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- AFR Gen3 HEMI Blackhawk Heads
For all out Gen III Hemi performance, AFR's 224cc Black Hawk cylinder heads leave no expenses spared for your 5.7/6.1L or 6.2/6.4L. Manufactured from A356 aluminum using permanent-mold technology, AFR's 224cc Black Hawk Gen III Hemi Aluminum Cylinder Heads feature 100% CNC ported intake ports, exhaust ports & combustion chambers. They are outfitted with our trademarked .750” thick head deck to meet the boost and power demands of today’s OEM and aftermarket engines. We have improved the water jacketing for enhanced cooling while retaining a minimum of .200” port to water jacket thickness. Machine option available to add bolt hole and dowel provisioning for Hellcat superchargers. Designed for use with hydraulic roller camshafts up to .650” of lift, these heads are available in three different versions. Please see footnotes for additional information.
| Included Components | |
| 100% CNC Intake Ports | |
| 100% CNC Exhaust Ports | |
| 100% CNC Combustion Chambers | |
| Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve 2.165” x 5.135” O.A.L. | |
| 8mm Bead Lock Exhaust Valve 1.650” x 5.150” O.A.L. | |
| PAC Racing Springs 1.270” OD Hydraulic Roller Dual Valve Drag Race Spring, 155 lbs. on seat, .650” maximum lift, Max RPM 7000-7200 (upgrades available) | |
| 10° Titanium Retainers 1.245” O.D x .885” I.D x .655” I.D | |
| 10° 8mm Valve Keepers with lashcap recess | |
| Hardened Valve Spring Cup 1.380" O.D x 1.300" I.D x .570" I.D | |
| 224cc Gen III Hemi As Cast Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | |
| Int | 160 | 235 | 303 | 355 | 373 | 380 | 385 | 390 |
| Exh | 127 | 170 | 215 | 238 | 242 | 251 | 255 | 258 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum |
| MSCA Minimum Cross Section Area |
3.010 in2 |
| Intake Port Volume |
224cc |
| Intake Port Dimension |
1.95"Wx1.95"H |
| Intake Port Location |
Stock |
| Exhaust Port Volume |
64cc |
| Exhaust Port Dimension |
1.865"Wx1.285"H |
| Exhaust Port Location |
Stock |
| Combustion Chamber Size |
69cc |
| Valve Cover Bolt Pattern |
Perimeter Bolt |
| Valve Angle |
Stock |
| Valve Spring Pocket Diameter |
1.625" |
| Max Valve Spring Pocket Machining |
Do Not Machine |
| Deck Thickness |
.750" |
| Minimum Bore Diameter |
3.197" |
| Flat Mill |
.006" per cc/ Maximum 62cc as cast chamber |
| Angle Mill |
.009" per cc/ Maximum 60cc as cast chamber |
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Spark Plug Dimensions |
14mm x 1" |
| 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 |
OE Rubber Seal |
| Hellcat/Blower Intake Port Gasket |
68271246AA |
| Important: Do not use your OE gasket as a template to port match your intake manifold. | |
| Exhaust Port Gasket |
OE |
| Head Bolts |
OE |
| Head Studs |
OE |
| Rocker Arms (For Optimized Geometry) |
OE |
| Shaft Mount Rocker Arms T&D |
TD#8631 |
| Important: Do not use TD 8630 Adjustable Shaft Mount Rockers. Adjuster nut hits the valve cover and cannot be used. | |
| Suggested Manifold |
OE |
| Spark Plug Starting Range |
Autolite AR-5324 Race Plug |
