The all-new BBC 335cc Enforcer cylinder head features its 2.250" intake valves, 1.880" exhaust valves and come equipped with their 8002 hydraulic roller valve springs. This combination will support a 0.725" lift camshaft and up to 6,700 RPM. They come fully assembled with the identical components found in their higher-end CNC ported cylinder head; such as ARP rockers studs, PAC Racing Springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) their one-piece 8mm 21 4N Stainless Steel valves.
Sold as a single piece, 2 pieces required per engine.
| 335cc BBC Enforcer Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .700 | |
| Int | 140 | 207 | 265 | 296 | 336 | 355 |
| Exh | 119 | 172 | 211 | 239 | 249 | 255 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Basic Package Components | Part # |
| 3-angle Valve Job As Cast Combustion Chambers As Cast Exhaust Ports As Cast Intake Ports |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | AFR #7620 |
| 11/32” Nail Head Exhaust Valve, 1.880” x 5.450” O.A.L. | AFR #7630 |
| PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 | AFR #8002 |
| 10º Manley Steel Retainers 1.500” O.D x 1.120” I.D x .705” I.D | AFR #8511 |
| 10° 11/32" Valve Locks with lashcap recess | AFR #9005 |
| ARP 7/16" Rocker Exhaust Studs | AFR #6406 |
| ARP 7/16" Rocker Intake Studs | AFR #6407 |
| 3/8” Guide Plates | AFR #6110 |
| 11/32" Viton Valve Seals | AFR #6613 |
| Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D | AFR #8048 |
| Specifications, Features, and Optional Supporting Components |
| Head Material |
A356 Aluminum |
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| Intake Port Volume | 335cc | ||
| Intake Port Dimension |
2.510"H x 1.820"W x 3/8" Radius |
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|
Intake Port Location
|
Stock |
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| Exhaust Port Volume | 140cc | ||
| Exhaust Port Dimension |
1.690"H x 1.900" W |
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| Exhaust Port Location | Raised .375" | ||
| Combustion Chamber Size |
122cc |
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|
Valve Cover Bolt Pattern
|
Perimeter Bolt | ||
| Valve Angle |
24°/4° Int, 15°/4° Exh |
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| Valve Spring Pocket Diameter |
1.750" |
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| Max Valve Spring Pocket Machining |
1.750" |
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|
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|
Deck Thickness
|
0.45"" |
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| Minimum Bore Diameter | 4.25" |
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| Intake Port Gasket | AFR #6856 | ||
| Exhaust Port Gasket |
AFR #6856 |
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| Head Gasket, Fel-Pro #1047 (Gen V and VI) |
AFR #6849 |
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| Head Gasket, Fel-Pro #1017-1 (Gen IV) |
AFR #6850 |
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| Head Bolts, ARP 135-3703 (Gen IV) |
AFR #6306 |
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| Head Bolts, ARP 135-3707 (Gen V) |
AFR #6308 |
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| Head Studs, ARP 235-4713 |
AFR #6307 |
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| Head Bolt Washers, Manley |
AFR #6320 |
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| Suggested Manifold |
Victor Jr or Super Victor |
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| Flat Mill | .006" per cc/ Maximum 105cc As Cast | ||
| Angle Mill | .009" per cc/Maximum 100cc As Cast | ||
| Spark Plug Starting Range | Autolite 3924 | ||
