DrifterX27 Posted September 12, 2004 Share Posted September 12, 2004 just wondering, but wut spark plugs do any of u believe is the best for my car, 95' Lexus SC300? wut kind are in your car? any difference? i hear the bosch platinum +4 is good. any info is good. thanks Quote Link to comment Share on other sites More sharing options...
SCdriver Posted September 12, 2004 Share Posted September 12, 2004 I use NGK iridium plugs. You can get them for about the same price as the bosch and they are cheaper than denso iridiums and will give the same performance and should last 100,00 mi. You should be able to find them for $7-8/plug. Try a search engine for them or yahoo or ebay. Quote Link to comment Share on other sites More sharing options...
bean_8044 Posted September 12, 2004 Share Posted September 12, 2004 Supras swear by the NGK coppers. More maintainance though Quote Link to comment Share on other sites More sharing options...
JDOwen2 Posted September 12, 2004 Share Posted September 12, 2004 I switched to Denso Iridium and changed my spark plug cables at the same time. MPG went from 18 to 20. ;) Quote Link to comment Share on other sites More sharing options...
sc_toy Posted September 13, 2004 Share Posted September 13, 2004 Forced induction cars like copper NGK-Rs (the MR2SC and Supra guys), for our engines I would use the factory Densos... there's no power gain or fuel economy gain from any of the fancy plugs. The stock ones ignite the mixture just fine as long as the rest of the ignition is in good order. Quote Link to comment Share on other sites More sharing options...
SC4Million Posted September 20, 2004 Share Posted September 20, 2004 I alway thought the reason people used irridium plugs were that it was a "colder" plug. Less likely to cause detonation in high boots and high compression ratio cars. So to me it seems to make no sence to put them in the SC unless you have been adding boost, messing with the compression, have low octane pump gas, or any other reason the cars may be "Knocking" But I could be wrong... Quote Link to comment Share on other sites More sharing options...
sc_toy Posted September 20, 2004 Share Posted September 20, 2004 I alway thought the reason people used irridium plugs were that it was a "colder" plug. Less likely to cause detonation in high boots and high compression ratio cars. So to me it seems to make no sence to put them in the SC unless you have been adding boost, messing with the compression, have low octane pump gas, or any other reason the cars may be "Knocking"But I could be wrong... As far as I know a colder plug doesn't have anything to do with it's metal, it has everything to do with the insulator depth. You should be able to get almost and type of plug in a colder than stock heat range. Colder is only good if you're upping the boost, raising compression, etc. There's no benefit to running a colder plug on a stock engine. Also, I believe the main benefit to the iridium/platinum/etc. plugs is their longevity. Copper plugs produce a stronger spark under full load, hence the lean towards them in boosted engines. This is what I always thought, dunno if it's right though. Quote Link to comment Share on other sites More sharing options...
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