AFR 185cc SBF Renegade Street/Strip Cylinder Head
No heat riser or air pump holes for maximum street/strip performance
These heads come ready for the maximum street/strip Small Block Ford performance possible. AFR’s 185cc sport lightweight 8mm 2.020 intake and 1.600 exhaust valves with options for either 58cc or 72cc combustion chambers and 70cc exhaust ports. With AFR’s 3/4” thick head deck, it’s no problem handling that additional cylinder pressure. Each head is also drilled for the larger 1/2” head bolt for maximum head gasket retention as a standard feature of this serious race piece in street disguise.
Note:
Hydraulic roller cams typically experience valve float at 6000-6200
rpm because of their fast ramp rates. AFR suggests you upgrade your
springs to AFR part #8605, 1.290 O.D. with higher spring pressures
to reduce chances of valve float associated with rpm´s 6200 or
higher. (see footnotes here)
Note:Competition package exhaust port is raised .125 over stock.
185cc SBF Flow Chart
Tested on 4.060 Bore
185cc SBF Nitrous Exhaust Flow Chart
Tested on 4.060 Bore
185cc SBF Competition Flow Chart w/ .125 raised exhaust port
Tested on 4.060 Bore
Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7251
Bead Lock Intake Valve, 2.020" stud mount
AFR #7250
Bead Lock Exhaust Valve, 1.600" stud mount
AFR #8017
1.290" OD Hydraulic Dual Valve Spring, 135 lbs on seat, .600" maximum lift (upgrades available)
Specifications, Features, and Optional Supporting Components
100 ft. lbs with 1/2" stud
Head Torque
55-60 ft. lbs
Rocker Stud Torque
25-30 ft lbs.
Rocker Pedestal Torque
AFR #6832
Intake Port Gasket, 1.250" x 2.050" w/ 3/8" radius, Fel-Pro #1262
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6318
SB Ford 1/2" Bolt Head Bolt Kit, ARP #154-3603
AFR #6317
SB Ford 1/2" Bolt Head Stud Kit, ARP #254-4503
AFR #6324
Head Bolt Bushings, 1/2"-7/16", Standard ARP
Victor Jr.
Suggested Manifold
Autolite 3924
Spark Plug Starting Range
58cc or 72cc
Combustion Chambers
Can be cut to 1.625, no deeper
Spring Pocket
Standard
Valve Spacing
Standard, will not accept rail rocker arms
Rocker Arms
Standard
Valve Angle
.008" per cc
Angle Mill (10cc Maximum Optional Mill)
.006" per cc
Flat Mill (4cc Maximum Optional Mill)
Note: Milling head deck will affect flow numbers. |
