Copper or Iridium Plugs?

[True240]

Simple question.
Setup- T25 at 1bar. Currently on Denso iridiums but want a better performer. Feels kinda laggy.

[kidinthehall]

ngk bkr7e


"feels kinda laggy"................thats pretty vague. compared to what exactly? a previous set of plugs? just a random butt dyno feeling or what???

[Ghst 01]

NGK's Iridium all the way.....

[West]

Platnium or Copper. Iridium is overpriced and overrated. Waste of money.

[tastyratz]

iridium of course... that was easy :)

[kandyflip445]

Copper. I have Denso Iridiums and I can't tell a difference. Although, they have lasted a LONG time and they're still doin good. Plus I got them for free.

[HaLo]

Use copper: they make a much better spark.

Iridium and platinum are mainly for better duration.... Change the plugs once or twice a year and have a better spark with copper. They are cheaper anyways.

[thelinja]

Use copper ones. The NGK's I use are like $1.40/plug at Advance Auto and I replace them once a year.

[tastyratz]

platinum is for longevity, iridium is for longevity AND better spark. if you look up the properties for iridium as a metal and for copper for a metal you will find that iridium is a better conductor than copper is. you wont always "see" the difference like a big power mod will but its all with the ignition power upgrading... id rather have an efficient car making power than a corner cut car making power with just big boost only. typically a iridium plug will be made better than alot of coppers in their design just because of what they are. DONT think that a 99c copper plug will perform near what a 4$ copper plug will perform, plug design also plays a large roll. i would go with either a quality copper plug or an iridium (since its only a few bucks more anyways for the ngks) and i will never go with a platinum because of the poor conductivity of the metal.

[Muzzy]

if u race go copper....cheap to replace after race

if daily driver go iridium

i think plats suk

[tastyratz]

i totally passed over your first post without realizing... you already have denso iridiums. you wouldnt wanna change since those are great plugs. if you want to work on your ignition system get some good low resistance plug wires and an msd, stick with what you have, i dont know of any plugs out there that would really be a better performer than the denso iridiums...

[Muzzy]

or make a grounding kit

[tastyratz]

grounding kits are a very good thing as muzzy mentioned go for it dude

[True240]

does anyone have exp with the apexi super ground thingy? it looks interesting.