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AFD SP4V2.8 (3V) Bare CNC Ported Alloy Cleveland cylinder heads

AFD HEADS

  • $2,850.00


AFD SP4V2.8 CNC PORTED BARE SB - FORD ALLOY CLEVELAND CYLINDER HEAD

 

Material:                                            356 Alloy, T6 

Chamber Volume:                             57cc,64cc,68cc or 72cc

Intake Runner Volume:                     255cc 100% CNC Ported

Intake Port location                           raised .125” 3V design 

Minimum Cross Section:                   2.8 square inches MCSA 

Exhaust Runner Volume:                  135cc - high velocity

Exhaust Port Location                      Raised .080” (near stock location) 

Valve sizes                                       Intake 2.190” (50 degree seat, custom 5 angle)                                                                                                Exhaust 1.710” (45 degree seat custom high velocity radius) 

Valve Guide Angles:                        Canted Valve angles
                                                         Intake 10 x 4 degrees
                                                         Exhaust: 9.5 x 3.0 degrees 

Valve Guides:                                 Manganese Bronze .502” x 11/32” stems  from C.H.E

Valve Seat Inserts:                         Intake: 2.250” x 1.880 x 3/8 (Durabond 7000)                                                                                                   Exhaust: 1.750” x 1.430” x 3/8 

Spark Plugs:                                   Relocated for efficient fast burn
                                                        ¾ reach, 5/8 hex, washer seat (NGKBCP7ES) 

Spring Pads:                                  1.550” od/.560” id 

Valve Spring Height:                      1.960” (with stock length valve) 

Pushrods                                        5/16” or 3/8” (check required length)

Rocker Arm Studs                         7/16” unc

Rocker Arm Type                          7/16” stud mounted roller rockers (1.73 ratio)

 

 Note: Our heads are flow tested with our AFD custom stainless valves, the use of a different valve may and does change the flow test results, it can create turbulence if the wrong valve is used, we highly recommend the use of AFD valves


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