small Block Chevy
1973-1974 Chevy Corvette
Gen 1 L48 Small Block Chevy
1980 Chevy Corvette
Gen 1 L48 Small Block Chevy
1984 Chevy Corvette
Gen 1 L83 Small Block Chevy
1985 Chevy Corvette
2-Piece Rear Main Chevy 350
1973-1977 Chevy El Camino
Gen 1 L48 Small Block Chevy
1978-1979 Chevy El Camino
2-Piece Rear Main Chevy 350
1983 Chevy El Camino
2-Piece Rear Main Chevy 350
1984 Chevy El Camino
Gen 1 L81 Small Block Chevy
1975-1982 Chevy G10
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1984 Chevy G10
Gen 1 L82 Small Block Chevy
1970 Chevy G10 Van
2-Piece Rear Main Chevy 350
1972-1974 Chevy G10 Van
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1975-1982 Chevy G20
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972 Chevy G20 Van
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1973-1974 Chevy G20 Van
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L82 Small Block Chevy
1975-1982 Chevy G30
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1970 Chevy G30 Van
2-Piece Rear Main Chevy 350
1972-1974 Chevy G30 Van
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1973-1982 Chevy Impala
Gen 1 L48 Small Block Chevy
1983 Chevy Impala
2-Piece Rear Main Chevy 350
1985 Chevy Impala
2-Piece Rear Main Chevy 350
1972-1982 Chevy K10
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972-1982 Chevy K10 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972-1982 Chevy K20
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972-1982 Chevy K20 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1972-1974 Chevy K30
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1977-1982 Chevy K30
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1970-1974 Chevy K5 Blazer
2-Piece Rear Main Chevy 350
1975-1982 Chevy K5 Blazer
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1983 Chevy K5 Blazer
2-Piece Rear Main Chevy 350
1984 Chevy K5 Blazer
Gen 1 L48 Small Block Chevy
1985 Chevy K5 Blazer
2-Piece Rear Main Chevy 350
1973-1975 Chevy Laguna
Gen 1 L48 Small Block Chevy
1976 Chevy Laguna
2-Piece Rear Main Chevy 350
1973-1982 Chevy Malibu
Gen 1 L48 Small Block Chevy
1970-1971 Chevy Monte Carlo
2-Piece Rear Main Chevy 350
1973-1975 Chevy Monte Carlo
2-Piece Rear Main Chevy 350
1976-1977 Chevy Monte Carlo
Gen 1 L48 Small Block Chevy
1982-1983 Chevy Monte Carlo
2-Piece Rear Main Chevy 350
1975 Chevy Monza
Gen 1 L48 Small Block Chevy
1973-1974 Chevy Nova
Gen 1 L48 Small Block Chevy
1975 Chevy Nova
2-Piece Rear Main Chevy 350
1976-1979 Chevy Nova
Gen 1 L48 Small Block Chevy
1975-1979 Chevy P30
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1980-1983 Chevy P30
2-Piece Rear Main Chevy 350
1985 Chevy P30
2-Piece Rear Main Chevy 350
1970 Chevy P30 Van
2-Piece Rear Main Chevy 350
1972 Chevy P30 Van
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1973-1974 Chevy P30 Van
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
1967 GMC C15/C1500 Suburban
2-Piece Rear Main Chevy 350
1980-1984 GMC C1500
2-Piece Rear Main Chevy 350
1980-1986 GMC C1500 Suburban
2-Piece Rear Main Chevy 350
1967-1972 GMC C25/C2500 Pickup
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1972 GMC C25/C2500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC C35/C3500 Pickup
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1978-1987 GMC Caballero
2-Piece Rear Main Chevy 350
1975-1978 GMC G15
2-Piece Rear Main Chevy 350
1967-1974 GMC G15/G1500 Van
2-Piece Rear Main Chevy 350
1979-1986 GMC G1500
2-Piece Rear Main Chevy 350
1975-1978 GMC G25
2-Piece Rear Main Chevy 350
1967-1974 GMC G25/G2500 Van
2-Piece Rear Main Chevy 350
1979-1986 GMC G2500
2-Piece Rear Main Chevy 350
1975-1978 GMC G35
2-Piece Rear Main Chevy 350
1967 GMC G35/G3500 Van
2-Piece Rear Main Chevy 350
1970-1974 GMC G35/G3500 Van
2-Piece Rear Main Chevy 350
1979-1986 GMC G3500
2-Piece Rear Main Chevy 350
1974-1977 GMC Jimmy
2-Piece Rear Main Chevy 350
1983-1984 GMC Jimmy
2-Piece Rear Main Chevy 350
1975-1978 GMC K15
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1975-1978 GMC K15 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC K15/K1500 Pickup
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC K15/K1500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1979-1984 GMC K1500
2-Piece Rear Main Chevy 350
1979-1980 GMC K1500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1975-1978 GMC K25
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1975-1978 GMC K25 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC K25/K2500 Pickup
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC K25/K2500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1979-1984 GMC K2500
2-Piece Rear Main Chevy 350
1979-1986 GMC K2500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1994-1999 GMC K2500 Suburban
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1967-1974 GMC K35/K3500 Pickup
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
1973-1977 GMC Sprint
Gen 1 LM1 Small Block Chevy
1967 GMC Suburban
Gen 1 L46 Small Block Chevy
1987-1991 GMC V1500 Suburban
350 Chevy Small Block V8
1987 GMC V2500
350 Chevy Small Block V8
1987-1991 GMC V2500 Suburban
350 Chevy Small Block V8
1987-1991 GMC V3500
350 Chevy Small Block V8