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Colder plugs really make that big of a difference?

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Colder plugs really make that big of a difference?

 
Old 08-04-2007, 05:52 AM
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Default Colder plugs really make that big of a difference?

Do They?
They keep temps in the chamber "cooler" right? So, would something like this be "noticeable" compared to regular NGK Plugs?
How so?
I did do a search, And did read that its cooler at the tip because it gets the job done so well, but the heat has to go somewhere, the cooling system. I just want to know, not if its worth getting them, but is the difference Noticable?
Sorry if thats confusing
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Old 08-04-2007, 09:59 AM
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rule of thumb is get 1 range cooler for every additional 100 hp. It is a loose rule.

Get cooler plugs if you have a detonation problem that isn't caused by over agressive timing. If you're not detonating, then don't get them. They work by being less efficient than hotter plugs. And the heat they suck out of the combustion chamber goes into the head and thusly the cooling system.

I was detonating a little on stock plugs. Went to the HR7 extended reach NTKs that FM recommends. No more detonating. But my economy is down. I am going to try the oem plugs again because I have some, and then standard reach hr7 plugs if the oem ones deto.
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Old 08-04-2007, 02:40 PM
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DSCF1053Medium.jpg

Yup.

I'm now using
NGK BKR7E-11
NGK SPARK PLUG STOCK #1283

You can find them eaisly at atv shops. (oem equipment for the Polaris Sportsman)

Don't use Iridium or Platinum on a boosted motor either. All they was designed for is to last longer. With the electrode being so thin it doesn't conduct head for $hit. Keep your gap at .032" and if you misfire under high boost .028".

Last edited by lazzer408; 08-04-2007 at 02:51 PM.
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