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Old 06-15-2009, 06:58 PM   #1
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Default How many shims?

I purchased a used RB C6. it has 2 shims in it, so I'm not sure if the previous owner used 30% or 20% fuel. I will be using 20%, should I have 1 or 2 shims installed?
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Old 06-15-2009, 07:04 PM   #2
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If nobody with one posts the rule used to be about .008" per 10% nitro.Somebody on here should have one apart or jsut had one apart to measure.
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