Cylinder Head

Victor Jr. Series Cylinder Head

Victor Jr. Series Cylinder Head; 23 Degree Small Block Chevy; 220cc; Complete For Hydraulic Roller Cam;

• Cylinder Head Type: 23 Degree
• Engine Make/Size: Chevy Small Block (262-400)
• Finish: Bare
• Preparation: Requires Professional Preparation (Bare)
• Type: Racing
• Usage: Racing
• WARNING CA Proposition 65: Yes
• WARNING CA Proposition 65 Message: WARNING: This product can expose you to Lead; which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information; visit www.P65warnings.ca.gov.

• Head Bolt Torque 65 ft./lbs. - In Steps 30/50/65
• 64cc Combustion Chamber Volume
• 220cc Intake Runner Volume
• 65cc Exhaust Runner Volume
• 9/16 in. Deck Thickness
• Valve Sizes 2.10 Intake/1.60 in. Exhaust/+0.100 Longer Than Stock
• 1.55 in. Valve Spring Dia/1.800 in. Installed Height
• Valve Spring Seat Pressure 130 lbs.
• Maximum Valve Lift 0.630 in.

Edelbrock Part # 61255 Victor Jr. 23 220 cylinder heads are designed for small-block Chevy Its 64cc combustion chamber yields around 10:1 compression ratio in a typical flat-top application and about 12.5:1 when used with some of the most common 12cc dome pistons. One of the key features of the Victor Jr. 23 220 cylinder heads is the CNC machined chambers and bowls, which result in consistency and improved performance. They also 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. All of this allows these cylinder heads to 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

When you design and sell the best-engineered performance products in the world, you have to have a rigorous testing program. Why? Without adequate testing, there's no way to stand behind your product with confidence. That's why every product we design and sell at Edelbrock is tested and approved by Edelbrock engineers in a real world environment on state-of-the-art equipment. Our three Super Flow computerized engine dynos are capable of measuring 11 separate engine variables up to speeds of 12,000 rpm. For 2007, we added a new Super Flow SF902 engine dyno. It's fully automated and programmable to simulate various driving situations, and is equipped with WinDyn software for the very latest in testing equipment. For real-world tuning, there's our Super Flow model SF-840 eddy-current chassis dyno that can handle up to 1,000 hp at the wheels and speeds of 200 mph. When all testing is completed, the results evaluated, and the part has passed all performance criteria, then, and only then, is the product deemed ready for production. These precise testing procedures are applied to the entire Edelbrock line for performance that's guaranteed. Edelbrock test vehicles are driven by Edelbrock engineers and employees to get a "real world" feeling for the performance improvements. Our products are also tested and used by professional race car teams and drivers. Working with these talented individuals is just another extension of our research and development process so when we say "proven performance" we really mean it! Top racing teams in all forms of motorsports rely on Edelbrock to produce parts that they can count on to win races and championships. Further underscoring our commitment to the racing community, Edelbrock is the only aftermarket intake manifold manufacturer licensed by NASCAR.