Hello All,

I'm about to install Hooker Blackheart LTs and full dual exhaust in my 2000 TA. I planning on changing plugs and wires while I'm at it, since it will be easy to get to them with the exhaust out. I've run E3 plugs in other cars I've owned and have been happy with them, but those cars were stock and that is not my plan for the TA. Eventually after the exhaust my plan is to Install a Procharger Kit. I've done some searching on the forum and can't find anyone that has run E3 plugs, but have found lots of mentions of NGK TR5s. Looking to see if anyone has any opinions on E3 plugs for LS1 applications.

 

They’re a gimmick. Regular ole copper plugs give the best spark, they just don’t last as long. Not that they’re gonna burn up in a week, you just prob won’t get 100k miles out of them.

 

Absolute money grab gimmick. Also, If you go forced induction, 5 series plugs will be too hot. You will need to go to a 6 at minimum, maybe a 7. If you up the boost any more than what a 7 will handle you are looking at a fully forged motor and either learning or buying the knowledge necessary to keep it alive. As long as you are N/A, I would use a platinum or iridium plug because of their electrode longevity. They can easily triple the life of plain old cheap plugs. On the other hand, if you plan on making any changes soon, a cheapo plug will probably last 30,000 miles or so, so why buy expensive plugs that will be tossed out soon.

 

I’d stay with the stock heat range plug unless the supercharger will be on in a timely manner.
The heat range scale isn’t universal across spark plug mfgs. Let’s say 4 represents the stock heat range. With some mfg’s 3 would be a “colder” plug and with others it’d be a step “hotter.”

 

NKG TR-55's are very well proven as outstanding copper core NA plugs for LS engines. Wouldn't waste any time or money on E3's.

 

Thanks for your opinions. Going to go with NGK TR5s Iridium.

Cheers