Product Summary

350 mains Main Journal Style, 3.480" Engine Stroke

  • Crankshaft is specifically deigned for the two-piece rear main
  • Connecting rods have a full floating pin in silicon bronze bushing
  • Pistons features a T-5 heat treated aluminum construction
  • Main and rod bearing are 0.015" thick top layer for superior macro particle embeddability and conformability
  • Kit has a .150 dome piston which provides 11.5:1 compression with 64cc heads

Comes as a Kit

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Key Specs

MFG. Part #91510235
BrandSpeedway Motors
Connecting Rod TypeH-Beam
Piston StyleDome
Piston MaterialHypereutectic Aluminum
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Need To Know

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Speedway Motors 91510235 Details

Speedway introduces premium rotating assembly engine rebuild kits, with an optional balance job. Includes new 2-pc rear main seal cast steel crank, rods, pistons rod & main bearings. Cranks are new so they use standard size bearings.

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.

NOTE: Piston rings are not included and must be purchased separately.

Item Details

.150" dome, 630 g

C/R 58cc=12.5, 64cc=11.5, 76cc=10.0
Piston/Pin Weight: 485 g
Rod Length: 6.0", Ring Style: C     

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 4340 H-beam Connecting Rods w/ ARP bolts
    • Full floating pin in silicon bronze bushing
    • Precision bolt bushings to positively locate cap
    • 6 " lengths
    • 634 grams
    • Weight matched set of 8 rods
  • Keith Black Signature Series Hypereutectic Pistons
    • T-5 heat treated aluminum construction
    • Super stiff design for maximum ring seal
    • 4.000 " bore pistons available in .030, .040, or .060 sizes
    • 4.125 " bore pistons available in .030 or .040 sizes
  • King HP Series Main and 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

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 4340 H-beam Connecting Rods w/ ARP bolts
    • Full floating pin in silicon bronze bushing
    • Precision bolt bushings to positively locate cap
    • 6 " lengths
    • 634 grams
    • Weight matched set of 8 rods
  • Keith Black Signature Series Hypereutectic Pistons
    • T-5 heat treated aluminum construction
    • Super stiff design for maximum ring seal
    • 4.000 " bore pistons available in .030, .040, or .060 sizes
    • 4.125 " bore pistons available in .030 or .040 sizes
  • King HP Series Main and 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

Speedway Motors 91510235 Specifications

KEY SPECS
MFG. Part #91510235
BrandSpeedway Motors
Connecting Rod TypeH-Beam
Piston StyleDome
Piston MaterialHypereutectic Aluminum
GENERAL
Main Journal Style350 mains
Engine Stroke3.480"
Connecting Rod Length6.000"
Connecting Rod MaterialForged 4340 Steel
Connecting Rod Weight638 grams
Connecting Rod Bolt Diameter7/16"
Dome Height0.150"
Piston Weight485 grams
Piston Ring StyleC
Crankshaft MaterialCast Steel
Rear Main Seal Style2-piece
Wrist Pin Diameter.9272"
Wrist Pin Weight145 grams
Main Journal Diameter2.448"
Rod Journal Diameter2.10"
Bearing ConstructionBi-metal
Bearing UndersizeStandard
Narrowed BearingYes
Coated BearingNo
Sold in QuantityKit

Questions & Answers

2 Questions • 2 Answers

what would the compression ratios be? and can I use a small shot of nitous? thank you for your time.

by Kolton

• 9 years ago

1 answer

Shipped with balancer, and set of total seal gap less top rings $$ Total price shipped. 3741 White Blvd Naples Fl 34117 standard bore4.000 350 chevy

by Duger

• 10 years ago

1 answer

2 of 2 questions shown

Fitment

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  • 2-Piece Rear Main Chevy 350

  • Gen 1 L46 Small Block Chevy

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  • Gen 1 L65 Small Block Chevy

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  • Gen 1 L82 Small Block Chevy

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