CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
The BB-1 rectangular port head has a 280 cc intake port and a 119 cc combustion chamber, but may be angle
milled to 108 cc or angle machined to 98 cc. The BB-1 is designed for a 396 to 502 engine with a flat tappet or
hydraulic cam. Most marine applications use this head for torque and throttle response. The BB-1 also comes
completely CNC ported. The 305 cc intake port flows over 370 cfm and has maximum port velocity.
The BB-2 and BB-2 Plus heads work well with a heavy car and smaller engine (427-509 cu in). The BB-2 has a
305 cc intake port and flows 320 cfm; the BB-2 Plus has a 312 cc intake port and flows over 340 cfm with only
the bowls blended and the intake ports matched. Both heads may be purchased angle milled to 110 cc. The
combustion chambers are 119 cc and are properly shaped for use with either methanol or gasoline, preventing
detonation. While creating the BB-2 Plus CNC, the professionals at BRODIX invested many long hours on
the flow bench and at the track developing a completely ported cylinder head. The BRODIX porting design
was incorporated into a 100% CNC ported masterpiece that can be mass produced. The CNC ported BB-2
Plus castings are CNC ported to a mirror finish and flow within 1% of each other. The bottom line is that our
customers can now buy the most accurate, best flowing out-of-the-box cylinder heads available at the best price.
All of these cylinder heads accept standard pistons, intake manifolds, and rocker arms. The exhaust ports are
raised .600 higher than stock, and the valve cover rails are now raised to assure no oil leakage.
Package Heads:
• PS CB: VALVE BOWLS BLENDED• PS MI: MATCH INTAKE PORT TO BRODIX MG 2001• PS Valve Job: COMPETITION VALVE JOB• Intake Valves: 2.250 X 5.218 o.a.l. - BR 81040 (STANDARD PACKAGE) 2.250 X 5.318 o.a.l. - BR 81140 (SPRING UPGRADE)• Exhaust Valves: 1.880 X 5.394 o.a.l. - BR 81038 (STANDARD PACKAGE) 1.880 X 5.494 o.al. - BR 81138 (SPRING UPGRADE)• Valve Springs: 1.550 ROLLER VALVE SPRING - GA 1000, 240 lb CLOSED, 550 lb OPEN, 1.950 INSTALLED HEIGHT, .700 MAXIMUM LIFT (STANDARD PACKAGE) 1.625 ROLLER VALVE SPRING - MA 221424, 260 lb CLOSED, 790 lb OPEN, 2.100 INSTALLED HEIGHT, .800 MAXIMUM LIFT (SPRING UPGRADE)• Retainers: 1.550 10° STEEL - CC 752 1.625 10° TITANIUM - MA 23640• Valve Locks: 10° JUMBO - CC 611• Rocker Studs: 7/16 - BR 716L, AR RRS-4I• Guide Plates: 3/8 - CC 4806• Valve Seals: 11/32 - USVS529V
FACTS AND RELATED COMPONENTS:
• Torque Heads: 70 ft-lb• Torque Rocker Studs: 40-45 ft-lb• Intake Gaskets: BRODIX MG 2001, COMETIC C5428, FEL-PRO 1252-3• Head Gaskets: 4.310 - FEL-PRO 1027, COMETIC C5432 4.540 - FEL-PRO 1017, COMETIC C5433• Exhaust Gaskets: FEL-PRO 1411, COMETIC C5429• Head Bolts: ARP 135-3606, MANLEY 42192• Head Studs: ARP 235-4702 (12 pt)• Accessory Bolt Holes Are Drilled• Spark Plug Starting Points: NGK R5671A-9 FOR ALCOHOL NGK R5671A-8 FOR RACING GAS• Spring Pockets: MAY NOT BE CUT ANY LARGER OR DEEPER THAN 1.625• Valve Angle: 26° AND 4° INTAKE, 17° AND 4° EXHAUST• Angle Milling: .0066 in PER cc• Flat Milling: .0050 in PER cc• Angle Machining: NOT AVAILABLE ON CNC PORTED HEADS• Dowel Shift: NOT AVAILABLE• Pushrod Slots: STANDARD• Stud Girdle: STANDARD, BRODIX 1230• Rocker Arms: STANDARD• Lifters: STANDARD• Pistons: STANDARD• Pushrods: CHECK PUSHROD CLEARANCE WITH HEAD INSTALLED ON THE ENGINE BLOCK BEFORE FINAL ASSEMBLY
Cylinder Head Specification:INTAKE CHAMBER VALVE SIZES EXHAUST VALVE INTAKE
PORT VOLUME INT./EXH. PATTERN CENTERLINE MANIFOLD
BB-1 280 cc 119 cc 2.250/1.880 Standard Standard HV 2016 / HV 2000
STS BB-1 305 cc 119 cc 2.250/1.880 Standard Standard HV 2000 / HV 2001
BB-2 305 cc 119 cc 2.250/1.880 Standard Standard HV 2000 / HV 2001
BB-2 PLUS 312 cc 119 cc 2.250/1.880 Standard Standard HV 2000 / HV 2001
STS BB-2 PLUS 320 cc 119 cc 2.250/1.880 Standard Standard HV 2000 / HV 2001
Cylinder Head Recommendations:
CUBIC INCH COMPRESSION CAMSHAFT RPM APPLICATION
BB-1 396 - 502 10.5 Minimum Hydraulic Roller / Flat Tappet 2000 - 6500 Pro Street / Drag Race
STS BB-1 427 - 502 12.0 Minimum Flat Tappet / Roller 3500 - 7000 Pro Street / Drag Race
BB-2 477 - 482 11.5 Minimum Flat Tappet / Roller 4000 - 7000 Pro Street / Drag Race
BB-2 PLUS 427 - 509 11.5 Minimum Flat Tappet / Roller 4000 - 7200 Pro Street / Drag Race
STS BB-2 PLUS 468 - 522 11.5 Minimum Flat Tappet / Roller 4000 - 7200 Pro Street / Drag Race
Flow Chart CFM @ 28" H20
VALVE SIZE 0.200 0.300 0.400 0.500 0.600 0.700 0.800
BB-1 2.250 INTAKE 150 209 259 290 300 303
1.880 EXHAUST 106 137 166 190 211 225
STS BB-1 2.250 INTAKE 168 252 314 348 368 375 379
(CNC Ported) 1.880 EXHAUST 130 166 200 235 264 283 295
BB-2 2.250 INTAKE 157 212 263 294 312 320
1.880 EXHAUST 107 137 166 190 214 226
BB-2 PLUS 2.250 INTAKE 150 215 265 311 334 344
1.880 EXHAUST 122 148 187 216 229 238
STS BB-2 PLUS 2.250 INTAKE 162 244 285 328 359 369 373
(CNC Ported) 1.880 EXHAUST 132 169 204 234 261 274 284
BASIC EASY ORDER NUMBER: 1.625 spring diam. titanium retainers
• BB-2 Plus Pkg 119 Chamber 2021014 MAKE OFFER PER 1
• BB-2 Plus Pkg 115 Chamber 2021018 MAKE OFFER PER 1
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