Are there any special spark plugs you guys reccomend when running turbo? I'm currently running NGK but my OEM replacement wires aren't cuttin it anymore so I figured I would change the plugs while I'm there.

I tried to get ahold of torque master without any luck, perhaps someone has a partnumber or such from them that I can look into?

Thanks again,
John.

There's more to it than which plugs for NA vers a turbo, and heat-range is the thing to consider, not so much which brand. Things like fuel/air ratio, compression ratio (did you go to higher comp pistons?) and how much boast you're running all have to be taken into consideration. The wrong plugs can foul easily or more likely cause premature ingnition, they can glow like model airplane plugs, not a good thing. Back to which to use, since I'm installing a trubo on my 2.8 shortly, I also have to decide. Whereas I have acces to a dyno and pro race engine builders with lots of turbo expertise I will go with there initial recommendions and then remove and read the plugs. Get yourself a good plug chart, one with pictures of the plugs after they were in an engine. Such will show you what too-cold (heat-range) a plug would look like or too hot etc.
It's good idea to learn that anyway so when ever you change plugs you can get an idea of how your engine is running. I'm sure other folks on this site will have plugs to suggest, just remember, depending on how your particular engine is setup, they may or may aply. BTY I'll pass long anything I learn with respect to selecting the correct heat-rang.

This should help.

What the ID markings on AC Delco plugs mean are here
http://www.acdelco.com/html/pi_plugs_ident.htm
All AC Delco plugs are listed here - it's a cross reference chart
http://www.clubplug.net/cross.html

Standard Fiero plugs are R42TS / AC Rapid Fires are RF1.

I'm presently using AC Delco CR42TS plugs from NAPA in my Supercharged 3.4L

These are "Commercial" use plugs. According to info I found out from the Turbo Buick guys (who are switching to "C" plugs), these plugs are specified for extended high duty applications such as commercial engines that run for long durations (more than four continuous hours on a daily basis) like generators and pumps as well as all supercharged and turbocharged powerplants. According to their data, both the center and side electrodes are larger, and the ceramic formulation of the center insulator has improved heat dissipation characteristics.

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Fiero Fiesta - August 1, 2004 - Calgary, Alberta

3.4L S/C 87 GT www.fierosound.com
2002/2003 World of Wheels Winner &
Multiple IASCA Stereo Award Winner

Mine does fine with the recommended plugs. I do use Bosch Platinum, same ones as they recommend for 3.1 stock.