Right now I'm running NGK TR-55's, that I installed after the mild rebuild. The car is nothing special, just a .030 over L98 with cleaned up heads, and the hotcam kit, along with SLP headers, ORY, and Mufflex 3-1/2" exh.. It's still got the full, stock TPI intake, but I also have a +few+ o+ther bolt-ons.

Should I stick with the TR-55's, or do you guys like a different plug in these motors? Oh yeah, it's a 91' Z.

 

I use AC Delco Rapid Fires.

 

ummm.......no thanks. lol

 

Whats wrong with them? I use them too.

 

I use good old AC Delco R45TS, but I'm basically stock except for exhaust.

 

I've been running the same Bosch Platinum +4's since 2000 and haven't had a miss yet.

 

I also use the ac delco plugs.Ive tried the "gimmick"plugs and never noticed a difference.Oh,wait a minute,yes i did!My wallet was a good bit lighter

 

reg. ac delco

 

Me too, no problems.

I've heard countless problems with AC rapidfires and the +4's. That's not to say some of you aren't using them successfully, but too many have had problems for me to even try.

 

im running the A/C delco cr45, they have been in there sence i put the motor in the car back in 2000, they have somewhere around 70 - 80 thousand miles on them & still going, although i do have a new set in the top of my tool box that i plan on putting in,... some day.

 

Rapid Fire. Enough said!

 

Accel shorty header plugs. They do wear out a little faster, but they are really easy to change since they are shorter.

 

IROCThe5.7L - I'm from Buffalo too... Actually, Depew. What part are you from?

 

Another vote here.
Laters,
Conrad

 

I too am using the AC delco Rapid-fires. I've heard those that had problems with them were using MSD boxes.

 

Another Vote for AC Delco Rapid Fire

 

West Seneca/Cheektowaga.

 

r45ts for a stock motor, i use r43ts cuz i have nitrous.

 

Autolites. Nothing fancy.

 

Cool - Maybe I'll see you at some Cruise nights over the summer. I always try to hit the big one in Lockport on Tuesday nights. I'ts a little bit of a haul but they have the most cars I've seen at a cruise night around here.

 

Yeap, I tend to find my way to those too

 

i use autolite double platinums. they seems to work very well. i don't have to change them out as often as the delco r44ts copper plug .

 

Delco R43TS... and yes, because of nitrous. I ran some brand of platinums once a long time ago (before the nitrous), they totally screwed up the idle and the car ran like crap.

 

must have been the bosch platinums. they suck.

 

Yep. They worked fine in my german car, though.

 

AC Rapidfire #2.

 

are rapid fires and the R45TS by AC Delco the same plugs?

 

Same brand NOT the same plug!
Look at www.acdelco.com and go to ignition, sparkplugs.