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Sparkplug Coloration

'67 Charger Kid

Well-Known Member
Local time
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Joined
Jun 29, 2011
Messages
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Location
Arizona
Can someone tell me if it's normal wear, too lean, too rich, too hot, too cold, something else?

SANY0721.JPG
 
Looks like its running a little hot, timing set ok! engine over heating some..
 
what kind of fuel are you running ? those are extended tip plugs also, they will tend to look darker towards the tips, it should still have a uniform tan color all over, are you running Gasahol or E-85 or some sort of octane boosters or something ? what kind of ignition & ignition timing are you running ? is there signs of water in the fuel ?
 
what kind of fuel are you running ? those are extended tip plugs also, they will tend to look darker towards the tips, it should still have a uniform tan color all over, are you running Gasahol or E-85 or some sort of octane boosters or something ? what kind of ignition & ignition timing are you running ? is there signs of water in the fuel ?

Running 91 Octane, The Mopar small block electronic ignition and the timing was set by ear. Think it's needs to be retarded a little?
 
Well you can assume that it's not running rich.... But a picture is hard tell by.
How does the wire look close up? does it have any distortion like it's been melted or pitted up?
I think 70rr could have a point with the additive comment too... Does that redish brown stuff wipe off, or has it been made that way because of heat or lean conditions?
Typicaly you want to see a honey color, and uniform. If I were to guess, I'de say it's a touch on the lean side. But then again, I see plenty of carbon down in the shell, or at least I think that's what I'm seeing..... Hard to say from a picture.
 
Well you can assume that it's not running rich.... But a picture is hard tell by.
How does the wire look close up? does it have any distortion like it's been melted or pitted up?
I think 70rr could have a point with the additive comment too... Does that redish brown stuff wipe off, or has it been made that way because of heat or lean conditions?
Typicaly you want to see a honey color, and uniform. If I were to guess, I'de say it's a touch on the lean side. But then again, I see plenty of carbon down in the shell, or at least I think that's what I'm seeing..... Hard to say from a picture.

The brown on the electrode does not wipe off but the black soot around the thread wipes right off. The wires are new, it did run hot with the plugs in because a freeze plug leaked out when I was driving it.
 
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