To TR6, or not to TR6?
Someone melts their stuff down... I'm not gonna be the guy that said it was o.k.


You've built how many engines? Don't give me your sarcasm because I learned enough over the years to make things work. Last edited by Firehawk441; Sep 1, 2009 at 06:00 AM.
*Note: if you have done something to increase cylinder pressure or plan on spraying more, then you may want to look at using a cooler plug.
The Best V8 Stories One Small Block at Time
So why you don't take a time to read the stickies, or go with what they are saying .. man they do alot of tests and they know their stuff better than me and you with TR6
People did it with TR6, but they are not the right one !
So why you don't take a time to read the stickies, or go with what they are saying .. man they do alot of tests and they know their stuff better than me and you with TR6
People did it with TR6, but they are not the right one !
I have trouble believing that.
It's only been fairly recently that the EXPERTS have come out with this info.
People have been using TR6 plugs with nitrous here on LS-1 tech for years.
Check the archives.
You can agree with the experts all you want, but history shows the good 'ol TR6 is just fine for a medium hit.
Buy the "hype" of years gone by if you like, but a non-projected plug IS the right plug for nitrous and it doesn't make any sense to try to run a hot plug in a nitrous motor.
Buy the "hype" of years gone by if you like, but a non-projected plug IS the right plug for nitrous and it doesn't make any sense to try to run a hot plug in a nitrous motor.
Show me the facts where tr6 plugs are damaging engines on medium hits of nitrous where the tune is correct.
Yeah, they can work, but why not just throw in the RIGHT plug instead of one that's mediocre at best.
So why you don't take a time to read the stickies, or go with what they are saying .. man they do alot of tests and they know their stuff better than me and you with TR6
People did it with TR6, but they are not the right one !
LS1 Stock and AFR
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .060
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764; Denso IT-16 (stock number 5325)
Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Autolite 103; Denso IT-20 (stock number 5326)
Not taking sides just wondering why everyone says read stickies but stickes differ from "expert" opinions???? Is this info out dated???
LS1 Stock and AFR
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .060
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764; Denso IT-16 (stock number 5325)
Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Autolite 103; Denso IT-20 (stock number 5326)
Not taking sides just wondering why everyone says read stickies but stickes differ from "expert" opinions???? Is this info out dated???

Because that info has been around for years, and has never been updated as the users of LS1Tech became more knowledgeable. I started to take a shot at removing all of the projected tip plugs in there, but got busy at work and never got back to it.
So blame me

I guess I'll have to make some time to do that soon.
Yeah, they can work, but why not just throw in the RIGHT plug instead of one that's mediocre at best.
Folks on this site have been using them for over a decade for shots of up to 150.
Now thats on the ragged edge for sure, and few will deny that.
But for 75-100 rwhp hits, on a daily driven ride, you can't argue that the TR6 plugs havn't delivered.








