need opinion on iridium plugs

[black_red_rs-t]

I have a turbo 4g67 with a ported, polished, and shaved 4g63 turbo head and the 4g67 cams. I just got my pistons ceramic coated but they are 9:1 and i want to run more boost like somewhere around 17 psi. I melted a ngk bpr6es at 17 psi (boost creep). My car runs great with bpr7es plugs but I wanted some opinions on if I should run iridium plugs since they have such a higher melting point or just stay with the coppper plug. I plan on getting a 255 fuel pump soon so I dont plan on running any more boost than 13 psi until i at least do that. I think I'm running too much compression to take any chances.

 

[Rob10_99]

I have one 1g with iridium plugs in it, it runs just like regular plugs, I havent taken them out to check what they look like.
all stock btw

 

[dsm-onster]

I have a turbo 4g67 with a ported, polished, and shaved 4g63 turbo head and the 4g67 cams. I just got my pistons ceramic coated but they are 9:1 and i want to run more boost like somewhere around 17 psi. I melted a ngk bpr6es at 17 psi (boost creep). My car runs great with bpr7es plugs but I wanted some opinions on if I should run iridium plugs since they have such a higher melting point or just stay with the coppper plug. I plan on getting a 255 fuel pump soon so I dont plan on running any more boost than 13 psi until i at least do that. I think I'm running too much compression to take any chances.

Hmmm, ngk bpr7es plugs have done great for everyone running decent power and big boost. I don't think you should fork out the doe for irridiums just yet. Perhaps preignition from the hotter plug landed the melting of them?

Run what you have and record your knock and try to tune them. If you're still having problems, perhaps then look at other plugs (irridium, bpr8es, etc)

 

[rcrullamas]

i've tried the iridium and they didn't work good for me. at idle and low rpm's or normal driving my car ran fine, but when i punch the gas it would booog. i put my old ngk's back the boooggin went away

 

[black_red_rs-t]

Thanks for all your input guys. I'm probably just going stick with the copper plugs. I still need a datalogger and such so that I can tune it. I wasn't really looking for power as much as I was durability or what would be best to run heat-wise with so much compression and the N/A pistons that come in that motor stock but thanks all.

 

[gob4sho89]

Are you planning on running 17psi on just a 255 fuel pump?WTF With the 255 fuel pump you will need at least a regulator, and I dont think that 450cc injectors would like 17psi. I would say at least 500-550cc injectors, and a logger. I use a pocketlogger and love it, but I havent used dsmlink... good luck

 

[Defiant]

Absolute waste of time, as was this thread without your searching.