Spark Plug question

[MATRIX4.6]

car has 60k and mostly bolt ons and breenspeed/bamachip tunes available via X3. With both tunes 91 octane of course, I get pinging between 4-6k at wot. I haved tried backing out timing but no luck.

 

[MATRIX4.6]

so my questions are is there another variable to adjust that would eliminate that ping. I have tried going as far as -8 retard for the 4-8k parameter...Or is this a sign that its time for new plugs. By the way this is beyond poor quality fuel and a dirty air filter both systems are cleaned regularly and the car has only tasted Shell or Chevron 91 octane.

If i do plugs will the HTO have any neg affects on a non blow engine? Thanks in advance for any clarity...

 

[Five Oh Brian]

A colder plug - like the Autolite HT0 or FRPP 3V0 - would be a great idea. The colder heat range will help in your fight against spark knock. The factory platinum plugs may last a long time, but they don't work as well as a good copper plug.

 

[Sogwap55]

I was just logging on to ask about spark plugs as getting ready to swap mine out.

For a car with basic bolt ons, which plugs would be recommended? Car only has 26k miles but I don't want the dreaded spark plug breakage....

I was thinking of the Brisk plugs, talked to two local shops and they both recommended them. Is that good? It's about $130 for the set.....

Any tips or suggestions before changing them? I know to have the car cold.....

 

[CPman]

I'm no tuner, but could be a slightly lean issue and you could try adding a little more fuel at that RPM range to see if the problem gets any better. I would contact your tuner to be sure.

 

[anthony05gt]

I agree it could be a lean issue here.

By the way Brisk plugs are great for race applications, but will not last as long as Autolites.

 

[kenaimone]

here is a good spark removal guide

C:\Documents and Settings\Owner.YOUR-73CC0455A6\My Documents\mustang stuff\2009-01-02_155622_tsb08-07-06.pdf