what gap should I set these to on a stock internal motor that see's 99% street(no-nos) use? 100 shot and also 75 shot please.

 

i gapped mine to 60 with the nos then 50 when i wasnt running nos so it depends.

 

I have been told to gap it anywhere from .37 to .40 for use with nitrous. My plugs are on order, and should be here tomorrow and when I get them in I am gapping them to .38 on a 100 shot, but mostly NA.

Fry

 

what is the part number on the TR6 plugs?

 

just go to any of our sponsor's sites and look for NGK TR6

 

50-TR6 is the part number, per plug, for the plugs at Thunder. I'm not sure about other sponsers. You need to make sure that you get the regular TR6, and not the Irridium TR6. Irridium coated plugs tend to cause problems down the road. But if you want the irridium's then knock yourself out.

Fry

 

anybody know what gap to set these at for around town driving and some nitrous? I want a good all-around gap for both, I don't plan on pulling them and re-gapping for n2o as this is difficult with headers.

 

I was told .040 for 50/50 street and race..

 

i run a .038 on mine. daily driver, i spray it about 2 to 3 times a month when i head out to the track.

 

3689 is the part number for the iridium ix set. TR6 ix one step colder

3690 is the part number for the iridium ix set TR7 ix: two steps colder


NGK tech says that iridium holds up well under nitrous. He said that they recommend them. Tech's name was Tosh (he was very helpful in answering all my questions) Gap the plugs between .035-.045 depending on your bolt-ons but .040 should be fine for every day use.

75-100/125 on one step colder and 125-200 on two steps colder.

This was the second time I called and got the same information from NGK directly.

 

Gap them .038-.040 and rock out. I daily drive mine and have no issues.

 

See, now I have heard differently. It is my understanding that irridium coated plugs tend to wear out quicker in the ls1. I could very well be wrong, but I remember reading about it a while back. Can anyone else shed some light on this?

Fry

 

thanks guys, that was what I wanted, I appreciate the responses.
gapped to .40 and went in.

 

would .40 be ok on my lt1 too? basic bolt-ons and a 100 wet shot every now and then

 

yes, I have an lt1 and that's what they told me. I told him I'm getting ready to buy another one, but this one is an ls1. He said it will work in either motor.

 

I'm going to call him back to confirm this, I will call them today just to be safe. I believe he told me both the ls1 and lt1 motor there's no problems. I will find out for sure today around 8:30am eastern time. I will post back as soon as they tell me.

 

Sorry, I was busy this morning. I just got off the phone with them. NGK said that it will work fine on the ls1 also. There's no issues using them with nitrous. If you are going with a 125-200 shot, go for the 2 steps colder. The 3690 is the iridium plug. He said they come factory at around .040 but he would drop in down to .035 and you shouldn't have any problems. He hasn't heard any feedback about them not holding up.

One step colder is the 3689.