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Forged SB Chevy Rotating Assembly, 383 Dome, H-Beam, 6 In Rods

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Specs
Sold in Quantity:
Each
Main Journal Style:
350 mains
Rod Journal Diameter:
2.10"
Rear Main Seal Style:
2-piece
Piston Ring Style:
C
Connecting Rod Length:
6.000"
Piston Style:
Dome
Piston Material:
Forged Aluminum
Main Journal Diameter:
2.448"
Bearing Undersize:
Standard
Bearing Construction:
Bi-metal
Crankshaft Material:
Forged 4340 Steel
Connecting Rod Type:
H-Beam
Connecting Rod Material:
Forged 4340 Steel
Connecting Rod Bolt Diameter:
7/16"
Narrowed Bearing:
Yes
Coated Bearing:
No
Stroke:
3.75
Wrist Pin Diameter:
.9272
Dome Height:
.163
Piston Weight:
441
Wrist Pin Weight:
132
Connecting Rod Weight:
638
Notes
Torque rod bolts to 63 ft./lbs.
Forged SB Chevy Rotating Assembly, 383 Dome, H-Beam, 6 In Rods

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (0)

Q & A (2)

What's in the Box

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, 441 g.
Features internally balanced 383 crankshaft - use balance option # 915-10200

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
    • 6.0" lengths
    • 634 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

Customer Reviews

This product has no reviews.

Product Q&A

2 questions : 2 answers

1 answers

What is the max safe rpm this kit could handle?

Owen
November 30, 2014

What is the max safe rpm this kit could handle?

Answers

December 01, 2014
EricM
This kit does not have an advertised RPM rating. The reason is because the type of use the engine is subject to will be a large factor in the maximum RPM that a rotating assembly can withstand. A short duration burst such as drag racing will allow a higher max RPM than an endurance application such as circle track racing, road racing, off road, etc. In very general terms this kit should be able to withstand 8000 RPM. Again, that number could be drastically lower or higher depending upon the intended usage.
1 answers

whats compression ratio svc with 64cc head with dome piston

jatt
oh
February 09, 2016

whats compression ratio svc with 64cc head with dome piston

Answers

February 10, 2016
Zach
Expert
You would be right around 12.9:1 with a 64cc head
Page 1 of 1

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