which plugs do i run with the 3" pulley system from ZZP? i went to autozone and advance auto parts and they looked at me crazy when i said " i need some ngk brk7e spark plugs"

all they had were OE autolite double platinum .40. and they had platinum. for like 3 dollars. so which one do i buy?

 

bump, someone please help ?

 

Go to CA and they have 1 stage colder plugs made from irrideum. Get those.

http://cobalt-addiction.com/performance.htm

 

Order them off line.

http://www.ngk.com/results_cross.asp...kr7e&x=33&y=13

 

Those are just your standard plug. I think the one stage colder ones would be better.

 

can i buy 1 step colder from a store is what im asking, cause i need them here by 2morrow

 

http://www.southfloridapulleyhq.com/...sss/ec_ngk.htm

thats were i got mine and they had really quick shiping.

 

Find a PERFORMANCE parts near you, they will have them.

 

they probably wont get the order til 2morrow huh, even though im in FLa i doubt it will come the same day

 

dont think i have one near me =/

 

Just get Autolite 3922 copper core plugs. I just bought a set of 4 at napa today for $5.56 and they are 1 range colder than stock.

 

The ONLY plug you want to run is a copper plug 1 step colder comprable or like the NGK BKR7E. Stay away from iridium and platinum unless you like detonation with lots of boost

 

Yeah and its $5.56 with great performance vs. $35 with lots of knock

 

If you arent going to tune your c ar then ya you can put low grade plugs. But if you want to do it the right way then get the irridium plugs and a tune. you will notice a difference.

 

Copper isn't "low grade" friend - it simply performs better and requires more frequent changes. Iridium and/or platinum will detonate easier with more boost

 

I experienced detonation with the iridiums. Worst $$$ I have spent on the Cobalt to date.

 

Well I never claim to know everything. Well all I can say is, I hope i'm right cuz I just spent $30 on the irridium ones. But if I'm wrong then I'm sorry for posting BS.

 

The irridium plugs are more expencive because they're supposed to last for like 100,000 miles, while the (cheap) copper core plugs offer better performance but need changing every ~12,000 miles.

 

And thats why, if your buying the copper ones, you buy like 4 or 5 sets of them. Heck, for the cost 5 sets will cost you less than $30. Then you just change them every second oil change (if you go to 5k or a lil more with full syn like I do).

 

That's right copper plugs should be changed more frequently but there is no debating they are the best for high performance use. Not to bag anyone but frankly there's no debate on this topic among those in the know

 

Why would you get detionation with Irridium and not with copper? I asked everyone I know and they all say the same thing... Irridium is better. It's a more concentrated tip and a superior conductor. Maybe your not gapping them right?

 

irridum has higher heat resistance thus it will take longer to warm up to get to optimal heat range and after that they keep geting hotter cus of the 'superior' spark they can produce and the fact that they retain heat longer than other plugs for the same reason that they take longer to warm up. while they last longer due to the heat resistance they don't perform as well in all situations because they can't cool off as fast as copper plugs. In racing applications you would want them for drags where more heat resistance is better but as a daily driver, auto x or road racing where there is constant ever changing road conditions they won't give you the performance you need right then and there. This is how I have come to understand the difference though I am sure there is a more deeply rooted explanation.

 

I just can't see that. All parts of the car are gonna be warmed up after 2-3 minutes of driving. After that, everything is ready to roll. The Irridium plugs will resist heat, wich means that they are gonna stay right where they need to temp-wise. Where as the coppers will just keep going up. They are more of a constant than the copper plugs.

 

copper plugs cool much faster than iridium so they don't need higher heat resistance to perform well since higher heat dissipation and cooler spark means the plug will cool off faster. The iridiums will resist that same amount of heat but since it does not cool off as fast due to that resistance and hot spark it will keep heating up which is bad especially when running higher amounts of boost. There has already been a huge debate on this forum about the different types of plugs to use and the different gaps.

 

Well I can see this will never be solved. But just one more thing, There is no way a any spark plug is gonna cool down more than another inbetween sparks. Each plug is sparking about 12 times per second at 3000 rmp's. No way anything is cooling with that much heat being put through it. However:... Eh forget it. Theres no winning this. Have a good time with you copper plugs.