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Old 07-20-2009 | 06:31 AM
  #76  
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keavze
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Joined: May 2007
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hi houston,
just wondering why offroad .21engines usually use a much hotter plug than onroad .21engines?

i've seen people using os p3 for their offroad engines but when it comes to onroad engines they'll use a much colder plug like nova#7. both using 25% nitro, air temp about 77F and humidity about 70%.

also, which is more damaging? over lean HSN or over lean LSN?
Last edited by keavze; 07-20-2009 at 06:50 AM.
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