Tr6 Plugs - Ls1

[lastofthebreed_ws6]

These plugs are from my 2002 WS6. The car had headers and had a tune that gave the car the spark advance table more like a 1999 ws6. Currently it is back to stock exhaust and a stock calibration for a 2002 ws6. These spark plugs came out of it with 25,000km of use in the old configuration they were TR6IX. I installed TR6GP when I did all the new work. Based on these plugs do you think wear looks ok? And do you think the change in spark advance, tune/exhaust will affect the life of the plug choice - I dont want to pull them all back out to go to stock Tr5. I feel these ran clean, and I only use in summer and gets the odd WOT pull. I plan to change ~25-30,000Km.

 

[fantastic]

Yeah, 25,000 Km isn't a lot. I mean if you want long life then move to Iridium. Other than that they look just fine.

 

[lastofthebreed_ws6]

I more mean going to stock tune, with a TR6 plug should be ok?

 

[JavierH19]

Some might say the right plug to use here is one with a notch lower heat range but still keep the standard gap but I think the stock heat range and gap are still fine to use especially since you're changing them early. They don't look too hot but do look warm. Any warmer looking then that and i'd go down a bit on heat range without question but that's close.

Advancing the table makes it ignite earlier all the time and have more time to get heated and retain heat so engineers usually specify a tad colder plug on factory performance cars compared to the regular versions especially if force induction is present. Only in serious applications are notably colder plugs specified since the plugs get hot enough to detonate early since they can have a hot bulb effect.

Nowadays I really like the twin tip spark plugs like the higher end long life ngk's and denso TT and whichever others I don't know the names of. Are those the iridium ix? single tip short interval plugs I think is what they are? I think the twin tips not only last longer especially in waste systems that fire from the ground to the electrode which obliterates untipped grounds but also increase performance further compared to a single tip.

 

[lastofthebreed_ws6]

Those were TR6IX, I swapped to TR6GP this time, factory plug is TR5

 

[FZ1]

.

These plugs are from my 2002 WS6. The car had headers and had a tune that gave the car the spark advance table more like a 1999 ws6. Currently it is back to stock exhaust and a stock calibration for a 2002 ws6. These spark plugs came out of it with 25,000km of use in the old configuration they were TR6IX. I installed TR6GP when I did all the new work. Based on these plugs do you think wear looks ok? And do you think the change in spark advance, tune/exhaust will affect the life of the plug choice - I dont want to pull them all back out to go to stock Tr5. I feel these ran clean, and I only use in summer and gets the odd WOT pull. I plan to change ~25-30,000Km.


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I'd think no worries if it runs good. A 6 is colder than a 5.

 

[lastofthebreed_ws6]

Ya, ive always run the 6, but was tuned with hotter spark / headers. Just hoping the 6's stay ok with stock cal. and exhaust, (dont want to have to pull them back out to go to a 5 if I dont have to)

 

[Patman]

When I was running the TR6 plugs in my 98 Formula I found that they fouled out really fast, after 8000km they were bad enough that the engine started misfiring above 5000 rpm. But I wanted that one step colder plug at the time and I was really good at changing the plugs on that car (could do all 8 in 45 minutes)

 

[slacktide_bitog]

Those plugs don't last long, and that's important considering how difficult the job is on those cars

Consider Denso Iridium TT. The stock heat range is IT16TT, and one heat range colder is IT20TT
Denso 16 = NGK 5
Denso 20 = NGK 6

Of course, NGK has iridium and even ruthenium.
TR5AHX is stock heat range, TR6AHX is the colder one.

I more mean going to stock tune, with a TR6 plug should be ok?

It depends on the driving conditions. I can't imagine driving a stock LS1 in a way that would need colder plugs than stock. You have supercar performance and parking lot speed limits

 

[Lawnman23]

Off topic, but I am happy to see another member of the “Rock Auto vehicle magnets loaded up everywhere” club