Big Victor Spread-Port CNC- 405cc Cylinder Heads For B/B Chevy


Big Victor CNC- 405cc Cylinder Heads For B/B Chevy by Edelbrock
 
  • Cylinder Head Specifications:
  • Combustion chamber volume: 92cc
  • Intake runner volume: 442 (lh) / 451 (rh)
  • Exhaust runner volume: 189cc
  • Intake valve diameter: 2.45" (Valves Not Included)
  • Exhaust valve diameter: 1.85" (Valves Not Included)
  • Valve stem diameter: N/A
  • Valve guides: Manganese bronze
  • Deck thickness: N/A
  • Valve spring diameter: Pocket diameter 1.76" (springs not included)
  • Valve spring maximum lift: N/A
  • Rocker stud: Use Jesel KPS-381754 shaft-mount
  • Guideplate: N/A
  • Pushrod diameter: N/A
  • Valve angle: 18° x 4.0° intake | 9° x 3.9° exhaust
  • Exhaust port location: N/A
  • Spark plug fitment: 14mm x 3/4 reach, gasket seat
 
Intended for high output, large cubic inch racing engines with 4.84" bore spacing, this head is an improvement over existing 18° designs, such as the Big Chief & Big Duke. The casting is made from A-356 aluminum and is Hot Isostatic Pressing processed (HIP) for superior strength, durability, dimensional stability and exceptional finish quality. These heads feature CNC ported intake ports and a raised exhaust runner design for improved flow efficiency. Chambers are fully CNC ported and extra material is included in the deck to allow fine tuning of the combustion chamber design, if desired. Edelbrock and Pat Musi worked with Jesel to improve the valvetrain geometry, delivering Pro-Stock level technology on engines up to 10,000 rpm. Jesel's shaft-mounted system, #KPS-387154, is made from lightweight 7000 series aluminum and features a one-piece stand design that pairs the intake and exhaust stands for improved valvetrain stability. The intake features a 1.820" long fulcrum and is available in 1.60:1 - 1.95:1 rocker ratios; the exhaust features a 2.000" long fulcrum and available in 1.60:1 - 2.00:1 rocker ratios. Requires Edelbrock valve covers #4259. Match with Edelbrock Victor CNC Series manifolds #28003 and #28005. Pro-Port version available for custom porting.
  Bare (Single)
Application Dyno Emissions Satin
Big Victor CNC 18° - 617569
Big Victor CNC 12° - 618268
Big Victor CNC 14° - 618368
#617569: Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
Valve Lift .100" .200" .300" .400" .500" .600" .700" .800" .900"
Intake 63 150 223 288 353 415 468 496 491
Exhaust 60 137 190 226 254 277 302 324 328
Edelbrock Tech Note TECH NOTE: Please view Cylinder Head Flow Data and Valve Springs & Retainers for all Edelbrock Performance Aluminum Cylinder Heads.
Edelbrock Tech Note PRODUCT EMISSIONS GUIDE
The following guide is designed to help you determine which Edelbrock components are legal for use on your vehicle. Learn more about Edelbrock Product Emissions Guide.

    50-State Legal
    For Racing Use ONLY
    For Use on Pre-Pollution Controlled Vehicles (PPCV)
    Stock Replacement Part
    Engine Swaps