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Sonic testing LS blocks results

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Old 12-20-2010, 11:17 PM
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Default Sonic testing LS blocks results

Been playing with a new sonic tester we have here

checked a couple matters of interest

6.0 block bored 4.030" shows .220" on the thrust, it gets down to .180" at 3 o'clock position.

6.0 iron block bored 4.080" shows .200" on thrust, minimum .140"

LSX block bored 4.155" minimum I saw was .250"

241 cylinder head deck thickness, .360"

Dart 225 head deck .484"

I checked an LS3 block, dunno if I'm getting a good reading on aluminum block, I think its picking up the sleeve and the aluminum behind it. At 4.070" in various spots would show .120"

Checked an LS2 block bored 4.030" showed a minimum of .120"
Old 12-22-2010, 03:07 PM
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This block thrust; is it a matter of deflection you are speaking of on the trust bearing cap? I guess a few of us who are unfamiliar need to know what those numbers correlate to
Old 12-22-2010, 03:15 PM
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Any chance you can get your hands on a set of LS9, LS7, and L92 heads? The "rumor" is the L92's deck thickness is thin compared to even a 317 head.



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