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01-11-2013
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#1 |
 Join Date: Aug 2006
Location: McLean, VA
Posts: 3,726
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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. |
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01-11-2013
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#2 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,181
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Re: Spark plug question
I run the Regular cheapy AC Delco 41602.. BUT I believe the spark plug seat is different in the later years (I have a 1990)
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
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01-11-2013
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#3 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,491
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Re: Spark plug question
Dittos on the 41 602s.
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[I][COLOR="Blue"]Good carz, good food, good friendz = the best of timez![/COLOR][/I] 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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01-11-2013
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#4 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,726
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Re: Spark plug question
Quote:
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01-11-2013
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#5 | |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,181
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Re: Spark plug question
Quote:
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
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01-11-2013
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#6 | |
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Join Date: Oct 2004
Posts: 1,889
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Re: Spark plug question
Quote:
Last edited by WVZR-1; 01-11-2013 at 12:54 PM. |
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01-11-2013
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#7 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,726
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Re: Spark plug question
Quote:
Anyone know what part number that would be? |
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01-11-2013
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#8 |
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Join Date: Oct 2004
Posts: 1,889
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Re: Spark plug question
R44LTS6 is what's referenced in an export catalog for the taper seat. You could change the heat range up or down from there 43 being cooler and 42 cooler yet.
That is a conventional plug and I would guess you'd gap as the 41-602. If it would help at all the 41-602 changes to a Denso 20 and the R44LTS6 to a Denso 16 if you care to use that for heat-range comparisons, using the R43LTS6 that changes to a comparison to either a Denso 16 or 20. Last edited by WVZR-1; 01-11-2013 at 02:24 PM. |
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