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Old 05-15-2003, 01:05 PM
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Post valve spring installed height?

I am setting up a set of 882 chevy 400 heads with Manley budget performance valves. i am trying to put the valve springs on but do not know how to check my installed height. I have the micrometer on with the retainers and locks but dont understand the numbers it doesnt seem like a normal micromter heres the pic. my installed height is supposed to be 1.7"

how accurate does the height need to be? can it be 1.75"?


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Old 05-15-2003, 04:26 PM
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Now that i look at that again it looks like the mic says 1.70
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Old 05-15-2003, 04:30 PM
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Right on the money. + or - 0.005" is fine.

[ May 15, 2003: Message edited by: 4 Jaw Chuck ]</p>
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Old 05-15-2003, 10:32 PM
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Looks like .970 to me
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Old 05-16-2003, 03:47 PM
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most height mikes measure from the top edge to the bottom of the spring pocket, you have your retainer setting on the inner step, it should be on the top of the mike, this is common with a stock small block retainer, I usually use a spring shim (.030)for a ford, place it on top of the mike, then do your assembly, measure your spring height and remember to compensate for the shim.your assembly as shown in the picture is about .150-.170 different than the mike reading, because of the step.
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Old 05-16-2003, 04:36 PM
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ok, ill try that, thanks.

[ May 16, 2003: Message edited by: Kramer ]</p>
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