Spark plug question - ZR-1 Net Registry Forums

secondchance · 01-11-2013

Need info:

I believe initial factory install for LT5s were FR2LS. Circa around 2000, a lt of ZR-1 guys were running AC Delco Rapidfire #5. I tried AC Delco Platinum tip briefly but trashed them after finding one of the plug had a crack in the insulation and went back to Rapidfire.
It seems current AC Delco Rapidfire is now platinum tipped. Does AC Delco has non-platinum tip replacement for LT5s? Part number?
I am running ND Iridium plugs but not that impressed.

Thanks.

01-11-2013	#1
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,726	Spark plug question Need info: I believe initial factory install for LT5s were FR2LS. Circa around 2000, a lt of ZR-1 guys were running AC Delco Rapidfire #5. I tried AC Delco Platinum tip briefly but trashed them after finding one of the plug had a crack in the insulation and went back to Rapidfire. It seems current AC Delco Rapidfire is now platinum tipped. Does AC Delco has non-platinum tip replacement for LT5s? Part number? I am running ND Iridium plugs but not that impressed. Thanks.