Speedmaster Master Edition One | Page 90

BIG BLOCK FORD PERFORMANCE ALUMINUM CYLINDER HEADS

Speedmaster performance aluminum cylinder heads are also available for the Big Block Ford enthusiasts. With bigger displacement engines becoming more common, the need for more airflow is necessary. If you are looking to build a 400-700 horsepower engine then you should consider Speedmaster Aluminum cylinder heads. Like the rest of our performance heads we use our“ Gravity Die Cast” process. This casting process creates a much more uniform and robust cylinder head. They also offer a smaller cross section to increase the incoming air’ s velocity resulting in improved drivability, power and economy. We have them available in as cast for the mild street applications and in Fully CNC machined for the serious enthusiast. Speedmaster CNC ported cylinder heads are machined on a dedicated 5 axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion chamber, exhaust and intake ports are fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area. CNC ported heads eliminate human error and variation from port to port.
Finished PN #’ s
SM3051 SM3051VJ SM3058 SM3058VJ
Valve Angle
STOCK STOCK STOCK STOCK
Valve Sizes
2.08”/ 1.71” 2.19”/ 1.71” 2.08”/ 1.71” 2.19”/ 1.76”
Int. Vol.
275cc. 275cc. 300cc. 300cc.
Chamber Volume
95cc. 95cc. 98cc. 98cc.
Comp. valvejob
No Yes No Yes
Port Finish
As Cast As Cast CNC CNC
Chamber Finish
As Cast As Cast CNC CNC
Flow Results Speedmaster # SM3051 These Flow Numbers are as Cast Intake Valve- 2.190” Exhaust Valve- 1.710”
LIFT INTAKE EXHAUST
0.100
65.5
50.0
0.200
107.0
85.0
0.300
162.0
122.0
0.400
208.0
145.0
0.500
245.0
160.0
0.600
267.0
167.0
0.700
295.0
175.0
Intake Port: 275cc Exhaust Port: 90cc Combustion Chamber: 95cc
Flow Results Speedmaster # SM3058 These Flow Numbers are CNC Ported Intake Valve- 2.190” Exhaust Valve- 1.710”
LIFT INTAKE EXHAUST
0.100
72.0
60.0
0.200
152.0
110.0
0.300
219.0
145.0
0.400
280.0
180.0
0.500
331.0
204.0
0.600
344.0
225.0
0.700
350.0
240.0
Intake Port: 300cc Exhaust Port: 94cc Combustion Chamber: 98cc

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