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Old 10-07-2014, 12:57 AM   #1
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Default Engines and Hot weather

Hi All,

What is everyone doing with there engines when the air temperature reaches 30deg c (80deg F). Example more head shims different Plugs etc.

Also do you do anything different when the temp rises above 35 deg C (95 deg F)

Is there a rule of thumb everyone follows?
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Old 10-07-2014, 01:38 PM   #2
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When the temperature gets above 70f(21c) I move from a #5 plug to a #6 plug. Rule of thump the hotter air temps the leaner the carb settings. I only run 16% nitro in a .12 size Novarossi engine.

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Old 10-07-2014, 02:01 PM   #3
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If your engine has a low CG cooling head you can mount a normal head from a cheaper motor. It will be placed higher and so will get more airflow which is comming through the front window.
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Old 10-07-2014, 04:22 PM   #4
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Just change to a cooler plug. 5/6 or 7/8 depending on what size engine we are talking about. Then off course retune the carb to suit the different operating environment. I wouldn't bother changing heads as I've never had an issue running the low cg evo heads on my novarossi's in temps exceeding 35 degrees (personally never seen anyone do that).
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Old 10-08-2014, 03:10 AM   #5
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In the 1/8 it is done a lot and it does give lower temps. The Keep-on and other models with a low CG head can handle a normal head like from a Flash.
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