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earthquake 3.5 bog problem


Old 01-06-2016, 11:15 AM
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Default 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.
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Old 01-07-2016, 01:35 PM
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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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