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Old 05-28-2010, 08:27 AM   #1
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Default Do I need shims w/ Ofna Force 28 to run 30%?

I have an Ofna Force 28 and have a new gallon of 30% nitro I got when I bought my RC, I have been running the Byrons 20% fuel in it for a few weeks and its got plenty of power but was just wandering if I have to add any shims or anything to the Force 28 to run 30% and will I have to retune the engine? I know the engine comes factory with 2 shims I believe.

let me know

thanks,
Remo
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Old 05-30-2010, 09:52 AM   #2
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Anyone?
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Old 05-30-2010, 11:41 AM   #3
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A Force 28 I had came with 3 shims from the factory. But to answer your question, I would just set the needles back to the factory settings, then idle a tank through it. Then run it for a couple tanks on the rich side still. Then you can start tuning it from there. I'm gonna be doing that here soon myself, making the jump from 20% to 30%. Hope this helps ya out.
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Old 05-30-2010, 05:04 PM   #4
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i have yet to ever shim a engine from .21 and up and have had no problems. just me check ur manual.
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