Description
AFR – Airflow Research 3610 – AFR Big Block Chevy 265cc Oval Port Magnum Aluminum Cylinder Heads Details
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. | ||
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 |
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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 | 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. |