Blown timing - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 12-23-2005, 05:15 PM   #11
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There may not be a direct comparison between the Series 1 and Series 2. John has a chipped Series 1, as do I. Just thought I'd throw that out there.

My Jet may not be 'universal'. It was not a production chip.
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Old 12-28-2005, 03:45 PM   #12
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For a series II L67 15 degrees at WOT is stock max timing. 24 degrees makes the most power but 22 is what we run in all our cars. At 24 head gaskets tend to blow out a lot.

Obviously you can only get that timing if you have some mods as most stock L67'* have a few degrees of KR as is.
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Old 12-28-2005, 04:41 PM   #13
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Anyone else with Jet chips have higher timing? I'm sure they added a few degrees of timing but 20 seems really high.
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