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Chev Heads

 

SBC CNC PORTED 23 DEGREE

COMPETITION PORTED 222CC CYLINDER HEADS

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.080"
Exhaust Valve Diameter: 1.600"
Intake Port Volume: 222cc
Exhaust Port Volume: 84cc
Chambers CNC Machined Yes
Chamber Volume: 63-69cc
Spark Plugs Angled
Minimum Intake CSA x.xxx"
Maximum Intake CSA x.xxx"
Minimum Exhaust CSA x.xxx"
Maximum Exhaust CSA x.xxx"
Intake Seat Angle 45
Exhaust Seat Angle 45
Flow Test Bore Size 4.155"
Exhaust Flow figures with pipe          NO
Intake Gaskets To Use Felpro 1207

 

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O 76 141.2 201.2 255.7 292.9 301.5 311.3 311.3 315.6 315.6
Exhaust Flow @28" H2O 52.7 107 149.2 179.4 204.4 218.3 224.2 228.3 228.6 230.4

Flow figures are not inflated for sales purposes.

Calibration is performed on both Intake & Exhaust side of bench from 50 to 450 cfm using 11 sharp edge orifice plates.

Flow bench numbers should not be the primary concern when purchasing your next set of cylinder heads.

Porting for Power ! NOT Flow Bench Numbers - Click Here for more info

 

RECOMMENDED USE AND INFO:

 

Suitable for 400 + cubed engines

 
These heads produce 529 Ftlbs & 620HP on 406 cubes at just 6700 RPM on PULP98 Fuel.
CLICK HERE for complete DYNO Proven top end kit

 

Offset Rockers are not required to produce these power levels

 

This 5 Axis CNC porting program can also be cut into the Dart 23 degree series of cylinder heads.

 

Description Pavtek Part # Price  
5 AXIS CNC PORTING ONLY:    

5 Axis CNC Competition Porting - Chambers/ Intake/ Exhaust -

Does not include cleaning, crack testing, valve guides, milling etc.

CNC400S401 Call
     
Assembled Cylinder Heads -
H400S401S $ 2595

Consists of :

  Outright
Valves - New Stainless Steel Intake & Exhaust  - Ferrea    
Springs - Dual HP ( EITHER ISKY OR CRANE )    
Retainers - New HP chrome moly retainers    
Valve spring locaters    
Valve Locks - Comp Cams Chrome Moly    
Valve Stem seals - Crane teflon    
5 Axis CNC Competition Porting - Chambers/ Intake/ Exhaust    
Multiangle Valve Seat Geometry    
Backcut valves    
Valve guides clearance checked & honed if required    
Surface milled to your desired CC's ( 63 to 69 CC's )    
Springs measured & setup to suit cam to be used    
Final washed and assembled