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Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 Stroke

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Specs
Weight:
52.0
Sold in Quantity:
Each
Rod Journal Diameter:
2.10"
Rear Main Seal Style:
2-piece
Garage Sale:
No
Crankshaft Material:
Forged 4340 Steel
Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 Stroke
Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 Stroke

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Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 Stroke

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What's in the Box

As you make more and more power it becomes more important to use quality parts. These Scat 4340 forged steel cranks will help keep your motor alive.

  • For 2-piece rear main blocks
  • 2.100" rod pin
  • 52 lbs.
  • Straight shot & chamfered oil holes
  • Nitride hardened for superior wear reisistance
  • Lightening holes in all rod throws
  • Large radius on all journals
  • Heat treated, shot peened
  • Designed at SCAT
  • Engineered at SCAT
  • Inspected & micropolished at SCAT

Note: If you are going to run 915-15550 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. 

Item Details

3.75" stroke - 350 mains

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  • Engineered at SCAT
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Note: If you are going to run 915-15500 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. 

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  • Large radius on all journals
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  • 2.100" rod pin
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  • Nitride hardened for superior wear reisistance
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Beginning with properly placed counterweights that not only improve balance but reduce bearing loads, every aspect of these highly stressed components has been analyzed. The forgings are rough machined in a process that includes double stress relief operations that make these crankshafts very dimensionally stable.

Hardened with a deep nitride, Compstar cranks are ideal for all types of abusive racing environments. All rod journals are drilled and counterweights are profiled for piston clearance. With a consistent grind and polish, along with precise stroke and index, you will see why we say these crankshafts are Compstar Correct!

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Beginning with properly placed counterweights that not only improve balance but reduce bearing loads, every aspect of these highly stressed components has been analyzed. The forgings are rough machined in a process that includes double stress relief operations that make these crankshafts very dimensionally stable.

Hardened with a deep nitride, Compstar cranks are ideal for all types of abusive racing environments. All rod journals are drilled and counterweights are profiled for piston clearance. With a consistent grind and polish, along with precise stroke and index, you will see why we say these crankshafts are Compstar Correct!
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H-Series Features (Link)
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  • Use H-series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range.
  • H-Series bearings should be used if contact patterns obtained with P-series parts are too narrow. Contact pattern should ideally cover 2/3 to 3/4 of the bearing surface.
  • If you aren't sure which type of performance bearing to start with, the H-Series will be your best choice.

H-Series Features (Link)

Elgin EPL-4 Assembly Lube, 4 Oz.
                        

Eliminates galling, metal transfer and oil starvation during initial break-in. Adheres to metal surfaces, will not drain off. Apply to bearings, gears, crankshafts, cam lobes, valve stems, lifters and all mating parts with close tolerances.

For gas, alcohol and nitro engines.

Learn why using assembly lube is so important in our tech article, Installing New Hardware.