OS 91 engine info

[Scott Anderson]

Thank you for the reply, I'm still in the tuning phase also right now with a OS 91 fx and using the Karl Mueller header and a macs pipe (1062), I'm running 25% cool power with a 14x10 and 15x10 prop. 
  ----- Original Message ----- 
  From: Ihncheol Park 
  To: discussion at nsrca.org 
  Sent: Friday, October 31, 2003 10:42 PM
  Subject: RE: OS 91 engine info


  Hi, Scott,

  My 91 SX-H with standard Macs Products' 91FX header and Blue Bird 140 2C pipe (not available in the states anymore) turns APC 15x8 @ 10250 @21.6" from glow plug to first baffle.  Not all tuned yet.  This is with Magnum #1 or Coolpower 25%.  I don't remember which fuel I used when measured this.

  Hope this helps,

  Ihncheol Park
    -----Original Message-----
    From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Scott Anderson
    Sent: Thursday, October 30, 2003 4:56 AM
    To: discussion at nsrca.org
    Subject: OS 91 engine info


    Good Morning,

    I see that there was some info being kicked around about the os91 2 stroke engine with props and a head shim, but what is the pipe length to first baffle from glow plug ( straight line). 
    Thanks..

    scott
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