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Old 11-13-2004, 05:55 PM
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Roller lifter design

Hey guys

The stock lifters in my 94 Z(with an LT1) have seen better days.I am currently doing an LT4 conversion on my ride and I want to replace the lifters. Here's my question. The body on the stock lifter is tapered on each side of the roller but the ones at Auto Zone and every other parts house are not. Is this an issue? Or will it be ok to run these on the Hot Cam. I would hate for them to dig into my new cam. My wife works at Auto Zone so I get a very substainal discount is why I would like to get them from there. Thanks guys.

The Wolf

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Old 11-13-2004, 11:20 PM
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I don't think it will make too much difference. With my 5.0 I just reused the stock roller lifters. When I replace them I am going to look into getting a anti-pump up, stock type lifter. Anti-pump ups make a big difference at the top end.
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Old 11-14-2004, 12:31 AM
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My lifters are far beyond reusing due to an oil pump failure, I'm just curious if the difference in design is going to make a difference in reliability.

The Wolf
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Old 11-14-2004, 12:33 AM
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You can also mail order through Autozone and get Comps and Crane parts. You get half the discount you would if its in-house parts but still better than no discount at all.
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Old 11-14-2004, 06:10 PM
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The body on the stock lifter is tapered on each side of the roller but the ones at Auto Zone and every other parts house are not. Is this an issue? Or will it be ok to run these on the Hot Cam. I would hate for them to dig into my new cam.

I'm guessing the non-taper lifters have that machineing step skipped because its not really necessary.

In a high production environment shoving the tapered lifter in the block mite be a little easy/faster and make the line run a little faster.

I think you would need ia cam profile approaching a triangle in order to have interference.
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Old 11-14-2004, 09:02 PM
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I was thinking the same thing. Thanks
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