C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Need To Know

Old Jun 1, 2009 | 11:10 PM
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im2fast4you
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Default Need To Know

Witch Spark Plug Do I Use....On My 89 Stuck Corvette
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Old Jun 2, 2009 | 12:35 AM
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You can simply use the stock a/c delco plugs listed for your year model and make.I dont know the correct part number so youll have to get it from the store or dealer.

If you want to use an aftermarket plug,use NGK. Those are the best plugs I ever used on my other GM cars.They are really good quality plugs.
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Old Jun 2, 2009 | 06:16 PM
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From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
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Even though many will recommend the ACDelco's, if your year Vette calls for the Platinum plugs -- the issue of the ACDelco plugs loosing their 'pucks' is real and does happen (i.e. spot of platinum on the inside of the ground electrode) -- when I pulled the plugs (25k or so) on our 94 LT1 engine, 3 plugs were missing their 'pucks'.

Suggest going with NGK Iridium's (e.g. TR55ix) if applicable to your year.

Alternatively, Platinum Nipondenso's run very well (were in our 2000 TransAm with the LS1 (c5) engine -- had 112k and still looked good (with no lost pucks either).
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Old Jun 2, 2009 | 07:03 PM
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You might want to change your profile name - I'm pretty sure the last 2fastforyou is banned for life.
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