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Chev Heads

 

SBC RACERPRO RAISED RUNNER 23 DEGREE

COMPETITION CNC PORTED CYLINDER HEADS

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.100"
Exhaust Valve Diameter: 1.625"
Intake Port Volume: 261cc
Exhaust Port Volume: 86cc
Chambers CNC Machined Yes
Chamber Volume: 63-72cc
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

 

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O 71 144 209.5 263.5 298.5 316.5 327 335 336 NA
Exhaust Flow @28" H2O 57.5 113.5 164 197.5 217.5 229 238.5 244 246.5 NA

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:

These cylinder heads must be used with offset rockers - USE T&D part # 2216 .450" Offset
Offset roller lifters must also be used

Call for pricing.

 

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.

CNCSBCRPRR23D Call
     
Assembled Cylinder Heads -
Call $ Call

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 72 CC's )
   
Springs measured & setup to suit cam to be used    
Final washed and assembled