CO-244631 - COMP CAM HYDRAULIC CCH304A FITS HOLDEN 253-304-308 V8 1969-87
CO-244631
 
Part Number: CO244631 Grind Number:  
Engine Identification:    
Start Yr. End Yr. Make Cyl Description
1969 1987 Holden 8 Rough idle, strong power in mid range and top end -6500RPM. Needs 10-10.5:1 comp, 3.5-3.9 gear, hi-stall converter, modified heads etc. for serious use.
Engine Size Configuration  
253-304-308cu. In. V  
Valve Setting: Intake - .000 Exhaust - .000 Hot/Cold - HOT
Lift: Intake @Cam 325 @Valve 520 All Lifts are based
on zero lash and theoretical rocker arm ratios.
  Exhaust @ Cam 325 @Valve 520
Rocker Arm Ratio 1.60    
Cam Timing: TAPPET .0040
Lift:   Opens Closes ADV Duration
  Intake 38.0 BTDC 78.0 ABDC 296.0
  Exhaust 78.0 BBDC 38.0 ATDC 296.0
Spring Requirements:
Part Number 99838
Loads Closed 112 LBS @ 1.650 or 1 21/32
  Open 313 LBS @ 1.150    
Recommended RPM range with matching components
Minimum RPM 3000
Maximum RPM 6500
Valve Float 7100
Cam Timing: TAPPET  @.050
Lift:   Opens Closes Max Lift Duration
  Intake 10.0 BTDC 46.0 ABDC 108 236.0
  Exhaust 50.0 BBDC 6.0 ATDC 112 236.0