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Old 08-26-2009 | 06:00 PM
  #8419  
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22Racer
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Originally Posted by ConciliumDesign
What is the correct shimming for a GO .25 6 port using 25% nitro? Is the crank for the .25 6 port different from the .21 5/7 port engines? What is a good pipe to use for the .25 6 port? I have; 086, ttr 2035. 0801, and 2047. What would be the best one to use for a medium sized track in a truggy. Thanks
I would probably take out one thin .004 shim for 25% but never tried it. The .25 and .28 crank are the same but longer stroke than a .21. We've been running a 086 but the 0801 works very well and gets better mileage. You could try the 2047 with the 0801 header also. We've been running the .25 with the turbo button and a shim to change timing and it kicks butt.

Rex
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