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- AFR Big Block Chevy 345cc Rectangle Port Magnum Aluminum Cylinder Heads
AFR - Airflow Research 345cc Rectangle Port 24° Magnum Aluminum Cylinder Heads BB-Chevy
033-2110
AFR - Airflow Research 2110 Details
50% CNC Combustion Chamber (Bowl Blend) Package
Big Block Chevy 345cc Rectangle Port 24° Magnum Basic Package Components
50% CNC Ported Combustion Chambers
Bowl Blended Exhaust Ports
Bowl Blended Intake Ports
Competition 5-Angle Valve Job
Intake Valve, 2.300'' x 5.500'' Overall Length
Exhaust Valve, 1.880'' x 5.442'' Overall Length
1.625'' OD PAC Racing Solid Roller Valve Spring, 275 lbs. on seat, .850'' maximum lift, max RPM 7400-7600
10º Manley 4140 Chrome Moly Retainers
10º Valve Locks
7/16'' Rocker Studs
Adjustable 3/8'' Guide Plates
Viton Valve Seals
Hardened Spring Seat
Intake Valve Seats
Exhaust Valve Seats
Bronze Valve Guides
Big Block Chevy 345cc Rectangle Port 24° Magnum Head Specifications
Head Torque w/Moly Lube
75 Ft. Lbs.
Rocker Stud Torque
55 Ft. Lbs.
Intake Port Gasket, 1.775'' x 2.500'' with 1/2'' radius
Fel-Pro 375-1275 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
Exhaust Port Gasket
AFR 033-6858
Head Gasket Mark IV
4.540'' Bore, Fel Pro 375-1017
AFR 033-6850
Head Gasket Mark V - VI
Up to 4.500'' Bore, Fel Pro 375-1047
Head Gasket Mark V - VI
4.500'' to 4.600'' Bore, Fel Pro 375-17049
Head Bolts & Studs
Standard ARP
Head Bolt Washers
Manley Standard
Stud Girdle
AFR 033-6210
Suggested Manifold
Edelbrock 350-2907 & 350-2927 or Brodix 158-HV2000 & 158-HV2001
Spark Plug Starting Range
Champion C59C, Autolite 3932
Combustion Chambers
117cc Partially CNC Bowl Blend
Intake Port Volume
345cc Partially Ported
Exhaust Port Volume
N/A
Spring Pocket can be cut to 1.750, no deeper.
Valve Spacing
Standard
Rocker Arms
Standard
Valve Angle
24° / 4° Intake ; 15° / 4° Exhaust
Angle Mill, 104cc Maximum
.009'' per cc
Flat Mill, As Cast 108cc, CNC 114cc Maximum
.006'' per cc
NOTE:
Flat and Angle mills might require a .120'' thick head gasket.
Specifications:
AFR's 345cc Competition Ready Welterweight! If huge horsepower is what you are searching for, the 345 can certainly deliver. These cyilnder heads were targeted at larger cubic inch engines, 509-632ci, looking for maximum horsepower and rpm capability with a primary operating range of 3500-8000 rpm's (This range is an average and will vary with engine displacement and component selection). As well, these aluminum heads provide impressive torque figures at higher rpm levels, so higher reving 450+ cubic inches can benefit from the efficient runner. Blown, turbo, and nitrous engines will especially like the larger, higher flowing intake ports. AFR BBC 345cc cylinder heads will work best with camshafts around the .750+ gross valve lift mark to make better use of the substantial airflow found in the higher lift range. The 345cc come standard with AFR's trademark .750'' (3/4'') thick cylinder head deck, reinforced rocker stud bosses, premium one-piece stainless steel 2.300'' intake valves and 1.880'' exhaust valves. Combustion chamber volume is 117cc or 121cc and can be milled as lower if necessary. Take note the higher flowing exhaust ports and bolt pattern are raised .375'' (3/8'') over stock location, this rarely affects header or chassis fitment. . Installation Notes: Optional stud girdle required for 2° rolled valve angles and 1'' longer head bolt needed on four bottom exhaust bolt holes. Longer pushrods may also be required.
Motor Vehicles
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Tools:
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Electrical Cords
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