It could be, but I doubt it. I ran that high of a gap if not higher and really never had any sputtering or misfiring issues until around 3000miles running that high gap.

 

i run .28 on BR8es and change them out every 6k...no misfires at all

 

and what do u think the problem is from?

 

so what is the preferred gap for stock spark plugs on a IX running 23psi?

 

i also have these plugs sitting at my house , NGK Iridium BPR7EIX are these good? and what gap should they be at for 23psi?and my mods are in my signature

 

I would go with NGK BR7ES (half step colder than stock)
Gapped anywhere from .022 to .026
Just need to find out where the car starts to misfire, and then gap just slightly closer than that.

 

This is what I did today (same set up) and the car runs fine on boost. My problem, however, is that my idle is all weird now. The car will fall to near 500 RPM at idle when in neutral and then it will climb back up to 1100 RPM. Before I swapped the plugs out today it just stayed at 1100 all the time. wtf? Anyone have any ideas? I will recheck the gap and connections tomorrow I guess...

 

having same issues as well on stock plugs, I'm going to Ivey to figure it out tomorrow. . .

 

r u sure its from plugs!! check the maf!!

 

Its not the MAF. The car idled perfect, I swapped plugs in like 15 mins, then let the car warm up and took it for a spin and the idle is all crappy now. I mean it isnt rough or anything but the RPMs drop. I checked the old BR7ES that were in there previously and looks like they were just dropped in (gapped around 0.030"). I am thinking I may have these gapped too tight and there arent enough amps to produce enough spark at idle with the lower gap.

 

see above post please and comment (hate this new format).

 

did you ever clean your filter like you said you were going to?

Actually thinking about it, I dont think its the plugs causing the idle issue....it just dosent make sense. I dont see spark effecting idle, especially if it runs ok on boost.

 

Well I could see where it would. For starters, the car ran perfectly fine until I changed the plugs. By process of elimination alone that is the ONLY thing I touched on the car from idling fine to dropping off. But really I think the reason may be this and would love some feedback: I think that when you are on boost and the RPMs are higher the plugs draw more current and that in turn makes a nice spark. But at low RPM, such as idle, the plugs pull far less current and there arent enough amps to make a sufficient spark. The low amp spark would be enough if the spark itself were bigger IMO. This is just theory for now but I plan to regap them after work here in a bit and see what happens. I'll post up with what I find out. Also spark effects how the engine runs in general, from idle to redline. No spark = no cylinders firing right? So I can totally see how spark would effect idle.

 

OK, took my plugs out and regapped them to around 0.029"-0.030". Still the same problem. Dug through the garbage and got out my old BR7ES and put them back in place of the new BRP7ES and now everything is magically fine!!! 1100 RPM idle. WTF? I guess my car doesnt like the BRPs. Bad plugs? My tune make the difference? Opinions please.

 

hate to say this but for low boosting (below ~24psi) the oem iridium plugs work just fine. I never have any problem with them even with the gt35r boosting ~23psi on 91 oct wot up to 7500rpms. If you have or can get the oem plugs, use them as the way they came (no gap needed).