Description
AFR – Airflow Research 3610-1 – AFR Big Block Chevy 265cc Oval Port Magnum Aluminum Cylinder Heads Details
113cc 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. | ||
| 1.550” OD Hydraulic Roller Dual Valve Spring, 170 lbs. on seat, 473 lbs @ .600” maximum lift, max RPM 6300-6500 | ||
| 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 1212 – DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket. | |
| Exhaust Port Gasket | AFR 6858 | |
| Head Gasket | 4.540” Bore, Fel Pro 1017 AFR 6850 |
|
| Head Bolts & Studs | Standard ARP | |
| Head Bolt Washers | Manley Standard | |
| Stud Girdle | AFR 6210 | |
| Suggested Manifold | Weiand Stealth or Edelbrock Vic Jr. or RPM Performer | |
| Spark Plug Starting Range | Autolite 3935 | |
| Combustion Chambers | 113cc 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. | |
