AFR BBC 265/112cc oval port hydaulic roller heads (pair)
SKU: AFR3610-1
$5,585.61
| AFR BBC 265/112cc oval port hydaulic roller heads (pair) |
Description
Our small port, high velocity 265cc cylinder heads are a cost effective choice compared to re-worked factory big block chevy cylinder heads. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend; this torque monster is capable of flowing 354 CFM at 0.650″ lift. Recommended for street, street/strip and towing applications with displacements up to 468 cubic inches operating at or below 6200 RPM.
| Included Components | |
| 75% CNC Ported Exhaust Ports (Bowl Blend), 75% CNC Chambers | |
| 80% CNC Ported Intake Ports (Bowl Blend) | |
| Competition 5-angle Valve Job | |
| 11/32″ Intake Valve, 2.190″ x 5.460″ Overall Valve Length |
AFR #7601
|
| 11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450″ Overall Valve Length |
AFR #7630
|
| PAC Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 220 lbs. on seat, .710” maximum lift, – 260* max recommended duration, Max RPM 7200-7400 (upgrades available) |
AFR #8000
|
| PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 |
AFR #8002
|
| 10° Steel Retainers 1.500″ O.D x 1.120″I.D x .705″ I.D |
AFR #8511
|
| 10° 11/32″ Valve Keepers with lashcap recess |
AFR #9005
|
| ARP 7/16″ Rocker Studs Intake |
AFR #6407
|
| ARP 7/16″ Rocker Studs Exhaust |
AFR #6406
|
| Adjustable 3/8″ Guide Plates |
AFR #6109
|
| 11/32″ Viton Valve Seals |
AFR #6613
|
| Hardened Valve Spring Cup 1.655″ O.D x 1.565″ I.D – For 8002 Spring |
AFR#8044
|
| Hardened Valve Spring I.D Locator 1.550″ O.D x .780″ I.D – For 8000 Spring |
AFR #8048
|
| Intake Valve Seats 2.450″ O.D x 1.950″ I.D x .375″ Deep |
AFR #9065
|
| Exhaust Valve Seats 2.000″ O.D x 1.580″ I.D x .375″ Deep |
AFR #9064
|
| 11/32″ Intake Bronze Valve Guides .502″ O.D x 2.10″ O.A.L |
AFR #9041
|
| 11/32″ Exhaust Bronze Valve Guides .502″ O.D x 2.25″ O.A.L |
AFR #9042
|
| 265cc As Cast Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 154 | 218 | 278 | 323 | 330 | 333 | 335 |
| Exh | 127 | 164 | 200 | 230 | 250 | 255 | 260 |
| 265cc w/ 100% CNC Chamber Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 164 | 236 | 291 | 326 | 330 | 335 | 340 |
| Exh | 135 | 190 | 230 | 258 | 265 | 274 | 280 |
Test conducted at 28″ of water (pressure) on Superflow 1020
Bore Size: 4.310″, intake 3/4″ radius plate exhaust, 1 7/8″ curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
265cc
|
| Intake Port Dimension |
2.030″H x 1.830″W x1/2 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.770″H x 2.010″ W
|
| Exhaust Port Location |
.375″ Raised
|
| Combustion Chamber Size (Partial CNC) |
109cc
|
| Combustion Chamber Size (Full CNC) |
112cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725″ O.D
|
| Max Valve Spring Pocket Machining |
1.750″ O.D
|
| Deck Thickness |
.750″
|
| Minimum Bore Diameter |
4.125″
|
| Flat Mill |
.006″ per cc/ Maximum 102cc as cast or CNC chamber
|
| Angle Mill |
.009″ per cc/ Maximum 97cc as cast or CNC chamber
|
| Note: Angle mills might require a .120″ Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.640 sq. in.
|
| Spark Plug Dimensions |
14mm x .750″ w/Gasket Seat
|
| CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. | |
| Recommended Components: | |
| Intake Port Gasket |
AFR #6863
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket |
AFR #6858
|
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) |
AFR #6202
|
| 7/16 Stud Mount Rocker Arms – 1.7 Ratio (For Optimized Geometry) |
AFR #6043
|
| 1.7 Shaft Mount Rocker Arms T&D |
AFR #6065
|
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
AFR Magnum Dual Plane
|
| Suggested Manifold |
Air Gap #7561
|
| Spark Plug Starting Range |
Autolite 3924
|
Additional information
| Part Number | AFR3610-1 |
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