stupid spark plug question
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Pro
Joined: Jul 2008
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stupid spark plug question
ok. so i bought NGK TR55s for my 92 lt1. however i do not think they are the iridium plugs. Does this matter in the sense that it will cause damage to my engine or are the standard TR55s ok to run?
thanks
thanks
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From: Fort Knox, KY
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The NGK TR-55 Platinum plugs are more than adequate for a stock engine. If they don't say "Iridium" on the box (and you didn't pay upwards of $15 apiece for them, they are not iridium plugs.
Last edited by onedef92; Jul 9, 2009 at 03:18 PM.
Race Director
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From: Lake Wylie SC
My Iridiums where $7 a piece. From AutoZone, but not listed for Corvettes. The non iridiums will work just fine in your engine. They may not last as long. But we're talking 50K on your plug vs 100K on the Iridiums. Maybe.
Drifting
Joined: Sep 2003
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From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
However, the TR55's are also NOT platinum either (i.e. OEM) as their OEM version platinum plugs are part number is: PZTR5A-15.
Meaning you'll need to change them every 6-12k miles.
Hence the reason I put the TR55ix in our 94 and would recommend the same for you (as GM's service bulletin for our 2000 transam now recommends using iridium instead of platinum's, albeit acdelco, but acdelco doesn't make iridium for our LT1 engines).
btw, here's a link to the NGK website, use the 'part finder' pull down to find the above info for your 92: http://www.ngksparkplugs.com
