Forged SB Chevy Rotating Assembly, 383 Flat Top, H-Beam, 5.7 Rods
383 Chevy Small Block V8, Forged Aluminum Piston Material, H-Beam Connecting Rod Type
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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.
Flat top, 476 g.
Features internally balanced 383 crankshaft - use balance option # 915-10200
C/R 58cc=12.0, 64cc=11.1, 76cc=9.8
Piston/Pin Weight: 609 g
Rod Length: 5.7"
- 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
Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 StrokePart # 91515550Qty x 1
Icon Chevy 383 Forged Pistons, Flat Top, 5.7 RodPart # 474728Qty x 1
Small Block Chevy 5.7 H-Beam Connecting Rods, 4340 Steel, 7/16Part # 91015328-5.7Qty x 1
King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, StdPart # 910807HP-STDQty x 1
King HP Series Chevy 350 Large Journal Engine Main Bearings-StandardPart # 910557HP-STDQty x 1
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Q & A
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.
Speedway Motors Product Manager Jeff K. talks about how to really make your engine bay stand out from the crowd with just a little patience, and some Speedway products.