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Chev Heads

 

SBC RACERPRO 15 DEGREE

COMPETITION CNC PORTED CYLINDER HEADS -280CC

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.180"
Exhaust Valve Diameter: 1.625"
Intake Port Volume: 280cc
Exhaust Port Volume: 108cc
Chambers CNC Machined Yes
Chamber Volume: 45-55cc
Spark Plugs Angled
Minimum Intake CSA 3.00"
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          BOTH LISTED - PIPE USED 2"X 5.000" LONG
Intake Gaskets To Use MG143

 

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O 78.5 170.7 228 286.7 321.3 344.6 359.5 367 377 383.5
Exhaust Flow @28" H2O W/PIPE 55.8 118.9 169.5 224.4 268.8 284.3 294 300 305 307.9
Exhaust Flow @28" H2O NO/PIPE 51.72 112.4 160.2 212.2 249.3 261.3 267.8 271.9 275.2 276.8

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 # 2055 .550" Offset
Offset roller lifters must also be used - Rockers & LIfters in Stock at Pavtek

 

 

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.

CNC434S401 $ 1565
     
Assembled Cylinder Heads - Suit Solid Roller Camshaft
H434S404R $ 4995

Consists of :

  Outright
RacerPro Raw Castings    
Valves - New Stainless Steel Intake & Exhaust  - 2.180" x 1.625"
   
Springs - Pac Roller Springs ( .850" lift max)
   
Retainers - New Titanium Retainers ( Manley)
   
Valve spring locaters
   
Valve Locks - Comp Cams Chrome Moly 10 Degree
   
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 ( 45 to 55 CC's )
   
Springs measured & setup to suit cam to be used    
Final washed and assembled