SPARKPLUG IU24 hot vs IU27 cold
- Thread starter traxxas-modifier
- Start date
express unlimited
Super Veteran
same thing here. the mechanic said to use ordinary sp than iridium. according to him, iridium sp is designed for cold places so its much easier to start the engine. In tropical places like the philippines, ordinary sp will do. same performance he said. dunno if thats true.
macoolet
Super Veteran
hahaha...y dont we create another thread in the filipino speaking area so we dont need to bleed are noses out in this english speaking area...
BTT i think same reason for the mechanics..and also for the coil...same as the SP..use OEM not the racing type...whew...t135...there's too much secrets and techniques
BTT i think same reason for the mechanics..and also for the coil...same as the SP..use OEM not the racing type...whew...t135...there's too much secrets and techniques
sniperyaz
Super Veteran
Various circumstances such as engine conditions and driving conditions are rough measures for choosing a plug. For example, if strenuous driving is continued for a long time using normal plugs, the plug will overheat.
This is why the idea of a regular plug for a regular car doesn't work.
What's important is to inspect the condition of your current plugs, and then choose a plug accordingly.
The heat range will change with the seasons.
When the air temperature is high, as in the summer, the inlet air temperature becomes higher, increasing the load on the engine. In times like this, it's better to choose a plug with a higher heat range.
The more horsepower is increased, the higher the required heat range.
If the horsepower has been increased through tuning, the increase in explosive power leads to an increase in combustion chamber temperature, making pre-ignition more likely; in such cases it is necessary to choose a plug with a higher heat range and a higher
level of heat resistance.
IU24 above use for hi air temp like summer
IU24 below use in rain season or winter season
in philippines it is better to use IU24 in rain season and IU27 for summer
This is why the idea of a regular plug for a regular car doesn't work.
What's important is to inspect the condition of your current plugs, and then choose a plug accordingly.
The heat range will change with the seasons.
When the air temperature is high, as in the summer, the inlet air temperature becomes higher, increasing the load on the engine. In times like this, it's better to choose a plug with a higher heat range.
The more horsepower is increased, the higher the required heat range.
If the horsepower has been increased through tuning, the increase in explosive power leads to an increase in combustion chamber temperature, making pre-ignition more likely; in such cases it is necessary to choose a plug with a higher heat range and a higher
level of heat resistance.
IU24 above use for hi air temp like summer
IU24 below use in rain season or winter season
in philippines it is better to use IU24 in rain season and IU27 for summer
jimpie
Super Veteran
nice info bro. that's the reason why i use the iu24
because the rainy season its coming to town 
docgabby
Super Veteran
ordinary plugs last longer and are less "sensitive". if you look at the recommendation of denso regarding their iridium racing plug they advice only for racing and not for normal use because they don't last that long. for daily use going from here to there ordinary driving ordinary plugs will do. ordinary plugs have broader range of "normal" application. special plugs better power but narrow "special" range of application. special plugs if they foul most probably good bye..expensive. ordinary plugs if they foul often times cleaning will extend their life a little.
rspayumo
Super Veteran
Amen! Exactly the same reason why our mechanic (Macoolet & I) don't want to use iridium plugs. Right Macoolet?
sniperyaz
Super Veteran
is that iridium power? or iridium racing spark plug?
docgabby
Super Veteran
i still use denso iridium power plugs and carry a spare in my tool box (ngk has no equivalent for the cprea8-9, only use recommended iridium plug equivalent by the manufacturer). it still a matter of personal choice with the pros and cons. you can afford it then go for it. not all have the same experience or belief. like i said its a matter of personal choice. and also make sure you get your jettings right so you dont keep on fouling plugs whether ordnary or iridium!! persistent/ consistent fouling shortens the life of a plug.
doc
NGK uquivalent is CR8EIX or CR9EIX
denso is more sensitive to fouling than ngk.
the reason is NGK has special cleaning feature designed in the plug
see this video
CAUSE OF SPARK PLUG FOULING
http://www.youtube.com/watch?v=F8blkWNWvkM
i agree with doc gabby, its best to have extra plug always (standard plug if possible)
if your carb is not properly tuned, it will kill your iridium plugs.
before my iridium plug lasts only 1 week.
after proper jetting and tuneup my iridium (ngk) lasts.
i use it in the megaride69, yamahagp, thats 4000kms of riding already.
works perfectly until now...
i always advise, if your carb is not properly tuned, go for standard plug.
once its tuned, you can try iridium
as what doctors advise:
make sure you have your first aid kit ready