Turbo 3.4= what type of plugs?

[d.o.h.c]

Hey guys got my turbo 3.4 dohc runnning. Wanted to know what plugs are the best to run. Part numbers are prefered. I have NGK platinums in there right now, but should I change them for better spark. I do have msd coils and magnacore wires, so I am getting a good singal spark.

[pwmin]

the ngk's should be ok. if not i would either run R42LTS ac delcos or ngk iridium 6044

[ez112]

I'm sorry. I don't know much about turbo boost, but I would like to know why an iridium would be a good plug.

On my Lightning I use NGK TR6's because they are a cold range for the boost. A LOT of people use them.

Iridium are also NOT supposed to be gapped. You get them, pop them it, and that's it. Why would you want a plug you couldn't readjust?

[pwmin]

my L67 ran great on iridiums. i gapped mine, too. i ran TR55IX. R45's and stock platinums ran like shit in it, so i tried a 1/2 step warmer ngx gapped to 45 and it got rid of the driveability issues i had. i know a LQ1-T is diff than an L67, but theyre both boosted.

[z34phoenix]

i too have gapped my iridiums with no issues. personally i dont like plat or iridium plugs in boost aplications... esp on high compression that we have in the LQ1.

the reason it is said not to gap Iridiums is that you could scratch the iridium tips and damage the tip... but if your careful this wont be an issue.

[IsaacHayes]

If you don't use a normal gapper and bend the prong with pliers then you'll be ok. Otherwise you'll break the tip coating.

[pwmin]

i would just try the R42LTS first and see how they do. its the stock TGP plug and the coldest you can get, in ac delco and most, anyway.

[Matt Hawkins]

I run R42LTS with 0.035" gap on my turbo Fiero. The plugs always look great. This is one of the coldest plugs AC Delco makes.

[Matt Hawkins]

I usually run about 20k miles on a set of plugs. I only change them out because it seems like the thing to do.