You know, there will be someone within the next month asking about these plugs, because they didn't click the SEARCH button.

 

May be a dumb question But what are the different heat ranges used for?

 

NO2 / NA / FI / Different fuel applications

 

As you add horsepower, the temperature in each cylinder increases. Going to a colder heat range allows more heat to flow through the spark plug and into the head, which decreases the cylinder temperature.

 

i have a 5.3 with a cam and nawz. what heat range should i use? also what should i gap them to?











































just kidding..... someone had to do it

 

No use in starting a new thread about this.

In my engine, based on how these plugs look. Would you use the TR55 or the TR6:

The ground straps are modified, not eroded away.







TR6 from cyl #1 on the left, TR55 from cylinder #2 on the right. Both plugs have the same mileage and use on them.

The TR55 appears to have a cleaner porcelain, yet on the ground strap by the base has more carbon than the TR6. Neither of the plugs are showing any detonation, which is really good

What would you run?

 

To really read a plug correctly, you've got to cut it open.

 

If you are going to try to read plugs,invest in a moroso magnifying glass with light made for this.
Cut the threads to so you can see the base fuel ring.