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CHRYSLER PERFORMANCE ALUMINUM CYLINDER HEADS
All Speedmaster alloy cylinder heads are made using a superior“ gravity die” cast process. These heads are flow tested on a Superflow SF600 at 28 inches with a 1 / 2 inch radius intake plate and short stack exhaust tube.
BIG BLOCK
FINISHED PN #’ s
SM3065 SM3068 SM3068VJ
SMALL BLOCK
FINISHED PN #’ s
Valve Sizes
2.20”/ 1.81” 2.20”/ 1.81” 2.20”/ 1.81”
Valve Sizes
SM3131 1.92”/ 1.625” SM3131VJ 1.92”/ 1.625” SM3131XLVJ 2.02”/ 1.62” SM3048 2.02”/ 1.60” SM3048VJ 2.02”/ 1.60” SM3049 2.02”/ 1.60” SM3049VJ 2.02”/ 1.60”
Int. Vol.
265cc.
Int. Vol.
170cc. 170cc. 190cc. 190cc.
INTAKE / EXHAUST GASKETS
HEAD BUILD KITS
Chamber Volume
74cc. 78cc. 78cc.
Chamber Volume
65cc. 65cc. 68cc. 68cc.
4-cyl. 2.2 / 2.5: Intake / Exhaust- MS90947
Chrysler 400: Intake- Fel Pro 1216 Exhaust- Fel Pro 1414( May need a small amount of trimming) Exhaust- SM3275 or Felpro 1413
Comp. valvejob
No No Yes
Comp. valvejob
No Yes Yes No Yes No Yes
Chrysler 318- 360:
Chrysler 318- 360:
Port Finish
As Cast CNC CNC
Port Finish
As Cast As Cast As Cast As Cast As Cast CNC CNC
Chamber Finish
As Cast CNC CNC
Chamber Finish
As Cast As Cast As Cast As Cast As Cast CNC CNC
( PC3131) Cast Iron Intake- Mopar # 4876049 Exhaust- Mopar # MS95480( PC3048) Aluminum Intake- SM3292 or FelPro 1213
Speedmaster offers most of our heads as bare castings, or professionally assembled. When we assemble heads, extra time is taken to set them up for YOUR application. All you have to do is choose the head casting you want and the type of cam you want the springs to work with.
Flow Results Speedmaster # SM3065 These Flow Numbers are as Cast Intake Valve- 2.200” Exhaust Valve- 1.810”
LIFT INTAKE EXHAUST
0.100 |
71.1 |
54.1 |
0.200 |
146.2 |
103.9 |
0.300 |
207.9 |
150.0 |
0.400 |
251.2 |
187.0 |
0.500 |
273.6 |
213.2 |
0.600 |
287.2 |
229.8 |
0.700 |
296.0 |
239.4 |
0.800 |
294.8 |
246.4 |
Intake Port: 265cc Combustion Chamber: 78cc
Flow Results Speedmaster # SM3068 These Flow Numbers are CNC Ported Intake Valve- 2.200” Exhaust Valve- 1.810”
LIFT INTAKE EXHAUST
0.100 |
69.3 |
57.4 |
0.200 |
147.5 |
116.8 |
0.300 |
217.8 |
159.0 |
0.400 |
278.3 |
211.8 |
0.500 |
319.7 |
241.6 |
0.600 |
343.9 |
269.0 |
0.700 |
357.2 |
287.7 |
0.800 |
364.5 |
299.8 |
Intake Port: 285cc Combustion Chamber: 72cc
The following head build kits apply to part number range: SM3065 | SM3068
HEAD BUILD KIT OPTIONS:
TYPE
HEAD BUILD KIT
CLOSED SEAT PRESSURE
OPEN SEAT PRESSURE
MAX. LIFT
Hydraulic Flat Tappet Solid Flat Tappet Hydraulic Roller Solid Roller Race Solid Roller |
HBK41 HBK42 HBK43 HBK44 HBK45 |
110 LBS 125 LBS 145 LBS 210 LBS 300 LBS |
300 LBS 320 LBS 360 LBS 450 LBS 700 LBS |
. 550”. 580”. 580”. 650”. 800” |
The following head build kits apply to part number range: SM3048 | SM3049 |
|
Hydraulic Flat Tappet
Solid Flat Tappet
Hydraulic Roller
Solid Roller
Race Solid Roller
|
HBK31 HBK32 HBK33 HBK34 HBK35 |
110 LBS 125 LBS 145 LBS 210 LBS 300 LBS |
300 LBS 320 LBS 360 LBS 450 LBS 700 LBS |
. 550”. 580”. 580”. 650”. 800”
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