I'm ordering TR8-IX ($6.99/each).

Two heat ranges cooler than stock.
Same technology, cheaper than Denso's.

Any bad experiences with these plugs?

Anybody happy with them?

 

I've ran the TR5IX and the TR6IX. They are both excellent plugs. They both burn cooler than their copper counterpart.

I'm presently running the TR6IX with a 5# lower, 2.80 upper and ported blower. It has a perfect burn for these mods gapped at .035".

BTW, the TR8IX would be 3 steps colder than stock.

TR6IX Pics:

 

You are truly one of the spark plug changing pioneers.

I need to log onto your site again for a refresher course.

I checked the NGK spark plug look-up catalog on line, and it gives the TR6IX as being the stock replacement plug.


http://www.ngksparkplugs.com/index2....000&country=US

 

I am also using the tr-6 ix's gapped at .35 with no problems... I think they are a great plug.

that link also says that the tr-6's are the stock replacement for the copper plugs too and that isn't right is it?

 

I first ordered the TR6-IX's and then compared them to the factory spark plug. Visually the TR6-IX's looked to be a hotter plug than factory. I then returned the TR6-IX's and purchased TR7-IX's. The TR7-IX's visually looked 1 step colder than the factory 04 plug. The factory plug appeared to look an iridium plug. No verification on this.

So far, so good with the TR7-IX's.

 

How did you judge the heat range (visually)?

 

Judging from your other rides, I don't think your Lightning will be stock for long. I'm Jealous.

 

welcome to the forum Viper TT

 

Hello Viper, nice rides you have.

99 Twin Turbo Viper GTS
927rwhp/1067rwtq @ 17psi
9.72@147.42 mph @ 12psi

Uh, have you tried to run it at 17psi on the track? That 12psi run is insane.

 

Thanks for the welcomes!

The temperature of a spark plug can be determined by how far the tip protrudes into the cylinder relative to the base.

If you look at the pics above, notice how far the center electrode protrudes and compare that to a TR7-IX and you will see the difference.

The Lightning is no longer stock! It has dynoed 392rwhp/506rwtq (SAE) on 93 octane with a JLP Predator Custom Tune, 6lb Lower, Accufab TB, AirForceOne Intake, and Magnaflow catback.

I will be re-dynoing this Saturday to see the results after the Stiegemeier/Apten port work.

It is difficult to go with a handheld programmer when I'm so used to tuning the vehicles myself. For the most part, I'm a DIY person including standalone engine management systems. The Viper and the Supra both have AEM EMS's which I have tuned ground up.

 

Thanks.

I haven't been able to keep a clutch in the car to run more than 12psi at the track.

I'm in the process of breaking in another clutch to see what happens.:

 

GOT ANY PICS OF THAT RIDE?

 

Get some SCT software and tune away. Have you seen some of the turbo kits starting to be made for the Lightnings?

 

When I e-mailed NGK, they told me that they didn't have a direct replacement for our plugs. The iridium plug indicates .052 gap from factory. That's not a good sign.

The stock Motorcraft plugs are made by Denso and are a long life version of their iridium plug. That's why they perform a little better but are more fragile and not as long lasting than stock.

TB

 

KIRST8404: Click on the website link under my profile and there are some pics. My lazy butt hasn't taken any pictures of the turbo system.

2bscrewed: The Lightning is my new daily, therefore I'm trying to keeps things on the calm side. Primarily due to the fact my wife also drives the truck with the kids as passengers. (Since I use her Denali for towing.) I was looking at the SCT Tuning software, but after seeing JLP's results I don't see a need for it. JLP's custom tune put down a flat 11.5:1 AFR and the ignition timing is set on conservative side.

TrackBeast: I thought they were iridiums from the factory, thanks for the information.