1994 Vortech Cobra spark plugs?
10-13-2008, 12:02 PM
#1
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1994 Vortech Cobra spark plugs?
What plugs should I be running? Car's engine is stock and I'm running 10lbs of boost on a custom tune w/typical fuel mods. Any suggestions on running 2 steps colder and gap? The exact plug part# would help too because the guy at the dealer and Auto Zone doesn't have any idea. Searched the forums and couldn't find anything. Heard a lot of good stuff on Autolites but no idea what the part# is for 1 step and 2 steps colder. Gap suggestions would help too and thanks techs!
10-13-2008, 02:27 PM
#3
4th Gear Member
Join Date: Aug 2007
Location: Texas
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Since you have iron heads run one heat range colder and gap the plugs to .30. I am running champion 2 steps colder on my car gapped to 30(running aluminum heads). I would get the autolite 24's or NGK R5674-7(NGK stock #3535). Hope this helps.
10-13-2008, 03:26 PM
#5
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Those plugs for a stock 5L...Question was for a Cobra which has GT 40 heads....
10-13-2008, 03:32 PM
#6
in limbo
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
i didnt really know the answer so i just stated what stock was and i knew boost had to be a closer gap but wasnt sure about the colder plugs. still learning!!!!
10-13-2008, 03:44 PM
#7
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I just put in autolite 103s and gapped to .035. It seems to run good so.... Here's the chart I found.
http://www.ls1.com/forums/showthread.php?t=13070
http://www.ls1.com/forums/showthread.php?t=13070
10-13-2008, 04:08 PM
#9
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Join Date: Jul 2008
Location: Burnt Hills, NY
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I just put in autolite 103s and gapped to .035. It seems to run good so.... Here's the chart I found.
http://www.ls1.com/forums/showthread.php?t=13070
http://www.ls1.com/forums/showthread.php?t=13070
