Brodix BB-3 XTRA 327 Series 24 Degree Assembled Cylinder Head [Big Block Chevy]
158-2031035
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Items You Need
BB-3 XTRA 327 Series Cylinder Heads
Cylinder Head Specifications
- Material: A-356 Virgin Aluminum
- Intake Port Volume: 327 cc - Rectangle Port
- Combustion Chamber Volume: 115 cc
- Valve Angle: 24 and 4 Degree Intake, 15 and 4 Degree Exhaust
- Valve Sizes: 2.300 in. Intake / 1.880 in. Exhaust (11/32 in. Stem Diameter)
- Valve Springs: 1.550 in. Diameter; 240 lbs. Seat Pressure
- Steel Valve Retainers
- Raised Valve Cover Rail
- Spark Plug Configuration: Angled
- Drilled Accessory Bolt Holes
Facts and Related Components
- Torque Heads: 70 ft-lb.
- Torque Rocker Studs: 40-45 ft-lb.
- Intake Gasket: Brodix 158-MG2001, Fel-Pro 375-1252-3
- Head Gasket
- 4.540 in. Bore - Fel-Pro 375-1017, Cometic 245-C5433
- 4.600 in. Bore - Fel-Pro 375-1057, Cometic 245-C5434
- Exhaust Gasket: Fel-Pro 375-1411, Cometic 245-C5429
- Head Bolts: ARP 070-135-3606 or Manley 660-42192 Bolts & 660-42102 Washers
- Head Studs: ARP 070-235-4702 (12-point)
- Spark Plug Specs: 14 mm Thread, .750 in. (3/4) Reach, Gasket Seat
- Racing gas start with NGK 739-R5671A-9
- Alcohol start with NGK 739-R5671A-10
- Angle Milling: .0066 in. per cc
- Flat Milling: .0050 in. per cc
- Pushrod Slots: Standard
- Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
- Stud Girdle: Standard, Brodix 158-1230
- Rocker Arms: Standard
- Lifters: Standard
- Pistons: 2 Degree Valve Rolled Piston
- Exhaust Pattern: Raised .600 in.
- Spring Pockets: May not be cut any larger or deeper than 1.625 in.
- Recommended Intake Manifold: Brodix BM 2017* (158-BM2017), BM 2027* (158-BM2027) - *Note: Oval Port Intake Manifold Must Be Port Matched to Fit Rectangular Port Heads
Flow (CFM @ 28 in. H20)
- Intake (Lift in. - CFM Flow)
- 0.200 - 163
- 0.300 - 237
- 0.400 - 307
- 0.500 - 361
- 0.600 - 401
- 0.700 - 406
- 0.800 - 401
- Exhaust (Inches of Lift - CFM Flow)
- 0.200 - 128
- 0.300 - 173
- 0.400 - 215
- 0.500 - 247
- 0.600 - 270
- 0.700 - 280
- 0.800 - 283
Specifications:
Max lift for valve springs? Thanks
Motor Vehicles
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Tools:
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Electrical Cords
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