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Technical Roller Cam ID Help

Discussion in 'The Hokey Ass Message Board' started by seb fontana, Jun 12, 2022.

  1. seb fontana
    Joined: Sep 1, 2005
    Posts: 8,495

    seb fontana
    Member
    from ct

    A friend has a hyd roller cam he would like to id to use in a 350 chev build. HR 276 25 12, supposed to be a hyd roller which I figure the HR is for but can any one help with the rest?
     
  2. AccurateMike
    Joined: Sep 14, 2020
    Posts: 641

    AccurateMike
    Member

    Advertised Duration
    276 INT./284 EXH.

    Basic Operating RPM Range
    2,000-5,500

    Cam Style
    HYDRAULIC ROLLER TAPPET

    Duration at 050 inch Lift
    214 INT./222 EXH.

    Exhaust Duration at 050 inch Lift
    222

    Exhaust Valve Lash
    0.000 IN.

    Exhaust Valve Lift with Factory Rocker Arm Ratio
    0.509 IN.

    Grind Number
    HR-276-2S-12 IG

    Intake Duration at 050 inch Lift
    214

    Intake Valve Lash
    0.000 IN.

    Intake Valve Lift with Factory Rocker Arm Ratio
    0.488 IN.

    Lobe Separation (degrees)
    112

    Notes
    REQUIRES CAM BUTTON SPACER. ALUMINUM-BRONZE DISTRIBUTOR DRIVE GEAR NOT REQUIRED.

    Quantity
    SOLD INDIVIDUALLY.

    Valve Lift with Factory Rocker Arm Ratio
    0.488 INT./0.509 EXH. LIFT

    https://autoplicity.com/423494-crane-cams-hr-276-2s-12-ig-cam

    Looks like the "5" is an "S" Mike
     
    brando1956 likes this.
  3. seb fontana
    Joined: Sep 1, 2005
    Posts: 8,495

    seb fontana
    Member
    from ct

    Winner!! Excellent, thank you.
     
    AccurateMike likes this.

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