indexing plugs
- Thread starter busterrm
- Start date
plug fouling, issues
hi, Im wondering if an auto spark plug can burn carbon off once it is all carboned up if the changes are made to the engine to give the proper air fuel mix. Can plugs be cleaned of carbon and can plugs be bead blasted to clean or does it ruin the plug. What would be a way to clean the plug? Or...
garage.grumpysperformance.com
this should help,your quench distance should be between .038-.044,
you might want to INDEX the plugs so the ground strap faces up minimizing the chance the piston can contact the plug ground electrode at TDC
in some engines with pop-up pistons indexing the plug with the ground strap toward the combustion chamber prevents mechanical contact between the piston dome and plug ground strap, if you take the time too draw a line indicating the ground electrode with a magic marker on the plug insulator you can determine how it seats facing in the heads, swapping a plug between cylinders can easily change where it seats and where the ground electrode is indexed,but there are washers of various thickness that can be used to change that index location.
In theory having the ground electrode between the green liines is the idea. having it located at or closer to the red location is ideal , in theory,the idea is to have the ground electrode face toward the chamber roof and the open arc of the ignition face slightly to the exhaust valve but as long as the ground electrode is located toward the chamber roof it works fine
there are several types of spacer washers for both taper seat and standard plug designs that allow you to index plugs
http://www.shop.speedunlimited.com/p-58 ... -seat.aspx
Moroso #71900 Spark Plug Index Washers, Copper, Tapered Seat, for 14mm Plugs, Sizes .010, .021, .032 in., 10 of Each, Set of 30.
M28-71900
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