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The AK series is the latest in sprint car technology. This head offers new features such as: a 13° valve angle, a relocated spark plug and down nozzle location, and an 80 / 135 valve spacing. The BP AK head is offered in two intake port sizes, 270 cc and 285 cc. Special components required for these heads are injectors, sheet metal valve covers, and a shaft rocker system.
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Intake Port
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Chamber Volume
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Valve Sizes Intake/ Exhaust
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Exhaust Pattern
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Valve Centerline
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Intake Manifold
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BP AK 270
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270 cc
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52 cc
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2.180/1.600
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Spread Port
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80/135
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Fuel Injection
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BP AK 285
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285 cc
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52 cc
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2.180/1.600
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Spread Port
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80/135
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Fuel Injection
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Cubic Inch
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Compression
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Camshaft
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RPM
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Application
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BP AK 270
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380 - 410
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13.5 Minimum
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Roller
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4500-8500
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Oval Track/
Drag Race
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BP AK 285
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380 - 410
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13.5 Minimum
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Roller
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4500-8500
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Oval Track/
Drag Race
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Valve Size
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0.200
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0.300
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0.400
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0.500
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0.600
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0.650
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0.700
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BP AK 270
(CNC Ported)
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2.180 Intake
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154
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236
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298
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333
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361
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373
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376
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1.600 Exhaust
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110
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161
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213
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238
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248
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256
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258
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BP AK 285
(CNC Ported)
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2.180 Intake
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157
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239
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298
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339
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369
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378
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382
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1.600 Exhaust
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110
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161
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213
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238
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248
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256
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258
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• PS CB:
Valve Bowls Blended
• PS MI:
O-Ringed
(1.435 x 2.100))
• PS Valve Job:
Competition Valve Job
• Intake Valves:
2.180 x 5.950 x 5/16
• Exhaust Valves:
1.600 x 5.950 x 5/16
• Valve Springs:
1.550 Roller Valve Spring - GA 1000,
240 lb Closed, 550 lb Open,
1.950 Installed Height,
.700 Maximum Lift
• Retainers:
1.550 10° Titanium - MA 2398BR
• Valve Locks:
5/16 - CC 610
• Valve Seals:
5/16 - CC 500
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• Torque Heads:
70 ft-lb
• Torque Rocker Studs:
40-45 ft-lb
• Intake Gaskets:
O-Ringed
• Head Gaskets:
350 - FEL-PRO 1003, COMETIC C 5399
400 - FEL-PRO 1004, COMETIC C 5403
• Exhaust Gaskets:
Spread Port - BRODIX MG 52464
(Trim to Fit), COMETIC C5424
• Head Studs:
Available Eclusively From BRODIX-
BRODIX BR HSAP (Aluminum Block)
• Accessory Bolt Holes Are Drilled
• Spark Plug Starting Points:
NGK R5671A-10
for Alcohol
NGK R5671A-9
for Racing Gas
• Spring Pockets:
1.550 Out of the Box, May be Cut to 1.625 -
No Larger or Deeper
• Valve Angle:
13°
• Angle Milling:
Not Available
• Flat Milling:
.0060 in Per cc
• Angle Machining:
Not Available
• Pushrods:
Special Length
• Rocker Arms:
Shaft System - T&D 2341,
JESEL KPS 20592
• Lifters:
.180 Offset
• Pistons:
Special 13°
• Intake Face Angle:
5°
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AK 270 Bare
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Spread Port Exhaust
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1310000
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BP AK 270 Bare
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Spread Port Exhaust
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1318000
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BP AK 270 L Bare
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Spread Port Exhaust
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1318001
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BP AK 270 Pkg
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Spread Port Exhaust
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1318100
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BP AK 270 L Pkg
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Spread Port Exhaust
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1318101
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BP AK 285 Bare
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Spread Port Exhaust
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1318002
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BP AK 285 Pkg
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Spread Port Exhaust
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1318102
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Phone: (479) 394-1075 • Fax: (479) 394-1996 • 301 Maple • P.O. Box 1347 • Mena, Arkansas 71953
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| Not legal for sale or use on pollution controlled motor vehicles. |
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© copyright 2010 by Brodix, Inc.
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