Edelbrock Part # 61255 Victor Jr.
220 23° cylinder heads are designed for small-block Chevy.
In a typical flat-top application, its 64cc combustion chamber yields around 10:1 compression ratio and about 12.5:1 when used with some of the most common 12cc dome pistons.
One key feature of the Victor Jr.
220 23° cylinder heads is the CNC machined chambers and bowls, which result in consistency and improved performance.
They feature angled spark plug holes and maintain the stock 23° valve angle as well as the intake flange bolt pattern for use with 1986 and earlier intake manifolds.
These cylinder heads deliver 530-580 HP potential right-out-of-the-box, making them ideal for a budget-minded engine build desiring a high-quality cylinder head that still uses a stud and guide plate rocker system.
Cylinder Head Specifications: Finish: Satin Designed for use with Hydraulic Roller camshafts Combustion chamber volume: 64cc Intake runner volume: 220cc Exhaust runner volume: 85cc Intake valve diameter: 2.10" Exhaust valve diameter: 1.60" Valve stem diameter: 5/16" Valve guides: Manganese bronze Deck thickness: 11/16" Valve spring diameter: 1.55" Valve spring maximum lift: .630" Rocker stud: 7/16" Guide plate: Hardened steel Pushrod diameter: 5/16" Valve angle: 23° Exhaust port location: Raised .300" Spark plug fitment: 14mm x .750 reach, gasket seat.
