[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
This is from the NGK website.
This is for racers only !!
Indexing refers to a process whereby auxiliary washers of
thickness are placed under the spark plug's shoulder so
the spark plug is tightened, the gap will pointed in the
However, without running an engine on a dyno, it is
gauge which type of indexing works best in your
most engines like the spark plug's gap open to the intake
there are still other combinations that make more power
gap pointed toward the exhaust valve.
In any case, engines with indexed spark plugs will
only a few more horsepower, typically less than 1% of
output...for a 500hp engine, you'd be lucky to get
are exceptions, the bottom line is that without a dyno,
success will be difficult.
84 SVO, Silver