ST 5.0 Series/20°

 

The BRODIX ST 5.0 cylinder head was developed to fit the Ford Windsor engine.

Out of the box, completely assembled ST 5.0 heads produce a 50 horsepower increase over other stock heads, and the combustion chambers may be milled into the mid 50 cc range. All existing stock 5.0 accessories can be used in the installation of the BRODIX ST 5.0.

A modified version, the BRODIX ST 5.0 R, allows the use of 7/16 Ford roller rockers.

The exhaust ports are raised .500 higher than stock Windsor heads on both versions. The BP CNC ported ST 5.0 R outflows all other heads in its class.

Package Heads

Facts and Related Components

• PS CB:
Valve Bowls Blended• PS MI:
Match Intake Port to FP 1250

• PS Valve Job:
Competition Valve Job

• Intake Valves:
1.940 x 4.920 o.a.l. – BR 60194D
2.020 x 4.920 o.a.l. – BR 6170DI

• Exhaust Valves:
1.600 x 4.940 o.a.l. – BR 6169DI

• Valve Springs:
1.470 Hydraulic Roller Valve Spring –
CC 987, 125 lb Closed, 325 lb open,
1.900 Installed Height
.575 Maximum Lift

• Retainers:
1.430 7° Steel – CC 743

• Valve Locks:
7° – PI PF-555

• Rocker Studs:
7/16 – BR 716L, AR RRS-4I (ST 5.0 R)

• Guide Plates:
5/16 – BR 289351 (ST 5.0 R)

• Valve Seals:
11/32 – US VS529V

• Torque Heads:
100 ft-lb with 1/2″ Studs
70 ft-lb with 7/16″ Studs• Torque Rocker Stands:
30 ft-lb (ST 5.0)

• Torque Rocker Studs:
40-45 ft-lb (ST 5.0 R, PB ST 5.0 R)

• Intake Gaskets:
FEL-PRO 1250

• Head Gaskets:
FEL-PRO 1011-1 or
FEL-PRO 1011-2

• Head Studs:
ARP 154-4005 for 289-302,
ARP 154-4203 for 351

• Head Bolts:
ARP 154-3605 for 289-302;
ARP 154-3603 for 351

• Exhaust Gaskets:
FEL-PRO 1487, BRODIX MG 1350

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
CHAMPION C63CX or AUTOLITE 3922

• Spring Pockets:
May Not be Cut Any Larger or
Deeper Than 1.550

• Valve Angle:
20°

• Angle Milling:
Not Available

• Flat Milling:
.0060 in Per cc

• Pushrods:
Stock Length 6.250; May require
Special Length If Heads Are Milled

• Rocker Arms:
Ford Stock 5.0 Standard Non-Adjustable Rockers
(MOTORSPORTS Part # M6564-B351) for ST 5.0
Any Ford Roller Rockers with
7/16″ Rocker Studs for ST 5.0 R

• Stud Girdle:
53/119 – BR 6430

• Air Tube:
Stock Air Tube can be Used with Minor Modifications

• Valve Centerline:
53/119

• Intake Manifold:
Small Block Ford

Flow Chart cfm @ 28″ H20

Part Number Valve Size
0.200
0.300
0.400
0.500
0.600
0.700
ST 5.0 1.940 Intake 130 186 225 237 241  
1.600 Exhaust 100 132 156 172 184  
ST 5.0 R 1.940 Intake 130 186 225 237 241  
1.600 Exhaust 100 132 156 172 184  
BP ST 5.0 R
(CNC Ported)
2.020 Intake 145 208 245 272 277 281
1.600 Exhaust 119 150 179 198 209 216

Basic Easy Order Numbers

Part# Easy
Order #
Port
Vol.
Cham.
Vol.
Int/Ext
Valve
Spring Seat
Pressure
Spring
Diam.
Ret.
ST/TI
Per
ST 5.0 Bare
1050000 171 60         2
**ST 5.0 Pkg**
1051000 171 60 1.940 / 1.600 125 1.470 ST 2
ST 5.0 Pkg
1051001 171 60 2.020 / 1.600 125 1.470 ST 2
ST 5.0 Pkg
1051002 171 55 1.940 / 1.600 125 1.470 ST 2
ST 5.0 Pkg
1051003 171 55 2.020 / 1.600 125 1.470 ST 2
ST 5.0 Special
1059000 Custom Order           2
ST 5.0 R Bare
1050001 171 60         2
**ST 5.0 R Pkg**
1051004 171 60 1.940 / 1.600 125 1.470 ST 2
ST 5.0 R Pkg
1051005 171 60 2.020 / 1.600 125 1.470 ST 2
ST 5.0 R Pkg
1051006 171 55 1.940 / 1.600 125 1.470 ST 2
ST 5.0 R Pkg
1051007 171 55 2.020 / 1.600 125 1.470 ST 2
ST 5.0 R Special
1059001 Custom Order           2
BP ST 5.0 R Bare
1058000 185 66         2
**BP ST 5.0 R Pkg**
1058100 185 66 2.020 / 1.600 125 1.470 TI 2
BP ST 5.0 R Pkg
1058101 185 60 2.020 / 1.600 125 1.470 TI 2
BP ST 5.0 R Special
1059002 Custom Order           2