'08 O.S. VZB V-Spec- How Many Shims Should I Use? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-17-2008, 02:22 PM   #1
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'08 O.S. VZB V-Spec- How Many Shims Should I Use?

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Hey guys. I am running Byron's Gen II 30% fuel. I just recieved my new VZB in the mail today. It is shimed from stock. It also come with a 0.1mm copper shim. Should I be using that if running a higher nitro content fuel?
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Old 06-17-2008, 02:26 PM   #2
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if i remember right the v-specs were already shimmed for 30%
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Old 06-17-2008, 03:01 PM   #3
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if it comes in the box i would say yes even if u put it in and u werent supposed to its going to feel like u are running 25.

also so recommed this for break in.
Justin Dasilva
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Old 06-17-2008, 05:30 PM   #4
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It's generally used for break-in. You could also be used in hot humid weather with a hotter plug. Stock and 30% would be fine. If you left it in it would reduce the squish band and increase top end slightly.
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