AFR Cylinder Heads

Custom Piston Worksheet & Order Form (pdf)

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AFR Cylinder Heads_Bullitt_Ford Big Block_14°_280cc_Street Head_85cc_Assembled_Solid Roller_Stock Exhaust Height

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Price $2,665.00

Product Code: AFR-3806

Description

Technical Specs

AFR 280cc heads feature partially CNC ported intake, exhaust and combustion chambers, A356 aluminum castings and high quality components throughout and maintain standard exhaust port locations. Recommended for street, towing, or street/strip engines with displacements up to 477 cubic inches, operating up to 6200 RPM. Component upgrades and machining options are available to customize AFR heads to your specific build. AFR heads are available bare (without parts), call our tech line for details. Please note that due to the AFR Bullitt valve angle and location, custom pistons or notching your existing pistons will be required.

280cc CNC Ported Intake Runners
Stock Exhaust Runner Height
Stud Mounted Rocker Arms
A356 Aluminum
11/32 Bronze Valve guides
5 angle valve job
Precision CNC machining
Multiple spring options

Assembled heads feature:

11/32 Bead Lock Valves
PAC Racing Valve Springs
7/16 ARP Rocker Studs
Adjustable guide plates

www.P65Warnings.ca.gov

Description
Item Code	AFR-3806
Vendor	Air Flow Research
Product Type	Cylinder Heads
Product Model	Street Head
Engine Family	Ford 385 Series
Weight	90

Included Components

Combustion Chamber	50% CNC Ported
Intake Ports	80% CNC Ported
Exhaust Ports	80% CNC Ported
Valve Job	Competition 5 Angle
Intake Valves	11/32 Bead Lock Intake Valve - 2.250 x 5.245 Overall Length
Exhaust Valves	11/32 Bead Lock Intake Valve - 1.760 x 5.050 Overall Length
Valve Springs	PAC Racing Spring - 1.550 OD - Solid Roller Dual Valve Spring - 220 lbs on seat - .680 maximum lift - 7200 to 7400 Max RPM
Retainers	10° Manley Chrome Moly - 1.245 OD x .885 ID x .655 ID
Keepers	10° Bead Lock
Rocker Studs	7/16 ARP
Guide Plates	3/8 Adjustable
Valve Seals	11/32 Viton Seals
Spring Seat Cups	1.550 OD x .780 ID - Hardened
Intake Valve Seat	Ductile Iron - 2.450 OD x 1.950 ID x .375 Deep
Exhaust Valve Seat	Ductile Iron - 1.900 OD x 1.400 ID x .375 Deep
Valve Guides	11/32 Bronze - .502 OD x 2.250 Overall Length

Recommended Components

Intake Gasket	AFR 6893
Note	Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.
Exhaust Gasket	FelPro 1420
Head Gasket	4.500 bore - Fel-Pro 1018
Head Bolts	ARP 155-3603
Head Studs	ARP 155-4203
Head Bolt Washers	Manley
Stud Girdle	AFR 6207
Intake Manifold	Performer or Performer RPM
Spark Plug Starting Range	Autolite 3924

Specifications and Features

Material	A356 Aluminum
Intake Port Volume	280cc
Intake Port Dimension	2.230 Height x 1.815 Width - .525 Radius
Intake Port Location	Stock
Exhaust Port Volume	132cc
Exhaust Port Dimension	1.830 Height x 1.600 Width
Exhaust Port Location	Stock
Combustion Chamber Volume	85cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	Angle - 14° Intake x 8° Exhaust _ Cant - 4.01 Intake x 4.12 Exhaust
Valve Spring Pocket Diameter	1.750 OD
Max Valve Spring Pocket Machining	1.750 OD
Deck Thickness	.750
Minimum Bore Diameter	4.360
Flat Mill
Angle Mill
Minimum Cross Sectional Area	3.225 sq in
Spark Plug Dimensions	14mm x .750 w/Gasket Seat
CARB EO Number
Head bolt Diameter	1/2"

Flow Chart

Flow Data: cfm @ 28 inches of Water

Lift	.200	.300	.400	.500	.600
Intake	169	244	309	354	385
Exhaust	130	174	214	238	254

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