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Chevrolet Performance 24502503

Cast Iron Bow Tie Race Block, SB Chevy (350 Main)

Chevrolet Performance 24502503

809-24502503

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Estimated ship date 11/27/17 if Ordered Today
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Truck Freight: $119.00
Chevrolet Performance 24502503 Cast Iron Bow Tie Race Block, SB Chevy (350 Main) $2,287.16
Cast Iron Bow Tie Race Block
  • Small Block Chevy (350 Main)
  • Standard Deck: 9.025''
  • Tested to 700+ Horsepower
  • 3.980'' Finished Bore (4.155'' Maximum)

  • Chevrolet Performance 24502503 Details

    Standard Deck

  • 2.000'' OD cam bearings required (1.867'' ID)
  • Cylinder bore wall thickness is 0.225'' minimum at 4.155'' maximum bore
  • Oil passages for dry sump system are oversized and tapped for pipe plugs

  • Specifications:

    Rear Main Seal Style
    2-piece
    Cam Bearings Included
    No
    Cylinder Bore as Shipped (in.)
    4
    Cylinder Bore Diameter (in.)
    4
    Deck Height (in.)
    9.025
    Engine Block Material
    Cast iron
    Engine Block Style
    Stock/OEM standard deck
    Finished Cylinder Bores
    Yes
    Freeze Plugs Included
    Yes
    Main Bearings Included
    No
    Main Bolt Style
    4-bolt
    Main Cap Fasteners Included
    Yes
    Main Cap Material
    Steel
    Main Caps Included
    Yes
    Main Journal Type
    350 mains
    Quantity
    Sold individually
    Raised Cam Location
    No
    Manufacturer's Part Number:
    24502503

    Proven in NASCAR and NHRA, Chevrolet Performance Bow Tie Race Blocks produce big power. These cast iron engine blocks use premium materials throughout and have full race-prep CNC-machining with tighter tolerances than standard Bow Tie Blocks.

    Features
  • Cast iron block
  • CNC-machined for +/- 0.001'' tolerances
  • SAE 8620 steel 4-bolt mains (20° splayed caps on the three center mains)
  • Extra-thick main bearing bulkhead machined at 5°
  • Priority main oiling system
  • Siamese bores
  • Nominal wall thickness of cylinder bores is 0.340''
  • Enlarged cam bosses allow custom machining for larger bearings
  • Bearing cap inner bolts spread 0.210'' to accept machining of 400 journal crankshafts
  • Extra-thick deck surfaces have blind-tapped head bolt holes for superior head gasket sealing
  • Cylinder decks, front and rear of case, oil pan rail surfaces, and head dowel pins are blueprinted

    Technical Notes
  • Check timing system clearance before engine assembly
  • Non-standard cam bearings required (Click More Info below)
  • 2-piece rear main crankshafts and pre-1986 oil pans required
  • Billet wet sump rear main cap can be adapted to dry sump with plugs
  • Some aftermarket mechanical roller lifters may require clearancing at top of lifter bores
  • Lifter valley oil scavenging boss (below bellhousing flange) and oil dipstick holes are not drilled

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