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Isky vs SBC lifter 120-130

posted by  md122s on  Tue Dec 29 13:57 CST 2009
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last visit: Fri Sep 27 09:51 CST 2013
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In the process of building my b20 which had an Isky vv71 cam and lifters with the longer push rods but ,the new sbc lifters I got from Isky, the pushrod cup is .110 higher inside the lifter than the originals, has anyone run into this. I think this was an old rebuild done in the early 70's because this cam had a 1971 date code according to Isky








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    Isky vs SBC lifter 120-130

    posted by  122power on  Wed Dec 30 18:21 CST 2009
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    last visit: Thu Dec 12 00:33 CST 2013
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    Yes I would get both cam and lifters new. The only thing you have to worry about is the set screw on the rocker arm, as long as that has enough travel you will be ok. I put the v71 (combination) cam in and made the set screw go pretty much all the way down, compared to being mostly unscrewed or protruding out of the top part area. What I mean is more threads were showing at the top side stock, compared to having the isky cam in, then the threads were mostly out the bottom.








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    Isky vs SBC lifter 120-130

    posted by  walrus3 on  Tue Dec 29 23:34 CST 2009
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    last visit: Mon Dec 2 14:20 CST 2013
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    If it were mine, as long as the old lifters were good (and mated to the cam lobes)
    I would have used them, rather than replacing them.
    If the lifters were going bad, the cam may be on its way out also.
    If your new lifters are the same height as OEM, you could use OEM pushrods but 0.110" doesn't
    seem like enough difference.
    --
    George Downs, Bartlesville, Heart of the USA!








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      Isky vs SBC lifter 120-130

      posted by  md122s on  Wed Dec 30 08:17 CST 2009
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      last visit: Fri Sep 27 09:51 CST 2013
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      Im a actually using a new Isky cam, diff grind, I guess Ill see when I start assembly and check for adjustment and proper geometry.








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        Isky vs SBC lifter 120-130

        posted by  walrus3 on  Wed Dec 30 10:21 CST 2009
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        last visit: Mon Dec 2 14:20 CST 2013
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        You're right. Should always use new lifters with a new cam.
        I learned that one the hard way!
        --
        George Downs, Bartlesville, Heart of the USA!







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