Using new fuel

Old 04-27-2008, 09:55 AM
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Default Using new fuel

Hey guys, I picked up a Mbx5t from a guy who was running Byrons 20% and I am planning on switching it to 25% gen2. Ive never tuned an engine before but I understand the basics. From what I hear from the guys here I will end up having to lean it out a half turn or so. Should I go an hour at a time on the top end until it seems right? BTW it has an LRP .28 with less than 2g through it. Thanks for any help.
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Old 04-27-2008, 10:05 AM
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Make small adjustments. Remember good smoke,good throttle=good engine. I know some people only use that method to tune but I use a temp gun. As far as exactly how much you should turn your needles in, that will vary from engine to engine, temperature, humidity, many variables. I just made the same switch and my low side was more sensitive to the change but get your high side right first then work on the low.
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Old 04-27-2008, 11:13 AM
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Raising the nitro %, may need to reshim head button as well.
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Old 04-27-2008, 12:25 PM
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The "racers" at the hobby shop said I would not have to going up 5%. Is it recommended that I do and how do I go about doing that?
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