Reading Spark Plugs
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Reading Spark Plugs (Arisa)
Like completely black as in the insulator is black? I THINK if memory serves that means 3 possible things. Either it's burning oil, but that usually leaves an oily film. Or if it's dry black then it's running rich, or the plug is no the right heat range, it's running too cold to keep itself clean.
I THINK. Maybe somebody can verify or disprove this. I know if the plug is white it's because it's running lean or it's too hot a heat range, would only make sense that black is just the opposite right?
What plugs are you using at what gap?
I THINK. Maybe somebody can verify or disprove this. I know if the plug is white it's because it's running lean or it's too hot a heat range, would only make sense that black is just the opposite right?
What plugs are you using at what gap?
Thread Starter
Race Director
Joined: Jul 2000
Posts: 11,007
Likes: 1
From: Probably in the paint booth....
Re: Reading Spark Plugs (Nathan Plemons)
IR-555's (I think that's the number. The popular ones) In the iridum varity.
.050" if memory serves right.
They turn this way after the car starts acting up (misfiring). I can clean them right up with a dry toothbrush (course my teeth keep turning black :eek: )
.050" if memory serves right.
They turn this way after the car starts acting up (misfiring). I can clean them right up with a dry toothbrush (course my teeth keep turning black :eek: )
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Reading Spark Plugs (Arisa)
They turn this way after the car starts acting up (misfiring). I can clean them right up with a dry toothbrush (course my teeth keep turning black :eek: )
Worth trying anyway.
Pro
Joined: Oct 2001
Posts: 682
Likes: 23
From: loxahatchee fla
Re: Reading Spark Plugs (Nathan Plemons)
read this
http://www.ngksparkplugs.com/techinf...overviewp2.asp
http://www.babcox.com/editorial/cm/cm59910.htm
http://www.users.bigpond.com/ergoff/splug6.htm http://www.autolite.com/framer.cgi?p...cts/racing.htm
http://www.eric-gorr.com/techarticles/sparkplugs.html
http://www.atlanticjetsports.com/_techtalk/00000005.htm
http://www.racinghelp.com/read_spark_plugs.html
http://www.centuryperformance.com/spark.htm
http://www.tsrsoftware.com/read-plugs.htm
http://www.zhome.com/ZCMnL/PICS/deto...etonation.html
http://www.ngksparkplugs.com/techinf...tnumberkey.pdf
www.acdelco.com/html/pi_plugs_ident.htm
http://www.ngksparkplugs.com/techinf...overviewp2.asp
http://www.babcox.com/editorial/cm/cm59910.htm
http://www.users.bigpond.com/ergoff/splug6.htm http://www.autolite.com/framer.cgi?p...cts/racing.htm
http://www.eric-gorr.com/techarticles/sparkplugs.html
http://www.atlanticjetsports.com/_techtalk/00000005.htm
http://www.racinghelp.com/read_spark_plugs.html
http://www.centuryperformance.com/spark.htm
http://www.tsrsoftware.com/read-plugs.htm
http://www.zhome.com/ZCMnL/PICS/deto...etonation.html
http://www.ngksparkplugs.com/techinf...tnumberkey.pdf
www.acdelco.com/html/pi_plugs_ident.htm
Drifting
Joined: Aug 2001
Posts: 1,500
Likes: 0
From: Holliston MA
Cruise-In VII Veteran
Re: Reading Spark Plugs (Arisa)
Sounds like a rich mix. Oil will leave a shiney black, crusty black or ashy grey deposts.
If a leaner mix doesn't clean the plugs up, then you're going to need to try a hotter plug.
If a leaner mix doesn't clean the plugs up, then you're going to need to try a hotter plug.
