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2revo1maxx
Hardcore RCTalk User
Medium plugs are good for all around weather. You want to run a hot plug if it's hot and cold if it's cold. It has to do with the timing and how hot they burn. A hot plug will advance the timing and cold will retard the timing......I think. I almost always run medium and they work excellent......O'donnell #77 or #100, depending on engine size.
neobart
Hardcore RCTalk User
It's a popular belief that you should run a certain heat range of plug depending on temperature. I have found that to not necessarily be true.
It's all about timing. Cold retards the timing and hot advances it. Low nitro 0-16% needs to run with a hot plug, and 20% and above needs a medium to cold plug. Also small block engines(.20 and below) usually uses hot to medium plugs and big blocks(.21 and above) run medium to cold plugs. But this is all generally speaking, there are plenty of times when this doesn't apply.
What makes it even more confusing is the fact that the heat ranges of different makes of plugs do not compare directly.
They all have different definitions of hot, medium and cold.
It's all about timing. Cold retards the timing and hot advances it. Low nitro 0-16% needs to run with a hot plug, and 20% and above needs a medium to cold plug. Also small block engines(.20 and below) usually uses hot to medium plugs and big blocks(.21 and above) run medium to cold plugs. But this is all generally speaking, there are plenty of times when this doesn't apply.
What makes it even more confusing is the fact that the heat ranges of different makes of plugs do not compare directly.
They all have different definitions of hot, medium and cold.
neobart
Hardcore RCTalk User
Don't own a T-Maxx but know that the 3.3 and 2.5r both like to run a OS LC3 it's a long reach(meaning std. length as OS plugs are shorter than any other make) hot plug. If you can't find that plug try a McCoy MC59.
revo_rob_1984
OverMedicated
Supporter
My Picco .26 Red Dot likes 25% Nitro fuel and O.S. #10A5 cold plugs
2revo1maxx
Hardcore RCTalk User
Yes the lc3 works great in a 3.3 or 2.5, but I've had better luck with the O'donnell #77 in below 70 degree weather. I have a stock of both types they're excellent choices.
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