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Old 07-26-2009 | 10:35 AM
  #11  
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Iflyglow
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From: Clintonville, WI
Default RE: OS91FX with tuned pipe problem

I think you are asking to much of the .91. Just put a YS 1.10S or 1.15S in it and enjoy. They will easily spin your APC 15-8 at close to 10,000. If running 30%, a 15-10 is in order.