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Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore

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Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore
Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore

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Watch the videos below to get an inside look at the development and production of Dart's SHP engine blocks.



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What's in the Box

Dart's Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts. The SHP block as all the features needed without spending the big bucks and having to wait on your machine shop.

  • All new, precision machined
  • Cast from high nickel iron
  • Priority main oiling system
  • Siamese 4.000" bores
  • At 4.165" bore, .230" wall thickness
  • Clearance for 3.75" stroke w/ steel rods
  • Decks parallel within .002"
  • Made in USA
  • Blind head bolt holes
  • 350 main journals
  • Splayed 4-bolt center main caps
  • Two piece rear main seal
  • Accepts OEM roller rockers and cams
  • Uses 1981-85 oil pans & dipsticks
  • Accepts standard starters and bellhousings

Dart SHP Block Instructions (PDF)

Notes

  1. DOES NOT come with cam bearings. Order (5) qty. 304-3221 bearings.
  2. Cylinders will require final bore machining before assembly.

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                        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.

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
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    • 5.7" lengths
    • 622 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
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  • 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
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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.

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

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
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    • 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
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  • Chevy 350: 4.000" bore x 3.48" stroke
Dart 31161211 Special High Performance Chevy Block, 4.125 Inch Bore
(Part #30431612)
                        

Dart's Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts. The SHP block as all the features needed without spending the big bucks and having to wait on your machine shop.

  • All new, precision machined
  • Cast from high nickel iron
  • Priority main oiling system
  • Siamese 4.125" bores
  • At 4.165" bore, .230" wall thickness
  • Clearance for 3.75" stroke w/ steel rods
  • Decks parallel within .002"
  • Made in USA
  • Blind head bolt holes
  • 350 main journals
  • Splayed 4-bolt center main caps
  • Two piece rear main seal
  • Accepts OEM roller rockers and cams
  • Uses 1981-85 oil pans & dipsticks
  • Accepts standard starters and bellhousings

Dart SHP Block Instructions (PDF)

Manley 190310 Forged Lightweight Small Block Chevy Crankshaft
(Part #505190310)
                        

This forged crankshaft from Manley Performance is great for IMCA RaceSaver and other classes that require a 48-50 pound crankshaft. The 4320 non-twist forging design allows for internal balance.  For Small Block Chevy applications.

Includes:

  • 2 piece rear main seal
  • OEM "appearing"
  • Not drilled on second/third rod throws
  • No knife edge or undercut
  • 48 - 50 lbs total weight 

Specs:

  • 3.480" stroke
  • 5.700" min rod length
  • 2.450" main journal diameter
  • 2.100" rod journal
  • 1800 gram bob weight
Dart DT-1T Cam Bearings for Little M Chevy Block, Set/5
(Part #3043220)
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Kit Includes:

  • (4) Head Dowels
  • (2) Timing Cover Dowles
  • (3) Cam Bolts
  • (1) Cam Lock Plate
  • (2) Oil Filter Adaptor Bolts
  • (1) Long Woodruff Key
  • (2) Short Woodruff Keys
  • (2) Transmission Dowels