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Valve Spring Technical
 

 
 Valve Spring Technical
 

STREET PERFORMER HEAD LATE (SINGLE SPRING)

  INTAKE EXHAUST ROCKER RATIO
SPRING HEIGHT 1.600 to 1.630 1.600 to 1.630 1.45
TIP HEIGHT 1.870 1.860  
SEAT PRESSURE 70-75 PSI 70-75 PSI  
GUIDES HONE TO .002 CLEARANCE    
SHIM Varies .030 to .060    
CAM EFI Pro & Street Preformer list 440int. 440 exh. 230 @ 0.050 Duration
       

PRO HEAD (DOUBLE SPRING)

       
  INTAKE EXHAUST ROCKER RATIO
SPRING HEIGHT 1.620 to 1.630 1.620 to 1.630 1.45
TIP HEIGHT 1.915 1.915  
SEAT PRESSURE 100 PSI 100 PSI  
GUIDES HONE TO .002 CLEARANCE    
SHIM Varies .015 to .060    
CAM PRO SERIES CAM    
       

Tip Height

INTAKE EXHAUST  
Stg.2 1.870 1.860  
Stg.3 1.870 1.860  
Stg.5 1.915 1.915  
       
 

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