Can I improve from Autolite 104s?

[Bru]

I've always ran the 104s because they're cheap and they work. I'm wondering if there are other plugs that offer a similar heat range with better gas mileage, or if the colder heat range and mileage is just something I'll have to deal with regardless of plug maker.

Mods now are 3.4 pulley, headers, CAI, modded stock rockers, DHP 1.0, catless DP and racetronix FP rewire.

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[PANDA]

I run NGK TR6's. I feel my car runs better on them than the autolites, but it may be in my head.

 

[Eagle]

I run NGK TR6's. I feel my car runs better on them than the autolites, but it may be in my head.

I concur. NGKs idle better and seem smoother throughout the rpm range. Although I think AL plugs are a bit more durable in harsh environments.

 

[6literEat'r]

i ran autolites in my gtp and wasnt too happy with them as i got misfires, switched to ngktr6 and had not a problem

 

[Turbocharged400sbc]

never had a problem with em but it never hurts to experiment

if ya wanna improve copper plug life switch coil polarity once or twice during their life

 

[The Broken Regal]

I'm going to try running the NGK this summer, heard lots of good things from people, but AL103/104s havent done me wrong since I had my first regal

 

[Bru]

Think I'm going to pick up some TR6s and try 'em out. Seem to be a comparable heat range to the 104s, though somewhat debatable over at ClubGP. When's the next 50-degree day supposed to be?

 

[TommyGloves]

I like NGK TR6s plugs as well. Improved the idle quality of the Bonne. from AL104s.

 

[Handsome Jesus]

on nitrous I have heard AL104s burn before the pistons. NGKs don't.

I think NGK is a better plug, but more expensive. if you change em out every 6000 miles like I do I just use 104s/103s

 

[TommyGloves]

on nitrous I have heard AL104s burn before the pistons. NGKs don't.

I think NGK is a better plug, but more expensive. if you change em out every 6000 miles like I do I just use 104s/103s

NGKs are $1.99 a plug....and seem to last longer than ALs (from my own experience.) Their part number is 4177. If you order from Advance Auto you get 20% off.

 

[Handsome Jesus]

I should probably go ahead and try TR55s again. or TR6 for the winter...

 

[Bru]

Added plug life would be nice. I'm tired of changing plugs every few thousand miles on what now is the DD.

 

[ktraver97ss]

interesting...Im putting TR6s in my truck right now. had Tr5s but Brandon said I would benefit from the 6's after he tunes for 93 oct, so thats what Im doing.

 

[Eagle]

If Brandon ever said anything about a spark plug to me, I'd listen. Dude is like the spark plug wisperer.

 

[Bru]

That statement has photoshop written all over it.

 

[Handsome Jesus]

I cannot remember the naming convention for NGK plugs. bigger number is hotter?

 

[Eagle]

yes

 

[ktraver97ss]

ummmm Im pretty sure the bigger #s are colder. No?

 

[Eagle]

HA! Correct, you're right Kevin. TR55 then TR6 then TR7.... TR55 is what I ran stock, TR6 on small nitrous, TR7 on turbo. My bad.

 

[PANDA]

I'm pretty sure a TR6 is a colder plug then a TR55.

TR6=104/103.

Yes tell them 4177's or else you will get some moron asking you what kinda car then saying that isn't the right plug.

 

[PANDA]

"The TR55 is recommended for GTs. It can be used on near stock GTPs but we recommend a colder plug for boosted applications.

The TR6 is our most popular plug. It is well suited for 3.4" pulley'd Grand Prix. This plug will give you full mileage and doesn't require any special precautions for use.

When eliminating KR is top priority, when changing your plugs every 6k miles isn't an issue, or when you must push the limits of performance the TR8 race plug does the trick. It is 4 heat ranges colder than stock.

http://zzperformance.com/grand_prix/products1.php?id=240

 

[Handsome Jesus]

maybe picking up some of these TR6 junks on the way home.

 

[TommyGloves]

maybe picking up some of these TR6 junks on the way home.

your cars need TR8s

 

[Handsome Jesus]

LOL. My cars need something that makes them run properly... maybe a new owner?

 

[PANDA]

u need NOS, two bottles. The BIG ones.