AFR1074
AFR's 227cc "Race Ready™" and “Competition” heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details. Please see footnotes for additional information.
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.
| 227cc Aluminum SBC Cylinder Heads | |||
|---|---|---|---|
| Part # | Exhaust Port | Porting Finish | Combustion Chamber |
| 1067 | Stock | Race Ready™ | 75cc |
| 1068 | Stock | Race Ready™ | 65cc |
| 1120 | Stock | Competition | 75cc |
| 1121 | Stock | Competition | 65cc |
| 1074 | Spread Port | Race Ready | 65cc |
| 1075 | Spread Port | Race Ready | 75cc |
| 1124 | Spread Port | Competition | 65cc |
| 1125 | Spread Port | Competition | 75cc |
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| 227cc Race Ready™ Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | |
| Int | 148 | 210 | 261 | 296 | 304 | 312 | 315 | 318 |
| Exh | 116 | 155 | 204 | 220 | 225 | 229 | 233 | 237 |
| 227cc Competition Flow Chart | |||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | .750 | |
| Int | 152 | 212 | 260 | 292 | 310 | 316 | 322 | 327 | 329 |
| Exh | 120 | 160 | 214 | 230 | 234 | 238 | 241 | 243 | 245 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", intake 3/4" radius plate exhaust, 1 7/8" curved pipe
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5-angle Valve Job | |
| 8mm Bead Lock Intake Valve, 2.100" x 5.000" Overall Valve Length | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | |
| PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, - 260* max recommended duration, Max RPM 7200-7400 | |
| 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D | |
| 10° Bead Lock Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D | |
| Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep | |
| 8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| Recommended Components: | |
| 1.5 T&D Shaft Mount w/ .450" off-set | |
| 1.6 T&D Shaft Mount w/ .450" off-set | |
| 1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset | |
| 1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset | |
| Intake Gasket | |
| 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 | |
| Head Gasket, 350cid Fel-Pro #1003 | |
| Head Gasket, 400cid Fel-Pro #1014 | |
| SB Chevy Head Bolt Kit, ARP #134-3701 | |
| SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 | |
| Head Bolt Washers, Manley | |
| Stud Girdle AFR Offset | |
| Suggested Manifold | |
| Suggested Manifold | |
| Spark Plug Starting Range |
Autolite 3922
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
227cc
|
| Intake Port Dimension |
2.200" H x 1.290" W 5/16 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
80cc
|
| Exhaust Port Dimension |
1.430" H x 1.540" W
|
| Exhaust Port Location |
.250" Raised
|
| Combustion Chamber Size |
65cc or 75cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
23°
|
| Valve Spring Pocket Diameter |
1.580" O.D
|
| Max Valve Spring Pocket Machining |
1.680" O.D
|
| Warning: Do not machine spring pad any deeper. | |
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 60cc Maximum
|
| Angle Mill |
.009" per cc 55cc Maximum
|
| Note: Angle mills might require .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.340 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
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$19.99 CAD | $24.99 CAD
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$19.99 CAD | $24.99 CAD
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$19.99 CAD | $24.99 CAD
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