i have searched for awhile and i cannot find a 1 step colder plug...just one of those days. i currentley am running oem plugs. they are crap because i put it new ones, the same ones it changed my air/ fuel alot. made it super lean. i have k an fipk intake, tp and t1r single. with new oem spec plugs. ngk ir ifr7g 11ks i was running 13.5 before vtec and after vtec 14.2 and a 16.0 vtec spike. i am very close to sea level. 250 ft- 100ft. what are one step colder plugs in comparsion to the ngk ir's. thanks in advance

 

you can find NGK heat range 8 plugs, I know they are available and others have used them on this forum. Try a search the part numbers escape me right now.

I'm surprised your setup is running that lean, these cars run so rich I wouldn't expect that much of a difference. Might consider an adjustable fpr, I don't think plugs will be the answer to your issue, once you get the fuel addressed the stock heat range should be sufficient. Heat=power, if you remove too much heat from the combustion chamber you end up losing power.

 

yeah i dont know why im so lean either. im going to get greddy emu tune from giles and he reccomends a step colder plugs for a more agressive tune.

 

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...id=360165459736

these plugs?

 

Yes those are good ones to go with.

If you want to buy them this seems to be the cheapest place to buy from.
That's where I bought mine from.

http://www.bonanzle.com/booths/ngk/items/4...__stock___2668_

 

Denson also do the IK24 Iridium which have a 8 cold rating,

 

I've heard horrible things about the Denso iridiums.

 

yeah ive also heard horrible things about denso. there tips are weak...from what i have heard. i like ngk. thanks for your help everyone i just orderd those

 

I disagree with this. As long as a colder plug doesn't foul out, it's going to provide better performance than a hotter plug. Higher combustion temperature = more power, but higher spark plug tip temperature = greater chance of pre-detonation and more knock retard (less power).

 

Nothing at all wrong with the Denso's. There was a issue a few years ago where by a few people reported the ceramic insulation cracked but this was traced to incorrect installation. I've run plenty of set of both the Denso and NGK's and never had a problem with either, we just get whichever we can the cheapest.

For the price of the NGK's listed in the above link I would jump at the chance and purchase them without hesitation.