i was wondering what spark plugs / range etc would go best with an ss/sc cobalt w/ stg 2 and intake and exhaust and what gains if any come from it???

 

I think you stay with stock. Then as you go to a lower pulley say a 2.8-2.7 then you go one range colder.

 

im running 1 step colder NGK BKR7E gapped at .40

 

Id reccomend that too tho because GM stage 2 is ment for the stock car

 

is that iradium or platnuim??

 

Copper.

 

why copper j/w (just trying to learn some new stuff).
and what kind of gains would i get over stock plugs???

 

I dont think you really get gains but it will help your car run smoother once you get a smaller pulley. The iridium plugs are 2 steps colder I believe. (someone correct me if im wrong) The 2 step colder plugs are to be used for 2.6-2.5 pulleys.

 

bump. for any other imput???

 

Im running Zex plugs gapped at .35. The part number is #82003-4.

 

I have been messing with different plugs in my car. I had BKR7EIX (1 step colder Iridiums) in for the summer. When I took them out about 2 weeks ago they where the perfect color of tan. The reason I took them out was that I noticed the car was running alittle rougher as the weather was getting colder so I switched back to BKR6EIX (stock heat range Iridiums) and the car has been running good with them in. When summer comes again I will pull the 6s out and see how they did during winter as I put the 7s back in for summer. I had the 7s gapped at about .039 and they ran nice. I gapped the 6s at .040 and it seems to be running good there.

When/If I put a smaller pulley on I will just leave the 7s in all the time but the gap will probably need some adjusting between summer/winter to run best. (I live in Missouri 100 degree summers and 10 degree winters so some adjustment is needed between seasons...)

Everybody has different mods and climates so different plugs and gaps may work better for each person. If you go into the higer boost levels (over 18 lbs boost) you should probably run copper plugs to get a better spark in the higher compression levels and the copper helps keep the combustion chamber a bit cooler in the higer compression and higher heat.