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Old 05-07-2005, 03:26 AM
  #780  
RayJ
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Join Date: May 2003
Posts: 445
Default Shims

Most engines come from the factory shimmed to run at a MAXIMUM nitro content of 30%. If your running I believe an RB6 plug which i believe is a hot plug you run the risk of detonation in warmer weather. If you remove any one of these shims you will probably risk detonation at sea level, especially in warm summer temps. Motorman knows more about this, but I personally would leave it alone.
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