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  1. #1

    earthquake 3.5 bog problem

    As the title says. Its runs awesome for 5 minutes. Then will bog as I try to give it full throttle. I have tuned many rc cars and this ones seems to be tuned dead nuts on. For the first 5 minutes I can go full throttle and no bog. Then out of nowhere it starts to bog. Any ideas or suggestions would be great.

  2. #2
    ijpom's Avatar
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    Aug 2014
    Western Chicagoland
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    Hi Joe and welcome to RCU,

    Sounds like the engine has not reached operating temperature in the first 5 minutes and is tuned too lean for the temp at that point.
    I found that the large nitro engines don't reach their operating temperatures in half a tank the long way. Same symptoms as yours.
    Expect to warm the engine up in the first tank, then re-fill while running, and start you high speed tuning runs from there.

    At this point you should probably richen up the HSN 1/2 to a full turn to make it past the 5 minute mark.

    Hope that helps.
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