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Author Topic: Difference ng Cold Spark Plug & Hot Spark Plug?  (Read 2662 times)

Offline jc_lim3

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Difference ng Cold Spark Plug & Hot Spark Plug?
« on: June 06, 2006, 10:58:50 AM »
What's the difference between the two? Kasi minodify namin yung 2E engine namin to throttle body injection. So far yung spark plug pag chinecheck namin puro carbon.

Ano pa ba other causes ng carbon build-up sa spark plug?

Eh nabasa ko na pag excessive yung carbon, kailangan daw namin ng hot spark plug?


Linkback: https://www.autoindustriya.com/talkboard/modified-cars/4/difference-ng-cold-spark-plug-and-hot-spark-plug/21848/

Offline Conan®

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Re:Difference ng Cold Spark Plug & Hot Spark Plug?
« Reply #1 on: June 06, 2006, 12:44:15 PM »
Read all about it here:

http://en.wikipedia.org/wiki/Reading_spark_plugs_for_racing

You could be running too rich though.

Offline be989

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Offline Accord GTR

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Re:Difference ng Cold Spark Plug & Hot Spark Plug?
« Reply #3 on: June 14, 2006, 11:58:20 PM »
Hot & Cold means the relative cooling capacity of the plug while operating in your particular engine.  Use too "hot" of a plug and your plugs could burn away.  Use too "cold" and your plugs will foul or get caked by too much carbon deposits that they will fail to ignite.

If its a stock engine , start off using stock plug even though you have IHE.   Then check to see you have the  the correct mixture and ignition settings.  You could be idling rich but leaning out on top so it'll help if you can check your engine in a dyno.

It also depends at what rpms you'll be running...like its different driving my Type R on the street where its always below 5000rpm and on the track when its always above 5000rpm.  I use the stock #6 plug for the street and switch to a colder #7 or #8 plug for racing.

Ask your friendly neighborhood tuner if your not sure which plug to use.  But 9x out of 10, you'll be fine with he stock plug for regular use and one plug or 2 plugs colder for racing and for turbocharging

Remember, there is only the correct heat range to use so changing spark plugs won't give you "more" power.   But you can lose power if you use the wrong heat range or worse, damage your engine.


There is no dishonor in losing the race. There is only dishonor in not racing because you are afraid to lose. - Pocholo Ramirez

Offline nubie

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Re:Difference ng Cold Spark Plug & Hot Spark Plug?
« Reply #4 on: June 25, 2006, 08:23:36 PM »
yeah, u cud damage ur engine if u use too hot spark plugs. as they cause "pre-ignition" :P wen using too cold naman, the engine myt not start ryt away or might foul.. coz its too cold (bat parang inulit ko lang ung cnabi ni accord gtr???) hahahahahahahahaah   :) wla lang, its been a while ksi....  :P
it's how you drive

Offline icelock

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Re: Difference ng Cold Spark Plug & Hot Spark Plug?
« Reply #5 on: August 16, 2007, 01:03:09 PM »
follow-up question lang.
nakalagay kasi sa manual use hot type spark plug if the engine does not reach optimum temperature range.
so how far (km) or how long (mins) does it take the engine to reach optimum temperature range after start-up?

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