Good plugs?

[1WickedWS6]

I'm looking to get an idea for a good spark plug for my car. It's only lightly modified right now (full exhaust and an intake lid) and I want to get a good plug that will last me a while without having to change them every year. I've read about a lot of different ones and I can't seem to decide on which ones to get. And I'd just like to get a general consensus as to what everyone else might be running with and has success with. Also some gap suggestions would be a big help as well. Thanks!

[allbaugh_04]

I think I used the NGX TR55s. Can't remember the gap.

[pajeff02]

NGK TR55 plugs here as well. If you want a longer change interval, then the AC Delco Iridiums are the way to go.

[JayTA98]

AC delco Iridiums here

[Spikito]

just ordered TR55s

[JacobLS1]

Im using "TR5". Only because AAP didnt have TR55. Not sure if there is a difference...

[1WickedWS6]

Thanks for the input everyone. I'm gonna go for the ACDelco iridiums and hope they last me a long time. Does anyone have an idea as to what gap they should be set to?

[allbaugh_04]

Stock gaps and recommendations for plugs for your vehicle can be found on NGK's website.

[Supersport0126]

Anybody ever here about nology silver plugs? Just bought them but havnt put them in yet. Suppose to have better electrical and thermal conductivity the iridium and others! Got em off ebay. I dont know. Im gonna try em!

[TA98]

I use TR55's but im switching to AR103's next time around. For a long use plug I would use a ACDelco Iridium.

And Jacob Advance does carry TR55's they just arent listed for our cars. Theyre stocking number 3951. So just ask for that part number next time.

[Nowhereman]

Denso Iridiums.. nothing comes close

[GoldenFlame]

I run NGK TR55's in both the Camaro and the Corvette. Both gapped at .060

Thanks for the input everyone. I'm gonna go for the ACDelco iridiums and hope they last me a long time. Does anyone have an idea as to what gap they should be set to?

I know the Vette guys leave the gap alone on the iridiums "AC Delco website (and other references) tell you NOT to change the gap from the factory set .040"

[Nowhereman]

.040 for em.

[1WickedWS6]

Awesome. Thanks for the info fellas! Why do you say the Denso iridiums are the best? Last longer? Better performance?

[Nowhereman]

Iridiums are not all equal.
They are made differently with different amounts of Iridium in it's design.
I build high performance Harley engines and they are real sensitive to things like plugs.
Having used AC Delco, Autolite, NGK and Densos at one time or another, the Denso's noticably run better cold or hot, clean out quicker, hold gap much longer than the rest and for a two cylinder motor putting out 2 HP per cubic inch, produce a slightly wider torque curve.
Anyone who rides HDs knows that torque is king.
If your motor is producing lots of torque, it's producing HP.
I have them in my LS1, going on 70k miles now.
We pulled em and checked em, the gaps are right on at .040.
Changed out the stock wires to MSDs and put em back in.
They were clean and looked good.
The motor gives me 19 around town and 27 on the road.
There's a reason they cost a little more.
It's the only plug I ever use in my bikes, and LS1.

[1WickedWS6]

That's a pretty convincing write up there man. Maybe I'll give those a try instead. Do you remember a part # for the ones you run in your car?

[Nowhereman]

That's a pretty convincing write up there man. Maybe I'll give those a try instead. Do you remember a part # for the ones you run in your car?

There are two units you can run.
The performance plug is the IT 16 and the "long life" unit is the ZTJ16R10.
I use the ZTJ in my LS1 because it is a resistor type.
Other than that, they are the same.
The non resistor type I use in my bikes.

[1WickedWS6]

Cool. Thanks for the help!

[Supersport0126]

Alright just ignore me! Nobody ever heard of nology silver? Oooook!

[35th-ANV-SS]

Alright just ignore me! Nobody ever heard of nology silver? Oooook!

I haven't, nor could I find any info on them from car forums I belong to.