Cylinder Heads Chevy 205cc Aluminum Asmbl.

Description

Blacklabel’s Small Block Chevy 205cc, Assembled Cylinder Heads.

Angled Plug! 

 Street, Performance, Short Track, Restricted Oval up to 6500rpm 

 Aircraft grade 356A Aluminum Alloy heat treated to T-6 specifications.

 205cc Intake Runners, 64cc Combustion Chamber, Open Chambers, 

 400″ thick deck can be milled down to 54cc.

1.125″ wide x 2.230″ tall Intake openings , 

Fits All OEM Bolt Pattern Manifolds, 7 Bolt Exhaust Flange

Centerbolt and Outside Valve Cover Bolt Patterns, Square Port Exhaust

3 Angle Cut Stellite Hardened Valve Seats, Bronze Valve Guides

Spring Pocket can be cut to 1.625-no deeper! 

Uses Felpro Head Gasket Set # 1003

Heads are drilled with all OEM accessory bolt holes   

 Assembled features Include;

  Intake Valves #4304  2.020″/ +0.100/ 5.040 (11/32″ stem) 

 Exhaust Valves # 4302  1.600″/+0.100/ 5.065 (11/32″ stem)

4140 Steel Retainers 1.400 x 1.060 x 0.690

Valve Locks +.90

 Installed Spring Height-Intake 1.821 / Exhaust 1.806, Diameter 1.450″

Spring: Intake, 130lbs @ 1.820    Exhaust, 145lbs @ 1.760,  .600 Max Lift

Assembly Specifications
Max Lift: .550″
Coil Bind: .740″
Intake Install: 130lbs @ 1.8
Exhaust Install: 130lbs @ 1.8
Closed Sear Pressure: 110lbs
Open Seat Pressure: 300lbs

                                                       AVERAGE Flows:  CFM @.28″ Water (according to manufacturer)

Lift	100	200	300	400	500	600	700
INTAKE	63.0	117.1	163.1	203.5	230.3	248.2	252.0
EXHAUST	52.2	97.8	132.9	161.9	180.0	189.2	192.1