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Old 01-25-2010, 05:08 PM   #1
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Im currently running autolite 104s gapped .060 could this be causing rmm codes to be set off,should i regap them, the reasoning for this question is alot run 104s,605s,and ngk iridiums for my setup what is the best in your opinions.Im just wondering if 2 stages colder which i have is to cold for it or not
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Old 01-25-2010, 07:14 PM   #2
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I personally will only use a/c delco plugs in my gms. In my buick i am going to put a/c delco iridium plugs in it. The factory gap is 60 thousands. So thats what i am going to gap them at.
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Old 01-25-2010, 07:35 PM   #3
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Paul...you should be running Autolite 605'*. at a .50 or .55 gap. Your running too cold of plug for your set up.
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Old 01-25-2010, 10:39 PM   #4
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On a stock, or very lightly modded set up, the 605 gapped at .055. Once you start bringing up your boost levels a bit, then drop to a 104 and gap .050 to .055. You really wont need the 104 until your boost is over 10
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Old 01-26-2010, 09:06 PM   #5
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I thought so,when i bought them i got my advice from not such a reliable source.So i will change them its not that much money or time.I dont see myself dropping pulleys or anything untill at least spring,summertime when i have more money
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