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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Best spark plugs for stock LT1?

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Old 05-26-2011, 05:24 PM
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Default Best spark plugs for stock LT1?
Car is basically stock except for mid length headers. Should I go with regular Delco plugs or maybe a different brand?
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Old 05-26-2011, 05:34 PM
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tr5's are cheaper and work great
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Old 05-26-2011, 06:32 PM
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I heard they were pretty good. Okay I'll give them a try, thx
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Old 05-27-2011, 02:03 PM
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Everybody here seems to just drool over the NGKs..... I've used Bosch Platinum +4s in several of my cars/trucks with good results.
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Old 05-27-2011, 03:04 PM
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I use AC-Delco Rapidfires.
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Old 05-27-2011, 03:30 PM
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AC delcos 906 plug...IMO the best plug.
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Old 05-27-2011, 03:32 PM
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i was running ngk for the longest time...........just switched to autolite and i think i now have a new favorite plug
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Old 05-27-2011, 04:31 PM
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Originally Posted by leadfoot4
Everybody here seems to just drool over the NGKs..... I've used Bosch Platinum +4s in several of my cars/trucks with good results.
I use the Bosch +4 also, I never had any luck with the TR55's. I mean I'd rather change my plugs every 8 yr vs every year.
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Old 05-27-2011, 04:43 PM
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I've pulled way to many bosch plugs out that the tips were disintegrated. Bosch=bad imo....
of course im a nitrous guy and plug tips have to be durable.
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Old 05-27-2011, 05:50 PM
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Originally Posted by shbox
I use AC-Delco Rapidfires.
I tried a set of those too. The SOP dyno didn't notice any big difference. Of course I didn't notice any big gains with the Bosch +4s either....
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