GB 2000™ Series/13.5°

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[tab title=”Description”]
The BRODIX GB Series is in a class by itself. These 13.5° valve angle heads were designed with sprint cars, late models, and drag racing in mind.
The GB 2000 series features improved spark plug angles, highly efficient combustion chambers, raised intake ports, moved valve centerlines, and a raised valve cover rail. The latest evolution of the GB head is the DR 1213 which features a 13.5° exhaust valve angle and a 12.5° intake valve angle for even greater air flow. Special components required for the GB 2000 series and DR heads are injectors or modified intake manifold, sheet metal valve covers, and a shaft rocker system.
Call one of our technicians to match a GB series head to your particular application.
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[tab title=”Details”]

Package Heads

Facts and Related Components

• PS CB:
Valve Bowls Blended

• PS MI:
Match Intake Port to BRODIX MG 2200

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.230 x 6.250 o.a.l. – BX 2230-625T, 52°
(WP DR 1213)
2.200 x 6.090 o.a.l. – BX 2200-609T
(GB 2000, GB 2200)
2.200 x 6.250 o.a.l. – BX 2200-625T
(GB 2300)
2.200 x 6.350 o.a.l. – BX 2200-635T
(GB 2400)

• Exhaust Valves:
1.580 x 6.090 o.a.l. – BR 91580
(GB 2000, GB 2200)
1.580 x 6.250 o.a.l. – BR 91582,
BX 1580-625 T 25, 45°
(WP DR 1213, GB 2300)
1.580 x 6.350 o.a.l. – BR 91535D,
BX 1580-635 T 25 (GB 2400)

• Valve Springs:
1.550 Roller Valve Spring – PAC 1941,
255 lb Closed, 610 lb Open,
1.950 Installed Height,
.700 Maximum Lift
1.550 Roller Valve Spring – IS 9985,
260 lb Closed, 600 lb Open,
1.950 Installed Height,
.800 Maximum Lift

• Retainers:
1.550 10° Titanium – MA 2398BR

• Valve Locks:
10° Jumbo – CC 611

• Rocker Studs:
Shaft System Required

• Valve Seals:
11/32 – US VS529V

• Torque Heads:
70 ft-lb

• Torque Rocker Studs:
40-45 ft-lb

• Intake Gaskets:
BRODIX MG 2200, COMETIC C5423

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

• Exhaust Gaskets:
Spread Port-
BRODIX MG 52464 (trim to fit),
COMETIC C5422

• Head Studs:
Available Exclusively From BRODIX –
BRODIX BR HSRP/GB CI BLOCK
(GB 2000)
BRODIX BR HSGB 2200 CI BLK
(GB 2200)

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
NGK R5671A-10 for Alcohol or
NGK R5671A-9 for Racing Gas

• Spring Pockets:
1.550 Out of the Box,
May Be Cut to 1.625- No Larger or Deeper

• Valve Angle:
13.5°

• Angle Milling:
Not Available

• Flat Milling:
.0060 in Per cc

• Angle Machining:
Not Available

• Pushrod Slots:
Left Bare and Uncut

• Stud Girdle:
Not Available

• Rocker Arms:
Shaft System with 85/125 Spacing – T&D 2221,
JESEL KPS 20592 (GB Series),
95/150 Spacing – T&D 22221,
JESEL KPS 411164 (WP DR 1213)
Check Heads for Intake Offset

• Lifters:
.180 Offset

• Pistons:
Special 13.5° With -12 Spark Plug Angle

• Pushrods:
Special Length

• Intake Face Angle:
BRODIX 5°

• Valve Covers:
Sheet Metal

• Valve Centerline:
95/150 (WP DR 1213)
85/125 (WP GB 2000*, WP GB 2200, WP GB 2200+30)
75/125 (WP GB 2300)
75/150 (WP GB 2400)

• Intake Manifold:
Fuel Injection (WP DR 1213, WP GB 2300, WP GB 2400)
GM # 24502653 / EDELBROCK # 2955 With BRODIX
Spacers and Valley Plate (WP GB 2000*, WP GB 2200, WP GB 2200+30)
* WP GB 2000 are available in several intake port sizes. Ask a
BRODIX representative which size would best fit your application

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[tab title=”Flow Chart”]

Flow Chart cfm @ 28″ H20

 Valve Size
0.200
0.300
0.400
0.500
0.600
0.7000.800
WP DR 1213
(CNC Ported)		2.230 Intake141221295351396421435
1.580 Exhaust105159210237252262268
WP GB 2000 – 286
(CNC Ported)		2.220 Intake157238302353381399 
1.580 Exhaust109152205232241250 
WP GB 2200 – 282
(CNC Ported)		2.200 Intake150223286336368383 
1.580 Exhaust104158210235246252 
WP GB 2200 – 282+30
(CNC Ported)		2.200 Intake150224289337371396 
1.580 Intake104158210235246252 
WP GB 2300 – 309
(CNC Ported)		2.200 Intake153231286342374394 
1.580 Exhaust100151216243250253 
WP GB 2400 – 325
(CNC Ported)		2.200 Intake
CALL FOR FLOW NUMBERS
1.580 Exhaust

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[tab title=”Easy Order Numbers & More”]

Basic Easy Order Numbers

Part#Easy
Order #		Port
Vol.		Cham.
Vol.		Int/Ext
Valve 		Spring Seat
Pressure		Spring
Diam.		Ret.
ST/TI		Per
DR 1213 Bare
116000031549    2
WP DR 1213 Bare
116800031549    2
WP DR 1213 Pkg
1168100315492.230 TI / 1.600 TI2501.560TI1
GB 2000 Bare
113000026564    2
GB 2000 Special
1139002Custom Order     2
WP GB 2000 L Bare
113800028676    2
WP GB 2000 Bare
113800128676    2
WP GB 2000 L Pkg
1138100286762.200 TI / 1.580 ST2401.550TI1
WP GB 2000 Pkg
1138101286762.200 TI / 1.580 ST2401.550TI1
WP GB 2000 L Special
1139000Custom Order     2
WP GB 2000 Special
1139001Custom Order     2
WP GB 2200 Bare
113800628269    2
WP GB 2200 L Bare
113800228269    2
WP GB 2200 Pkg
1138104292692.200 TI / 1.580 ST2401.550TI1
WP GB 2200 L Pkg
1138105292692.200 TI / 1.580 ST2401.550TI1
WP GB 2300 Bare
113800730949    2
WP GB 2300 L Bare
113800330949    2
WP GB 2300 Pkg
1138106309492.200 TI / 1.580 ST2401.550TI1
WP GB 2300 L Pkg
1138107309492.200 TI / 1.580 ST2401.550TI1
WP GB 2400 Bare
113800432553    2
WP GB 2400 L Bare
113800532553    2
WP GB 2400 Pkg
1138102325532.200 TI / 1.580 ST2401.550TI1
WP GP 2400 L Pkg
1138103325532.200 TI / 1.580 ST2401.550TI1

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[tab title=”Instruction Sheet”]smallblockheadinstructions
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