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Spark plugs heat range, What's the difference between 6,7 and 8

Dec 30, 2003 - 4:05 AM
ST-204 View Member Profile Enthusiast Joined Dec 21, '03 From Lynnwood, WA Currently Offline Reputation: 0 (0%)	As topic

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Dec 30, 2003 - 5:39 PM

ST-204

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QUOTE (SpedToe169 @ Dec 30, 2003 - 6:54 PM)

Ummm, that doesn't mean anything unless you tell us what brand of plug you are using.

The different heat ranges refer to the heat conduction characteristic of the plug. A 'hot' plug will retain a lot of heat instead of allowing it to flow into the head. A cold plug trys to let all its heat flow rapidly into the head. Its generally good to have the hottest plug you can manage without it causing detonation. Whenever you go with forced induction you'll usually want to go with a colder plug.

Thx a lot of ur reply, I am thinking about which brands is better for our Celica now, they are Denso Iridium and NGK IX Iridium

Posts in this topic

ST-204 Spark plugs heat range Dec 30, 2003 - 4:05 AM

SpedToe169 Ummm, that doesn't mean anything unless you te... Dec 30, 2003 - 1:54 PM

ST-204 QUOTE (SpedToe169 @ Dec 30, 2003 - 6:54 PM) Ummm, ... Dec 30, 2003 - 5:39 PM

SpedToe169 NP. Just a warning the Iridum plugs are overrated... Dec 30, 2003 - 6:38 PM

ST-204 QUOTE (SpedToe169 @ Dec 30, 2003 - 11:38 PM) NP. ... Dec 30, 2003 - 7:59 PM

SpedToe169 Nope. The only advantage they supposedly create a... Dec 30, 2003 - 11:13 PM

Komlofske So, let me get this right, colder is better for fo... Dec 31, 2003 - 2:47 AM

97GTinKC The colder a plug is, the quicker it dissipates he... Dec 31, 2003 - 1:47 PM

SpedToe169 Exactly right as ususal. Dec 31, 2003 - 1:57 PM

ST-204 QUOTE (SpedToe169 @ Dec 31, 2003 - 6:57 PM) Exactl... Dec 31, 2003 - 5:31 PM

5sfeTurbo I have denso iridiums,......no differnece but no c... Dec 31, 2003 - 7:42 PM

ST-204 QUOTE (ST-204 @ Dec 31, 2003 - 10:31 PM) QUOTE (Sp... Dec 31, 2003 - 11:49 PM

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