
Forged Small Block Chevy Rotating Assembly, 383 Dome, H-Beam, 5.7 Rods
350 Chevy Small Block V8, 383 Chevy Small Block V8, 350 mains Main Journal Style



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Details
Info
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.
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings.
Item Details
.163" dome, 526 g.
Features internally balanced 383 crankshaft - use balance option # 915-10200
C/R 58cc=14.1, 64cc=12.9, 76cc=11.0
Piston/Pin Weight: 658 g
Rod Length: 5.7"
Notes
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
- 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
What's In The Kit
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Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 StrokePart # 91515550Qty x 1
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Small Block Chevy 5.7 H-Beam Connecting Rods, 4340 Steel, 7/16Part # 91015328-5.7Qty x 1
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Icon Chevy 383 Forged Pistons, .163 Dome, 5.7 RodPart # 474737Qty x 1
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King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, StdPart # 910807HP-STDQty x 1
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King MB 557HP HP Series Chevy 350 Large Journal Main BearingsPart # 910557HP-STDQty x 1
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Reviews
Q & A
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Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century.
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Speedway Motors employee Pat joins us once again. This time Pat is talking to the Model A and Model T owners, specifically in regards to Moto-Meters and accessories.