BRODIX BBC BB-4 AND BB-5 SERIES CYLINDER HEADS/24 2051000

Regular price $ 1,808.97

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

The BRODIX -4 and -5 valve angles have been rolled 2° from stock to produce more torque and less
chamber volume. The -4 and -5 have a raised intake port design (approximately .400”) allowing the
short-turn radius a better air flow angle without sacrificing velocity. Our competitors offer a similar
version of these heads, but they have larger intake ports in the stock location. The competitor ’s low
profile head slows down the air speed making the engine extremely lazy. When Sonny Leonard designed
the -5 cylinder head for larger cubic inch engines, he incorporated the most important things: correct
port shape, volume, and velocity. If you want to take the next step up from a standard valve angle
cylinder head, the BRODIX -4 or -5 is the ticket.

Package Heads:

• PS CB: VALVE BOWLS BLENDED• PS MI: MATCH INTAKE PORT TO BRODIX MG 2001• PS Valve Job: COMPETITION VALVE JOB• Intake Valves: 2.300 X 5.468 o.a.l. - BR 81241 (STANDARD PACKAGE) 2.300 X 5.568 o.a.l. - BR 81341 (SPRING UPGRADE) 2.350 X 5.568 o.a.l. - BR 81351 (SPRING UPGRADE)• Exhaust Valves: 1.880 X 5.394 o.a.l. - BR 81038 (STANDARD PACKAGE) 1.880 X 5.494 o.a.l. - BR 81138 (SPRING UPGRADE) 1.900 X 5.494 o.a.l. - BR 81139 (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 - US VS529V

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 4.600 - FEL-PRO 1057, COMETIC C5434• 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: 24° AND 4° INTAKE, 15° AND 4° EXHAUST• Angle Milling: .0066 in PER cc• Flat Milling: .0050 in PER cc• Angle Machining: NOT AVAILABLE• Dowel Shift: NOT AVAILABLE• Pushrod Slots: STANDARD• Stud Girdle: STANDARD, BRODIX 1230• Rocker Arms: STANDARD• Lifters: STANDARD• Pistons: 2° VALVE ROLLED PISTON• Pushrods: CHECK PUSHROD CLEARANCE WITH HEAD INSTALLED ON THE ENGINE BLOCK BEFORE FINAL ASSEMBLY

 

Cylinder Head Specifications:

                                    INTAKE    CHAMBER    VALVE SIZES         EXHAUST               VALVE                        INTAKE 

                                     PORT         VOLUME          INT./EXH.             PATTERN        CENTERLINE                MANIFOLD

BB-4                           340 cc           119 cc           2.300/1.880             Standard             Standard             SA 2012 / SA 2020
STS BB-4 XTRA      390 cc           119 cc           2.350/1.880-1.900  Standard             Standard             SA 2012 / SA 2020
BB-5                           387 cc           119 cc           2.350/1.900             Standard              Standard             SA 2012 / SA 2020

              CUBIC INCH      COMPRESSION     CAMSHAFT            RPM                      APPLICATION

BB-4                       509 - 555                 13.1 Minimum                   Roller                 4000 - 7500                    Pro Street / Drag Race
STS BB-4 XTRA   565 - 632                 13.1 Minimum                   Roller                 4000 - 7500                    Pro Street / Drag Race
BB-5                       565 - 632                 13.1 Minimum                   Roller                 4000 - 7500                    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-4                                            2.300 INTAKE            151              211             261             303             334              361
                                                     1.880 EXHAUST        132              161             188             216              236              252
STS BB-4 XTRA                        2.350 INTAKE            141              206             275             327              382             425              447
4.600 BORE (CNC Ported)       1.900 EXHAUST         122              156             190             222              245              263             276
BB-5                                            2.350 INTAKE            108              150             203             258              309              354             384
                                                     1.900 EXHAUST         77               103             134             167              200              222             238

1.625 spring diam. TI

• BB-4 Pkg 119 Chamber 2051000 MAKE OFFER PER 1

  • Free shipping 48 states

  • Layaway terms available

  • No one sells BRODIX for less.

  • We handle the complete BRODIX line.

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CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

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