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My plug took a dump today I was wondering are the cr9e's hotter or colder then the 8's? And is it okay to run with the 9's or should i just buy another 8? are there any better plugs then the ngk's? with some noticeable gains? Let me know!
 

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Run the same heat range plug that the manual suggests. One reason the run a colder plug is when using nitrous, turbo, etc. I don't know of any reason to run a hotter plug. Hotter doesn't mean "more spark". It means the plug was designed to run properly in a different environment, as in, a different motor.
 

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I would just run the factory NKG. Just side gap them and make your own 7 dollar spark plug. I do this to my raptor spark plug. The plug suposedly last as long. I have been on my first side gapped plug for about a year and a half. Here is a web site expaling it all.
http://performanceunlimited.com/illustrations/sparkplugs.html
 
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