Dragon Slayer Series Cylinder Heads/23°

 
DS 225™
• “As Cast” 225 cc Intake Port
• 2.080 / 1.600 Valve Sizes
• CNC Ported Chambers
• Uses Standard Rockers and Components
• Best “As Cast” Head in its League
• 23° Small Block Chevy Component

 



 


Economical out-of-the-box horsepower is what comes to mind with this new series of Dragon Slayer heads from BRODIX. The new Dragon Slayer 225 comes standard with CNC ported 68 cc combustion chambers allowing this port to flow over 300 cfm @ .600 cam lift. The best thing about this head is that all standard components such as rockers, lifters, and intake manifold may be used.

Package Heads

Facts and Related Components

• PS CB:
Valve Bowls Blended

• PS MI:
Match Intake Port to FP 1206

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.080 X 4.965 o.a.l. – BR 81019

• Exhaust Valves:
1.600 X 4.965 o.a.l. – BR 81021

• Valve Springs:
1.550 Flat Tappet Valve Spring – BT 120121,
150 lb Closed, 365 lb Open, 1.950
Installed Height, .600 Maximum Lift
1.550 Roller Valve Spring – GA 1000, 240 lb
Closed, 550 lb Open, 1.950 Installed Height,
.700 Maximum Lift

• Retainers:
1.550 10° Steel – CC 752

• Valve Locks:
10° Jumbo – CC 611

• Rocker Studs:
7/16 – BR 716L, AR RRS-4I

• Guide Plates:
5/16 – CC 4808

• Valve Seals:
11/32 – US VS529V

 

• Torque Heads:
70 ft-lb

• Torque Rocker Studs:
40-45 ft-lb

• Intake Gaskets:
FEL-PRO 1206, COMETIC C5414

• Head Gaskets:
350 – FEL-PRO 1003, COMETIC C5399
400 – FEL-PRO 1004, COMETIC C5403

• Exhaust Gaskets:
FEL-PRO 1406, COMETIC C5415

• Head Bolts:
ARP 134-3601, MANLEY 42313

• Head Bolt Washers:
MANLEY 42102

• Head Studs:
ARP 234-4301(12 pt)

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
NGK R5671A-9 For Alchohol
NGK R5671A-8 For Racing Gas

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

• Valve Angle:
23°

• Angle Milling:
.0078 in PER cc

• Flat Milling:
.0060 in PER cc

• Angle Machining:
Not Available

• Dowel Shift:
Not Available

• Pushrod Slots:
Standard

• Stud Girdle:
BR 6435

• Rocker Arms:
Standard
T&D ECONOMY OR JESEL SHAFT SYSTEM –
T&D 2256, JESEL KPS 01001

• Lifters:
Standard

• Valve Centerline:
Standard

• Intake Manifold:
BM 1000 / HV 1000 / HV 1002 / SE 100 / SE 102

Flow Chart cfm @ 28″ H20

Part Number Valve Size
0.200
0.300
0.400
0.500
0.600
0.650 0.700
DS 225
2.080 Intake 142 212 260 287 302 302 304
1.600 Exhaust 115 154 183 199 204 207 210

Basic Easy Order Numbers

Part# Easy
Order #
Port
Vol.
Cham.
Vol.
Int/Ext
Valve
Spring Seat
Pressure
Spring
Diam.
Ret.
ST/TI
Per
DS 225 Bare
1320000 225 68         2
DS 225 Pkg
1321000 225 68 2.080 / 1.600 140 1.550 ST 2
DS 225 Pkg
1321001 225 68 2.080 / 1.600 240 1.550 ST 2
DS 225 Pkg
1321002 225 64 2.080 / 1.600 140 1.550 ST 2
DS 225 Pkg
1321003 225 64 2.080 / 1.600 240 1.550 ST 2
DS 225 400 Combo
9991024 225 68 2.080 / 1.600 240 1.550 ST 1