Copper core spark plugs for ls3
Since you haven't gotten a response, I suggest you go to your favorite parts store and have them look up your vehicle and ask them to grab the copper plugs it lists for your vehicle. Take a look and compare price and try whichever look to be the best quality. Copper plugs are quite affordable so you're not gambling much $.
Good luck.
Good luck.
TECH Fanatic
Joined: Jul 2007
Posts: 1,802
Likes: 333
From: Wilmington, De
NGK TR45 V-Powers are what I run in just about everything.
If you go to the parts store to get them, be prepared for the idiot behind the counter to tell you all about how you're going to be melting pistons and **** going with a copper plug.
If you go to the parts store to get them, be prepared for the idiot behind the counter to tell you all about how you're going to be melting pistons and **** going with a copper plug.
NGK TR-55 at .050 or if that's too hot a cooler NGK TR-6 at .045 seems to work very well in most LS engines. I'd start with the TR-55 at .050 in a stock, near stock, bolt-on NA LS. If the engine has internal mods, cam, ported heads with mote compression, stroker engine etc the NGK TR-6 is a good starting point.
In any case, reading the new plugs may suggest a heat range shift depending on the mods. My 383 LS1 wants TR-6 at .045 but my old heads and cam LS1 liked TR-55's at .050 and the 416 with ported LS3 heads likes TR55's at .050
In any case, reading the new plugs may suggest a heat range shift depending on the mods. My 383 LS1 wants TR-6 at .045 but my old heads and cam LS1 liked TR-55's at .050 and the 416 with ported LS3 heads likes TR55's at .050
Teching In
Joined: Sep 2019
Posts: 4
Likes: 0
Thanks for the fast reply it's a CNC headed decent sized cam SBE LS3. it had br7ef ij it but use to have nitrous. i think I'll try the TR-6
NGK TR-55 at .050 or if that's too hot a cooler NGK TR-6 at .045 seems to work very well in most LS engines. I'd start with the TR-55 at .050 in a stock, near stock, bolt-on NA LS. If the engine has internal mods, cam, ported heads with mote compression, stroker engine etc the NGK TR-6 is a good starting point.
In any case, reading the new plugs may suggest a heat range shift depending on the mods. My 383 LS1 wants TR-6 at .045 but my old heads and cam LS1 liked TR-55's at .050 and the 416 with ported LS3 heads likes TR55's at .050
In any case, reading the new plugs may suggest a heat range shift depending on the mods. My 383 LS1 wants TR-6 at .045 but my old heads and cam LS1 liked TR-55's at .050 and the 416 with ported LS3 heads likes TR55's at .050
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