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Old 09-07-2003, 07:18 PM   #1
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2006 ION Red Line
Default Hotter Plug

I am currently running the NGK V-Power plugs. I'm looking to continue using these, but move up to the next hotter plug. Does anyone have access to a part number?

On another note, the engine seems to be a bit stumbly (pinging?) and I am wondering if these might help make some better combustion. I'm running Accel Coil Packs, with Magnecore wires, AEM CAI, Bored TB, 92 Header/downpipe into a high flow cat with 2.25" piping back to a dynomax superturbo muffler. I have the adjustable fpr tuned down to 40psi max, and not sure it matters but an alum flywheel. My thinking is that the more air coming in may require a bit hotter of a plug for proper combustion.
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Old 09-08-2003, 12:17 AM   #2
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What do you want to run HOTTER plugs?
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Old 09-08-2003, 12:32 AM   #3
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2006 ION Red Line
Default Re: Hotter Plug

Assuming you meant Why do I want to run hotter plugs...

Quote:
Originally posted by Applefool
My thinking is that the more air coming in may require a bit hotter of a plug for proper combustion.
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Old 09-08-2003, 01:11 AM   #4
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Default

Hotter plugs will increase the chance of preignition.

Only use hotter plugs if they are getting carbon fouled. Do this. Remove a plug and look at it the ceramic should be a tanish color. This is normal. Black soot means too cold of a plug or you are burning oil. Too hot of a plug can cause knock or ping and sometimes the electrodes will melt.
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Old 09-08-2003, 01:17 AM   #5
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"Conversely, a cold spark plug has a shorter insulator nose and absorbs more combustion chamber heat. This heat travels a shorter distance, and allows the plug to operate at a lower internal temperature. A colder heat range is necessary when the engine is modified for performance, subjected to heavy loads, or is run at high rpms for a significant period of time. The colder type removes heat more quickly, and will reduce the chance of pre-ignition/detonation and melting or damage to the firing end. (Engine temperature can affect the spark plug's operating temperature, but not the spark plugs heat range)."

http://www.ngksparkplugs.com/techinf...000&country=US
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Old 09-08-2003, 01:27 AM   #6
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2006 ION Red Line
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Hmm, then perhaps I may be looking for a slightly colder plug. I think I will remove the plugs tomorrow, and get a decent photo up.

All of this spawned when I noticed it starting to stumble at idle, and seemingly running crappy under 3k rpms. I also noted that this just recently started with the colder temperatures we have had lately.
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Old 09-08-2003, 12:08 PM   #7
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2006 ION Red Line
Default Pics of Plugs

A couple shots of the plugs in question.





Does this indicate too lean of a condition?
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Old 09-09-2003, 03:42 AM   #8
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How many miles on the plugs?

If the plugs are too hot the corner on the arm over the top will round out quickly.

I don't have much experience reading plugs, but color looks possibly ok (mainly don't want them fouled, and don't want them pitted AFAIK) on 1,2, and 4. But the electrode on #3 there looks beat up. Is the insulator damaged there too? That could be caused by detonation, leanness, too hot of a plug, or just a defective plug, I suppose. I can't quite tell from the pictures, but it looks like the gap is longer than the rest on that one too. That could cause a misfire.
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