Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Cylinder Block Components

Shop Open Wheel Engine At Speedway Motors

Speedway Motors is the open wheel racing engine authority! Whether you have a 360, 410, USAC or Outlaw series Chevy race engine, Speedway has every part Sprint and Midget racers need. Our large assortment of cylinder heads, camshafts and racing valve train components allows you to tailor your engine for any racing condition. Speedway also has a variety of durable forged rotating assemblies, dry sump oiling systems and Dart engine blocks that can survive the rigors of open wheel racing. Race and win with Speedway Motors!

Featured Products
  • Dart 31354275 Iron Eagle Ford Sportsman 302 Engine Block, 4.125 Inch Bore
    Dart 31354275 Iron Eagle Ford Sportsman 302 Engine Block, 4.125 Inch Bore
    (Part #30454275)
    x
                

    Iron Eagle Sportsman block for Ford small block engines are engineered to work with stock components. They are powerful, competition blocks that give racers the features they need, while still being affordable!

    Features:

    • Siamesed cylinders: Standard 4.125" cylinders can be safely bored to 4.185" diameter.
    • Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to prevent detonation, extend engine life and produce consistent cylinder temperatures.
    • Ductile iron front and rear 2 bolt main caps with 4 bolt interior main caps. Rear cap uses standard one piece seal.
    • Main bearing diameters 302 (2.249") 
    • Stock components make Dart blocks a direct replacement for most production small blocks. Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans and pumps.
    • Upgraded low restriction priority main oiling system.
    • Reinforced head bolt bosses are blind tapped to prevent leaks and produce accurate torque readings. Extra thick decks prevent head gasket leaks.
    • Standard camshaft and camshaft drive can be used. Lifter valley has bosses for production hydraulic roller lifters.

    Iron Eagle Sportsman Ford 302 Block Guide (PDF)

     

     

  • Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    (Part #91090010)
    x
                

    This is a SFI certified 6" internally balanced Small Block Chevy harmonic balancer. It has 60 timing marks plus engraved marks every 90 degrees.

    • 18.1 SFI Rating
    • Steel
    • Painted
    • Sold Individually 

     

  • 1969-Up Chevy 350 Narrowed Main Bearings
    1969-Up Chevy 350 Narrowed Main Bearings
    (Part #91615350)
    x
                We start with a Clevite 77 # MS909P-STD standard size main bearing and clearance chamfer cut it to fit large fillet radius cranks. Fits 1969-Up small block Chevy 350 c.i. crankshafts.
            
  • Dart 31161211 Special High Performance Chevy Block, 4.125 Inch Bore
    Dart 31161211 Special High Performance Chevy Block, 4.125 Inch Bore
    (Part #30431612)
    x
                

    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)

  • Dyer's I Series Connecting Rods, Large Journal Small Block Chevy
    Dyer's I Series Connecting Rods, Large Journal Small Block Chevy
    (Part #91015243)
    x
                

    These connecting rods are offered in 5.7, 5.850, and 6.00 inch options. They are made of forged 4340 steel and are fully heat treated.

    • For Small Block Chevy Applications
    • Heat Treated
    • Double Banded Cap with I-Beam Design
    • 4340 Forged Steel
    • Choose your desired length
  • ARP Fasteners 134-6003 Connecting Rod Bolt Set, Chevy 350, 3/8 Inch
    ARP Fasteners 134-6003 Connecting Rod Bolt Set, Chevy 350, 3/8 Inch
    (Part #101AR304)
    x
                

    Unquestionably the most important fasteners in any engine are the connecting rod bolts, as they hold the key to the entire rotating assembly. ARP High Performance series rod bolts are forged from 8740 chromoly steel. They feature rolled threads and large cold-formed fillets in the head-to-shank area for increased strength.

    • Up to 5x stronger than stock bolts
    • 200,000 psi tensile strength
    • Black oxide finish
    • Complete set for 8 rods
  • Scat 435010 Chevy 350 Crankshaft, 4340 Forged, 3.48 Stroke, 350 Main
    Scat 435010 Chevy 350 Crankshaft, 4340 Forged, 3.48 Stroke, 350 Main
    (Part #91515500)
    x
                

    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
    • 51 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 915-15500 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. 

  • French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
    French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
    (Part #2353050)
    x
                
    • Racesaver Sprint Series spec Brodix cylinder heads
    • Fully assembled
    • Heads are certified serial numbered
    • Ready and legal for use on a 305 c.i. Racesaver engine

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"Open Wheel, Cylinder Block Components" Page 1 of 20

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  • King HP Series 1969-Up Small Block Chevy Connecting Rod Bearings
    New
    King HP Series 1969-Up Small Block Chevy Connecting Rod Bearings
    (Part #910807HP)
    x
                These connecting rod bearing sets from King Engine Bearings feature bi-metal aluminum construction and are narrowed for use with large radius crankshafts.
    • Bi-metal aluminum silicon alloy featuring fine micro-bore finish
    • Mains and rods are narrowed for large radius crankshafts
    • Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM
    • 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
    • Choose the size that suits you
    • STD option: Rod bearing for Small Block Chevy, for 2.00" journal
    • The X001 option will give .001" extra oil clearance
    • The 001 option will gives you .001" less oil clearance
    • Sold as a Set
  • Light Forged SB Chevy Rotating Assembly, 383 Dome, 6 In Rods
    Light Forged SB Chevy Rotating Assembly, 383 Dome, 6 In Rods
    (Part #9153050)
    x
                

    Our lightweight forged rotating assembly engine rebuild kits include a 44-45 lb. Scat Superlight 4340 forged 2-pc rear main seal externally balanced crankshaft, Scat 4340 forged I-beam connecting rods and Mahle pistons complete with wrist pins, locks and rings. Rod and main bearings included. Standard size journals.

    Kit also includes balancing which is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience. A kit will ship in 24-48 hours.



  • Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore
    Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore
    (Part #30431611)
    x
                

    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)

  • French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
    French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
    (Part #2353050)
    x
                
    • Racesaver Sprint Series spec Brodix cylinder heads
    • Fully assembled
    • Heads are certified serial numbered
    • Ready and legal for use on a 305 c.i. Racesaver engine
  • Scat 2-350-5700-2100-QL Q-Lite S/B Chevy Forged H-Beam Rods, 5.7 Inch
    Scat 2-350-5700-2100-QL Q-Lite S/B Chevy Forged H-Beam Rods, 5.7 Inch
    (Part #91015238)
    x
                

    Premium Scat forged Q-Lite H-beam rods with ARP 2000 3/8" cap screws

    • Lightest H-beam design available without sacrificing strength
    • Special doweled cap
  • ARP Fasteners 234-4601 Small Block Chevy Undercut Head Studs
    ARP Fasteners 234-4601 Small Block Chevy Undercut Head Studs
    (Part #1012344601)
    x
                Install an ARP Small Block Chevy (SBC) head stud kit to enhance cylinder head sealing, ensure consistent torque values and help prevent damage to threads in the block. 

    All kits come with aerospace-quality nuts and parallel-ground, hardened washers.  Kits include undercut short studs that all but eliminate head gasket failure. Undercut studs have a narrowed area on the center of the stud shank. These undercuts add more tensile strength to the stud. 190,000 PSI.

    Not for raised runner heads.


  • Scat 350-4000-6000-21LW F43 Chevy Crankshaft 4 Stroke 350 Main 2.1 Rod
    Scat 350-4000-6000-21LW F43 Chevy Crankshaft 4 Stroke 350 Main 2.1 Rod
    (Part #91515240)
    x
                

    Lightweight, strong and at a price you can afford. These 4340 forged steel cranks will really make a difference in your performance.

    • Fits small block Chevy with 2-piece rear main seal
    • Straight shot & chamfered oil holes
    • Nitride hardened for superior wear resistance
    • Profiled and pendulum cut counterweights
    • Gun-drilled main line hole for lightening and equalization of crankcase pressure
    • Star tail for reduced weight
  • MAHLE Small Block Chevy 350 Powerpak Pistons, Dome, 6 Inch Rod
    MAHLE Small Block Chevy 350 Powerpak Pistons, Dome, 6 Inch Rod
    (Part #50325011)
    x
                

    The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 350 c.i. S/B Chevy (4.000" bore x 3.48" stroke).

    • Comp Height 6.0" Rod:  1.250
    • Pin Diameter:  0.927
    • Clearance Guide
      • *Meas. = 0.500
      • Min = 0.0025
      • Max = 0.0033

    *The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure. For all Mahle 350 pistons except 4V Flat 503-55004 for which Meas. = 0.465

    PowerPak Piston Chart Application (GIF)

  • Light Forged Small Block Chevy Assembly, 434 Dome, 6 Inch Rods, 350 Mains
    Light Forged Small Block Chevy Assembly, 434 Dome, 6 Inch Rods, 350 Mains
    (Part #9153065)
    x
                

    Our lightweight forged rotating assembly engine rebuild kits include a 44-45 lb. Scat Superlight 4340 forged 2-pc rear main seal crankshaft, Scat 4340 forged I-beam connecting rods and Mahle pistons complete with wrist pins, locks and rings. Rod and main bearings included. Standard size journals.

    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 included balance job will ship in 24-48 hours.

    Choose from standard, .030, or .040 oversize.

    NOTE: These rotating assemblies may require additional charges for heavy metal.

     


  • KB Chevy 350 Hypereutectic Pistons, Dish, 5.7 Rod
    KB Chevy 350 Hypereutectic Pistons, Dish, 5.7 Rod
    (Part #474193)
    x
                

    Keith Black Hyperutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by.

    For S/B Chevy 350 c.i. (4.000" bore x 3.48" stroke).

    • 390 Hypereutectic alloy
    • Fully machined crowns and valve reliefs
    • Drilled oil drain backs
    • Full floating wrist pins
    • Triple wound spiral locks
    • Reflective alloy allows 2% power increase
    • Quench dome technology minimizes deterioration
    • Zero deck quench designs
    • Lightweight wrist pins

    Ring Style Chart (GIF)

    474-193 Instructions (PDF)

  • Aluminum Freeze Plugs with Return
    Aluminum Freeze Plugs with Return
    (Part #91015925)
    x
                These are a set of four aluminum plugs that would replace freeze plugs on a S/B Chevy.  They have 1/2" NPT female pipe threads in the center of each one. 
            
  • Scat 4-400-4000-6000 434 Chevy 4340 Forged Crankshaft, 4.00 Stroke
    Scat 4-400-4000-6000 434 Chevy 4340 Forged Crankshaft, 4.00 Stroke
    (Part #91515575)
    x
                

    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.

    • 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
    • For 2-piece rear main blocks
    • 2.100" rod pin
    • 55 lbs.
  • LS Air Block Off Plate
    $9.99
    $14.99
    LS Air Block Off Plate
    (Part #91680913)
    x
                

    These air block-off plates are intended for use on non-pollution controlled, off-road vehicles only.

    • For GM LS engines
    • Hardware and Gasket are included
    • Measures 1-1/2" center-to-center on bolt holes

     

  • Scat 25700716 Small Block Chevy 4340 I-Beam Rods, 5.7 Inch, Bushed Pin
    Scat 25700716 Small Block Chevy 4340 I-Beam Rods, 5.7 Inch, Bushed Pin
    (Part #91015230)
    x
                

    These Scat Pro Comp 4340 forged bushed I-beam connecting rods come with huge 7/16" ARP cap screw bolts, which greatly increase strength and horsepower capabilities. In fact, Pro Comp series rods include some strength adders found in H-beam designs:

    • One-rib cap design for added strength and bearing support
    • Polished beams to eliminate stress risers
    • Special hollow dowels
    • Profile clearanced for stroker applications
  • KB Chevy 350 Hypereutectic Pistons, .150 Dome, 6.0 Rod
    KB Chevy 350 Hypereutectic Pistons, .150 Dome, 6.0 Rod
    (Part #474113)
    x
                

    Keith Black Hyperutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by.

    • 390 Hypereutectic alloy
    • Fully machined crowns and valve reliefs
    • Drilled oil drain backs
    • Full floating wrist pins
    • Triple wound spiral locks
    • Reflective alloy allows 2% power increase
    • Quench dome technology minimizes deterioration
    • Zero deck quench designs
    • Lightweight wrist pins

    For S/B Chevy 350 c.i. (4.000" bore x 3.48" stroke).

    Ring Style Chart (GIF)

    474-113 Instructions (PDF)

  • MAHLE Small Block Chevy 400 Dome Powerpak Pistons, 5.7 Inch Rods
    MAHLE Small Block Chevy 400 Dome Powerpak Pistons, 5.7 Inch Rods
    (Part #50342514)
    x
                

    The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks.  They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating.  PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 400 c.i. S/B Chevy (4.125" bore x 3.75" stroke).

    • Comp Height 5.7" Rod:  1.425
    • Pin Diameter:  0.927
    • Clearance Guide
      • *Meas. = 0.500
      • Min = 0.0025
      • Max = 0.0033

    *The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure.

    PowerPak Piston Chart (GIF)

  • Icon Chevy 350 Forged Pistons, .163 Dome, 5.7 Rod
    Icon Chevy 350 Forged Pistons, .163 Dome, 5.7 Rod
    (Part #474727)
    x
                

    Formerly KB Forged Pistons. Starting with 2618 alloy heat treated to high strength T-6 specifications, these give you the best value for your money. Exclusive V-rib adds strength without adding weight but allows maximum cooling. 

    For Chevy 350 c.i. (4.000" bore x 3.48" stroke). Use Style C rings (1/16", 1/16", 3/16").

    • High ductility 2618 alloy
    • Dual forced pin oiling on most applications
    • Lateral gas porting on higher compression ratios
    • Fully machined with deep valve pockets
    • Second land accumulator grooves
    • Top land mini groove technology
    • Diamond finished skirts
    • Triple wound spiral locks

    Ring Style Chart (GIF)

    474-727 Instructions (PDF)

  • Labor To Side Clearance Rods, Balance Rotating Assembly, 350/377 Kits
    Labor To Side Clearance Rods, Balance Rotating Assembly, 350/377 Kits
    (Part #91510200)
    x
                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. 


  • Forged Small Block Chevy Rotating Assembly, 383 Dome, H-Beam, 5.7 Rods
    Forged Small Block Chevy Rotating Assembly, 383 Dome, H-Beam, 5.7 Rods
    (Part #9151255)
    x
                

    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.

  • Scat 4-350-4000-6000 Chevy 4340 Forged Crankshaft-4 Stroke, 350 Main
    Scat 4-350-4000-6000 Chevy 4340 Forged Crankshaft-4 Stroke, 350 Main
    (Part #91515525)
    x
                

    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.

    • 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
    • For 2-piece rear main blocks
    • 2.100" rod pin
    • 408 & 434 Chevy Crankshaft
    • 54 lbs.
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