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Brodix SBC - BR LS Compatible Cylinder Heads


Flow Chart CFM @ 28" H2O

 

Valve Size

0.200

0.300

0.400

0.500

0.600

0.650

7.000

BR 7

2.204 Intake

150

144

294

334

360

364

 

1.614 Exhaust

113

158

188

208

216

221

 

STS BR 7
(CNC Ported)

2.204 Intake

159

240

303

343

369

376

364

1.614 Exhaust

116

169

208

224

233

235

240

STS BR 273
(CNC Ported)

2.250 Intake

147

233

286

344

381

409

416

1.614 Exhaust

116

169

208

224

233

235

240


Package Heads

• PS CB:
  Valve Bowls Blended

• PS MI:
  Match Intake Ports

• PS Valve Job:
  Competition Valve Job

• Intake Valves:
  2.204 x 5.200 o.a.l. x 8mm Stem, Bead Lock -
    BR 70204 (BR 7, STS BR 7)
  2.250 x 5.200 o.a.l. x 8mm Stem, Bead Lock -
    BR 70204 (STS BR 7 273)

• Exhaust Valves:
  1.614 x 5.230 o.a.l. x 8 mm Stem, Bead Lock -
    BR 70614

• Valve Springs:
  1.295 od Hydraulic Roller Spring - MA 221436,
    155 lb Closed, 405 lb Open,
    1.810 Installed Height,
    .600 Maximum Lift

• Retainers:
  1.290 7° Steel - MA 23621

• Valve Locks:
 7° Machined Bead Lock - MA 13098

• Rocker Studs:
  Not Available

• Valve Seals:
  8 mm - CC 500


Facts and Related Components

• Torque Heads:
  11 mm Studs - 85 ft-lb With Oil
  8 mm Studs - 26 ft-lb With Oil

• Torque Rocker Studs:
  22 ft-lb

• Intake Gaskets:
 GM 19172113, FEL-PRO 1208-3 (.060)
  -(BR 7, STS BR 7)
 GM 19172113 Trim to Fit, FEL-PRO 1208-3 Trim to Fit
  -(STS BR 7 273)

• Head Gaskets:
  GM 12582179, FEL-PRO 1185-041 (4.175 Bore)

• Exhaust Gaskets:
  FEL-PRO 1440

• Head Studs:
  ARP 234-4317

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
 14mm 3/4 Reach Seals With Washer
  NGK R5671A-7
    for Pump Gas
  NGK R5671A-8
    for Racing Gas

• Spring Pockets:
  May Not Be Cut Any Larger or Deeper Than 1.350

• Valve Angle:
  12°

• Angle Milling:
  .0060 in PER cc

•Dowel Shift:
  Standard

• Pushrod Slots:
  Standard

• Pistons:
  Standard

• Rocker Arms:
  Standard

• Lifters:
  Standard

• Pushrods:
 Measure For Proper Length


Basic Easy Order Numbers

BR 7 Bare

 

1170000

BR 7 Pkg

 

1171000

STS BR 7 Bare

 

1178000

STS BR 7 Pkg

 

1178100

STS BR 7 273 Bare

 

1178001

STS BR 7 273 Pkg

 

1178101

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