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Vortec engine cam question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by mattman, Aug 14, 2001.

  1. mattman

    mattman 1/2 ton status

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    Does anybody know if anyone makes an emmissions legal roller cam for the Vortec engines kinda along the same lines as the Compucams for the TBI engines? Thinking of using a Vortec engine with my TBI but would like a little boost as I like the idea of a roller cam. Also, does anybody know if a roller fulcrum rocker will work on a Vortec head?

    90 GMC Jimmy, 350 TBI, 700R4, 32's, D.O.D.
    84 Bronco II 210,000 smoking and going.........
     
  2. solowookie

    solowookie 1/2 ton status

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    yea, Crane Cam's compucam (now renamed power max, but when I got mine it had compucam right on the box) part # 114122 (summit racing part # CRN-114122)...

    if you look at the spec the lobe sep. looks wrong for a computer cam, but the compensate with lift durations etc. Look this thing up under summit's web page!

    I actually got directed to this cam by the company that custom burnt my chip (fastchip.com), and I was concerned about the lobe so I called crane about it...

    however, you gotta advance 5 deg. when using this for a truck application.

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  3. mattman

    mattman 1/2 ton status

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    Is this actually a roller cam or a flat tappet cam like what is in a TBI motor?

    90 GMC Jimmy, 350 TBI, 700R4, 32's, D.O.D.
    84 Bronco II 210,000 smoking and going.........
     
  4. solowookie

    solowookie 1/2 ton status

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    this is a hydralic cam... unless you are going with vortec heads the factory rockers etc. will work (and this cam comes with lifter for $134)

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  5. xnoahx

    xnoahx 1/2 ton status

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    Crane and comp cams both make roller rockers that will fit on the vortec heads. There may be other companies that make them that are less expensive. All they need is a narrower body to clear the center bolt valve covers and a self aligning tip.

    Check out my 73 K5 <a target="_blank" href=http://members.theglobe.com/xnoahx/73k5.htm>http://members.theglobe.com/xnoahx/73k5.htm</a>
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Roller rockers will work on a Vortec head no problem. There are now narrow body roller rockers, with the self aligning tip. As well, you can make any roller rocker work as long as you grind out the reinforcement for the center bolts on the stock valve covers. Thats the only problem trying to run roller rockers on the Vortec heads.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     

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