And would a normal store like parts source or something have the one step colder ngks?

 

possibly. an ac delco dealer might be a better bet, or an NGK dealer. there are cross references to different cars.
here is what Maven says, and he is a stellar GM tech, and NOTE WELL the stock gap on Iridium one step colder that I use out of the box. the BRR7EIX-11...


"LSJ Stock: IFR6D10 (Iridium upgrade, I like IR plugs ) Stock Platinum PFR6H10/PFR6T-10G (again almost identical afaik, its jus that one is also an ACDelco plug) Cheapy plugs would be the BKR6E, this should be avaialble everywhere as about 19456million different cars from Audi to Aveo to BMW to VW to Aston Martin use these but they come gapped to .031" which is too small for stock.(though they are conventional plugs so gapping isnt an issue)

LSJ 1 step colder: PFR7H-10(platinum, gapped to stock spec of .040")
BKR7EIX-11 is iridium gapped to .043"
BKR7EIX is iridium gapped to .031"
BKR7E(THE LSJ plug it seems, its just a plain old chapy Vpower gapped to .035" again pretty universal)

LSJ 2 step colder: BKR8EIX (Iridium gapped to .031")


All of these numbers are NGKs, I prefer NGKs, and always use them unless they arent available, in which case I resort to Densos. If you feel like you want to run Autolites or Champions thats on you, but please use this list to cross reference to your favorite brand of plug. If anyone has anything theyd like to add or me to edit please post it up there always seems to be loads of confusion when it comes to plugs.
Please dont ever put LSJ plugs in your 2.2/2.4 just because you went SC/TC. "

 

Yea bkr7e

 

^^^ all your stuff in a box. gonna do a final trial fit on a cobalt tomorrow

 

you should run stock plugs from now to spring in dartmouth no doubt.

 

This.

I ran stock LSJ plugs (NGK/AC Delco Laser Iridium) through GMR S3 even w/ the H62. I did not switch to one step colder plugs until I dropped in the cams and raised the limiter. For me BKR7EIX is where it's at.

John, I'm surprised you don't get spark blowout running the stock gap and a TVS in the colder months. I remember when I first bolted on my H62, I didnt experience spark blowout until October of that year. Gapped the plugs from the stock gap of 0.035" down to 0.032", and was fine.

As for the member asking what to gap your plugs at, it is really trial and error. You want the largest gap possible w/o spark blowout. For a 2.9 M62 car, 0.035"-0.033" would be an acceptable range to try.

I agree. I have a set for sale.



^These are practically brand new. Only 2k miles on them I believe.

 

eix-11 is gapped to .043 stock. and cold weather? what cold weather? car hibernates.

 

Too large of a gap even for a stock LSJ.

 

lol. cold weather hahahahahahahaha

 

True. It's always cold where you are

 

Cant wait!

 

If all these engines are getting misfires then the ignition is not strong enough. Fixing the problem with a narrow plug gap is only covering up the problem. Has anybody fixed the real problem?

 

I've never had a misfire. My narrower gap than stock is to prevent spark blowout from the increased airflow my car produces over stock.

Never had any ignition issues with my car.

 

^^^ this. its the tune

 

After searching there is not much that can help the stock ignition. .033 plug gap... Come on and what part of the tune is going to help that? My 1970 Plymouth Duster with points had a gap bigger than that. If we could light a .045 gap you would feel it. It might take 80000 volts but that's because of the boost. Who's modded their ignition and how?

 

My car had v power when I bought em, dirty spark blowout, I put iridiums in and still blowout plugs really only last me 15 000 I live on the eastern shore which is a hour from Dartmouth Nova Scotia haha it's always cold,

 

Buddy before me had it hp tuned it was the worse tune ever car hesitates and doesn't run that great, he ran v power plugs and I changed the muffler he had It straight piped to stock I got a cat on now, I changed the maf twice car is hard as **** on gas not like it use to be

 

The stock ignition on the SS/SC is more than enough to handle good amounts of power.

Go pick up the LSJ build book and do some reading on the 300+ hp race engine lsj.

 

Fix the darn tune. If you are stuck, get a GM stage 2 and have a rock solid GM backed warranty on the tune. Crate engine depot sell the stage 2 . pay the money and enjoy the results. More bad tunes screw up more cars on this forum , and way more money is spent, after saving nickles and dimes doing it cheaply, than a GM stage 2 set up costs.