HEY GRUMPYVETTE?
Need some help reading plugs; are these running lean? They've got about 180 miles on them. The background is a sheet of white paper and a brown paper bag.
http://garage.grumpysperformance.com/index.php?threads/spark-plug-info.202/
you might want to watch this video on swapping to low resistance ignition wire
yes they are running a bit lean,under power and a bit rich at idle and your ignition timing is either about correct or marginally advance from ideal.if your not familiar with reading plugs, those plugs look better than most I see on street cars after 180 miles
theres a great deal of info here in these threads and sub links
viewtopic.php?f=70&t=202
viewtopic.php?f=70&t=5428
http://www.autorepairinstructions.com/?cat=7
example
http://www.4secondsflat.com/Spark_plug_reading.html
and
http://www.strappe.com/plugs.html
basically your concerned with the color of the ash, the distance the heat ring on the ground strap moves toward the plug body and the look of the porcelain around the center electrode , gap the plugs at .045 and run the ignition advance so the engines fully advanced by about 3100rpm, for max mileage you want about a 15:1 fuel air ratio, for max power the fuel/air ratio will need to be closer to about 12.7:1
Need some help reading plugs; are these running lean? They've got about 180 miles on them. The background is a sheet of white paper and a brown paper bag.
http://garage.grumpysperformance.com/index.php?threads/spark-plug-info.202/
you might want to watch this video on swapping to low resistance ignition wire

yes they are running a bit lean,under power and a bit rich at idle and your ignition timing is either about correct or marginally advance from ideal.if your not familiar with reading plugs, those plugs look better than most I see on street cars after 180 miles
theres a great deal of info here in these threads and sub links
viewtopic.php?f=70&t=202
viewtopic.php?f=70&t=5428
http://www.autorepairinstructions.com/?cat=7



example
http://www.4secondsflat.com/Spark_plug_reading.html
and
http://www.strappe.com/plugs.html
basically your concerned with the color of the ash, the distance the heat ring on the ground strap moves toward the plug body and the look of the porcelain around the center electrode , gap the plugs at .045 and run the ignition advance so the engines fully advanced by about 3100rpm, for max mileage you want about a 15:1 fuel air ratio, for max power the fuel/air ratio will need to be closer to about 12.7:1
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