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Old 07-06-2009, 10:45 AM   #1
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Default Please any help would be great

I just bought a used motor and he was running 30% nitro fuel in it and was wondering if it would kill it if I swapped down to 20% I have heard its not good to jump up in % but havent heard anything about going down so any advise would be great thanks
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Old 07-06-2009, 11:02 AM   #2
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Changing nitro content is fine. You will just have to re-tune.
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Old 07-06-2009, 11:03 AM   #3
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Quote:
Originally Posted by pitstang View Post
I just bought a used motor and he was running 30% nitro fuel in it and was wondering if it would kill it if I swapped down to 20% I have heard its not good to jump up in % but havent heard anything about going down so any advise would be great thanks
No you can change. You might have to take a head shim out depends on which engine it is and how many shims are in there. But switching to 20% is fine.
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Old 07-06-2009, 11:38 AM   #4
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Thanks for the info its a caster grenade .21
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