Indexing LT5 spark plugs - ZR-1 Net Registry Forums

ghlkal · 02-07-2017

Does anyone index their plugs?

I was thinking about this because some of the new DI engines apparently require the plugs be indexed.

I don't know if it really provides any significant power increase, but since the plugs are so easy to get to and "see," I was thinking about doing it this coming plug change.

I assume I want the gap opening pointed "up" toward the intake valves, correct?

02-07-2017	#1
ghlkal Join Date: Jan 2012 Location: Wisconsin Posts: 887	Indexing LT5 spark plugs Does anyone index their plugs? I was thinking about this because some of the new DI engines apparently require the plugs be indexed. I don't know if it really provides any significant power increase, but since the plugs are so easy to get to and "see," I was thinking about doing it this coming plug change. I assume I want the gap opening pointed "up" toward the intake valves, correct? __________________ 1990 ZR-1 #2180 Red/Black Many of the usual mods for 460HP, tuned by Marc Haibeck ZR-1 Net Registry Member #1548