109cc Combustion Chambers
Big Block Chevy 265cc Oval Port 24° Magnum Basic Package Components | |
50% CNC Ported Combustion Chambers | |
40% CNC Ported Exhaust Ports (Bowl Blend) | |
80% CNC Ported Intake Ports (Bowl Blend) & Gasket Port Match | |
Competition 5-Angle Valve Job | |
Intake Valve, 2.190'' x 5.460'' o.a.l. | |
Exhaust Valve, 1.880'' x 5.448'' o.a.l. | |
PAC Racing 1.550'' OD Solid Roller Valve Spring, 225 lbs. on seat, .680'' maximum lift, max RPM 7200-7400 | |
10º 1.450'' Chrome Moly Retainers | |
10º Valve Locks | |
7/16'' Rocker Studs | |
Adjustable 3/8'' Guide Plates | |
Viton Valve Seals | |
Hardened Spring Seat | |
Intake Valve Seats | |
Exhaust Valve Seats | |
Bronze Valve Guides | |
Big Block Chevy 265cc Oval Port 24° Magnum Street Head Specifications | |
Head Torque w/Moly Lube | 75 Ft. Lbs. |
Rocker Stud Torque | 55 Ft. Lbs. |
Intake Port Gasket | Fel-Pro 375-1212 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket. |
Exhaust Port Gasket | AFR 033-6858 |
Head Gasket | 4.540'' Bore, Fel Pro 375-1017 AFR 033-6850 |
Head Bolts & Studs | Standard ARP |
Head Bolt Washers | Manley Standard |
Stud Girdle | AFR 033-6210 |
Suggested Manifold | Weiand Stealth or Edelbrock Vic Jr. or RPM Performer |
Spark Plug Starting Range | Autolite 3935 |
Combustion Chambers | 109cc As Cast |
Intake Port Volume | 265cc As Cast |
Exhaust Port Volume | 115cc As Cast |
Spring Pocket can be cut to 1.750, no deeper. | |
Valve Spacing | Standard |
Rocker Arms | Standard |
Valve Angle | 24° / 4° Intake ; 15° / 4° Exhaust |
Angle Mill, 97cc Maximum | .009'' per cc |
Flat Mill, 102cc Maximum | .006'' per cc |
NOTE: | Flat and Angle mills might require a .120'' thick head gasket. |
Specifications:
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.